31500

🫁 CPT 31500 — Intubation, Endotracheal, Emergency Procedure

Quick Reference

wRVU: 1.78 | Global Period: 000 (same day) | Assistant Payable: ❌ No | Bilateral Indicator: 0 | Modifier -51 Exempt: ✅ YES

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📋 Clinical Description

CPT 31500 describes emergency endotracheal intubation — the insertion of a flexible plastic tube through the mouth (orotracheal) or nose (nasotracheal), past the vocal cords, and into the trachea to establish a definitive secured airway in an emergency situation where the patient cannot maintain adequate oxygenation, ventilation, or airway protection through non-invasive means. The AMA defines this code under “Introduction Procedures on the Larynx” within the Respiratory System section, and the word “emergency” in the descriptor is the critical qualifier that distinguishes this code from planned or elective intubation performed as part of an anesthesia induction package — elective intubation is never separately reportable under 31500. Per the CMS NCCI Policy Manual (Chapter 5, Section C.10), 31500 shall not be reported when an elective intubation is performed, but may be reported for an emergent intubation performed on a patient who is rapidly deteriorating and requires mechanical ventilation — with the medical record documenting the necessity for emergent intubation.

The procedure most commonly employs rapid sequence intubation (RSI) in the emergency department: medications (induction agent + neuromuscular blocking agent) are administered to sedate and paralyze the patient, the airway is visualized using a rigid direct laryngoscope, video laryngoscope (Glidescope, McGrath, C-MAC, or equivalent), or flexible fiberoptic bronchoscope, and the endotracheal tube is advanced through the vocal cords under direct vision. Per ACEP, CPT 31500 applies regardless of the visualization device used — rigid laryngoscope (standard geometry or hyper-angulated), video laryngoscope, or flexible fiberoptic bronchoscope guidance are all captured by the same 31500 code. The medication administration (induction agents, paralytics, RSI drugs) is included in the 31500 service and not separately reportable. Post-intubation, placement is confirmed by direct visualization, capnography, and chest radiograph. Critically, per NCCI Policy Manual Section C.11, the post-intubation chest X-ray (e.g., 71045, 71046) shall not be separately reported by the physician performing the intubation when it is obtained solely to confirm ET tube positioning — though it may be interpreted and reported by a radiologist under the radiology TC/PC billing model.

31500 is modifier -51 exempt — per AAPC guidance, this code is exempt from the multiple procedure reduction modifier, meaning it does not need the -51 modifier when billed alongside other procedures and is not subject to the fee reduction rules that apply to secondary procedures.

This procedure may be performed in the following clinical contexts:

• Acute respiratory failure (hypoxic or hypercapnic) — The most common indication; the patient fails non-invasive oxygenation (HFNC, BiPAP, CPAP) and requires mechanical ventilation; document the type of respiratory failure (hypoxic, hypercapnic, or mixed), the underlying cause (ARDS, COPD exacerbation, pneumonia, sepsis), and the specific clinical criteria triggering the intubation decision (SpO₂, PaO₂/FiO₂ ratio, work of breathing, GCS).
• Cardiopulmonary arrest — Endotracheal intubation as part of advanced cardiac life support (ACLS) to establish a definitive airway during CPR; document the intubation as a distinct procedure performed in the context of the arrest; evaluate NCCI bundling with concurrent cardiac resuscitation procedures.
• Airway obstruction — Epiglottitis (J05.11), supraglottitis (J04.31), angioedema/anaphylaxis (T78.2XXA), foreign body (T17.990A), large hematoma, or neoplastic compression causing progressive airway compromise; intubation performed before complete obstruction to secure the airway before surgical intervention or definitive treatment.
• Decreased level of consciousness / loss of airway protective reflexes — GCS ≤ 8, severe hepatic encephalopathy, drug/alcohol intoxication, status epilepticus, or massive stroke with bulbar dysfunction requiring intubation to protect the airway from aspiration; document GCS and the specific neurologic indicator prompting intubation.
• Severe trauma with airway compromise — Facial/mandibular fractures, neck trauma with hematoma, blast injury, or thermal/chemical inhalation injury causing airway edema; document the specific mechanism and the evolving anatomic threat to the airway driving the decision to intubate.
• Pre-procedure airway management for critically ill patients in non-OR settings — Intubation of a rapidly deteriorating patient in the ICU, medical floor, or ED prior to an urgent bedside procedure (e.g., emergent central line, emergent bronchoscopy) — document the emergent nature and the deteriorating clinical trajectory.

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🔬 Intubation Techniques — All Captured by 31500

Technique	Device	Clinical Application	Coding Notes
Direct Laryngoscopy (DL)	Standard Macintosh or Miller rigid laryngoscope blade	Traditional technique; provides direct line-of-sight to the glottis; used when anatomy allows; standard for most ED and ICU intubations	All DL intubations = 31500 regardless of blade type; the associated laryngoscopy is NOT separately reportable per NCCI — it is integral to the intubation
Video Laryngoscopy (VL)	Glidescope, McGrath, C-MAC, Storz, King Vision, Airtraq	Provides indirect video-assisted view of the glottis; preferred for anticipated or unanticipated difficult airway; provides superior visualization in obese patients or distorted anatomy	Same 31500 regardless of whether standard or hyper-angulated VL blade is used; per ACEP FAQ, VL intubation uses 31500; no add-on code for VL technique
Flexible Fiberoptic / Video Bronchoscope-Guided	Flexible bronchoscope used as a guide to advance the ET tube	Used for awake intubations in anticipated difficult airway, unstable C-spine, oral/facial trauma limiting mouth opening; the scope guides the tube — scope does not separately constitute a diagnostic bronchoscopy	Per ACEP FAQ, 31500 applies to fiberoptic bronchoscope-guided intubation; the bronchoscope guidance is not separately coded as a bronchoscopy when performed solely to guide tube placement
Rapid Sequence Intubation (RSI)	Any of the above + pharmacologic adjuncts (induction agent + NMB)	Standard ED and most ICU emergency intubation protocol — preoxygenation, defasciculation (if used), induction, paralysis, intubation, confirmation	Medication administration is included in 31500 and is not separately billable; RSI does not change the code; document medications used in the procedure note for clinical completeness
Nasotracheal Intubation	Flexible ET tube passed nasally + laryngoscope guidance	Blind nasal technique (rarely used) or nasopharyngeal visualization-guided; used when oral access is limited (trismus, maxillofacial injury); requires awake or cooperative patient	Same 31500 code for nasotracheal approach; no separate code exists for nasal vs. oral route

31500 Is EMERGENCY Only — NCCI Mandates This

Per CMS NCCI Policy Manual Chapter 5, Section C.10 (Effective 1/1/2025):

“CPT code 31500 describes an emergency endotracheal intubation procedure and shall not be reported when an elective intubation is performed.”

Examples of non-reportable intubations under 31500:

• Intubation performed in the OR as part of planned surgical anesthesia induction → bundled into anesthesia base units (anesthesia provider bills; surgeon does not)
• Elective intubation for planned sedation in a stable procedure patient → not separately reportable
• Elective tracheostomy patient exchange to ET tube → not 31500

The medical record must document the emergent nature of the intubation — the specific clinical deterioration, the failure of non-invasive airway management, or the acute threat to the airway requiring urgent intervention — to defend 31500 on audit.

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✅ Procedure Includes

• Pre-intubation patient positioning, preoxygenation, and preparation
• Topical airway anesthesia application when used (included)
• Administration of RSI medications (induction agent, neuromuscular blocking agent, adjuncts) — included; not separately billable
• Laryngoscopy (direct, video, or flexible bronchoscope) for glottic visualization — integral to 31500; not separately reportable
• Passage of the endotracheal tube through the vocal cords into the trachea
• ET tube cuff inflation and securing (tape, tube holder)
• Confirmation of placement — direct visualization, bilateral breath sounds auscultation, end-tidal CO₂ capnography — included
• Documentation of intubation procedure in the medical record

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❌ Excludes / Do Not Report Together

Code	Description	Relationship to 31500
31505	Laryngoscopy, indirect; diagnostic (separate procedure)	NOT separately reportable with 31500 — per NCCI, laryngoscopy required for ET tube placement is not separately reportable; 31505 (indirect laryngoscopy) is bundled into 31500
31515	Laryngoscopy, direct, with or without tracheoscopy; for aspiration	NOT separately reportable with 31500 when laryngoscopy is used only as the visualization modality for the intubation
31622	Bronchoscopy, rigid or flexible, including fluoroscopic guidance, when performed; diagnostic	When a flexible bronchoscope is used solely as a guide for ET tube placement, 31622 is NOT separately reportable; the bronchoscope guidance is integral to 31500; if a separate, medically necessary diagnostic bronchoscopy is performed as a distinct procedure at the same encounter for a different clinical purpose, it may be separately reportable with modifier -59/XU and full documentation of distinct medical necessity
71045	Radiologic examination, chest; single view	Per NCCI Section C.11, a chest radiograph obtained solely to confirm ET tube positioning after 31500 shall not be separately reported by the intubating physician; a radiologist may separately bill for interpretation under the professional component TC/PC model
71046	Radiologic examination, chest; 2 views	Same rule as 71045 — not separately reportable by the intubating physician when obtained solely for ET tube position confirmation
31600	Tracheostomy, planned (separate procedure)	If surgical airway (tracheostomy) is performed at the same session because intubation failed or was not feasible, 31600 may be separately reportable; per NCCI, 31600 includes the “separate procedure” designation — confirm NCCI edit status before reporting both at the same encounter; when intubation succeeds as the definitive airway management, 31600 should not be reported
31603	Tracheotomy, emergency procedure; transtracheal	Emergency tracheotomy via transtracheal approach — used when 31500 fails or is not feasible (e.g., complete airway obstruction above the cords); 31603 and 31500 are separate emergency airway codes for distinct clinical pathways; when intubation fails and tracheotomy is required, report 31603 (not both)
31605	Tracheotomy, emergency procedure; cricothyroid membrane	Emergency cricothyrotomy — surgical airway of last resort when 31500 fails and 31603 is not immediately available; distinct emergency procedure; report 31605 when cricothyrotomy is the definitive emergency airway, not 31500
Critical Care Codes (99291, 99292)	Critical care services, evaluation and management	31500 is separately reportable alongside critical care codes — per ACEP and NCCI, emergency endotracheal intubation may be billed in addition to critical care; however, the time spent performing the intubation must be excluded from the total critical care time calculation when computing 99291/99292 time; appending modifier -25 is required on the critical care code
E/M codes (992xx / 920xx)	Office or ED visit, any level	Separately reportable with modifier -25 appended to the E/M code — NOT to 31500 — when a significant, separately identifiable E/M service is performed same date; the 000 global means same-date E/M is bundled unless -25 is applied; for ED visits coded with 99283-99285, -25 is required on the E/M code to separately bill 31500 at the same encounter

Critical Care + 31500 — Time Exclusion Rule

Per ACEP FAQ and CMS guidance, 31500 IS separately reportable alongside 99291/99292 (critical care), but the time spent performing the intubation procedure must be deducted from the total critical care time used to calculate the critical care billing. For example: if a physician provides 90 minutes of total critical care but 15 minutes were spent performing the emergency intubation, only 75 minutes count toward 99291/99292 time-based coding. Failure to exclude intubation time from critical care time calculations leads to overbilling of critical care codes — a common audit target. Document the specific start and stop times for the intubation separately from critical care time documentation.

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🌳 Code Tree — Surgery: Respiratory System — Introduction Procedures on the Larynx / Emergency Airway

CPT 31500-31502 Introduction Procedures on the Larynx  
│  
└── ▶▶ 31500 ◀◀ Intubation, endotracheal, emergency procedure ← YOU ARE HERE (Global: 000)  
│  
Related Emergency Airway Codes (when intubation fails or is not feasible):  
├── 31603 Tracheotomy, emergency procedure; transtracheal (Global: 000)  
├── 31605 Tracheotomy, emergency procedure; cricothyroid membrane (Global: 000)  
│  
Planned/Elective Tracheostomy Codes (NOT related to 31500):  
├── 31600 Tracheostomy, planned (separate procedure) (Global: 090)  
├── 31601 Tracheostomy, planned; younger than 2 years (Global: 090)  
│  
Laryngoscopy Introduction Codes:  
├── 31502 Tracheotomy tube change prior to establishment of fistula tract (Global: 000)  
│  
Critical Care Codes (separately reportable with 31500 — time exclusion required):  
├── 99291 Critical care, evaluation and management of the critically ill or critically injured patient; first 30-74 minutes  
└── 99292 Critical care, each additional 30 minutes (List separately in addition to code for primary service)

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💰 RVU & Reimbursement Profile

Component	Value
Work RVU (wRVU)	1.78 (CMS RVU26A; subject to 2026 -2.5% efficiency adjustment on non-time-based services — verify final adjusted value against published CMS RVU26A file)
Non-Facility PE RVU	~0.88 (verify against CMS RVU26A)
Malpractice RVU	~0.16
Non-Facility Total RVU	~2.82 (verify against CMS RVU26A)
Facility Total RVU	~2.28 (verify against CMS RVU26A; most 31500 claims are facility-based — ED or inpatient)
Estimated Medicare Facility Payment (2026)	~$76.15\ast (basedon2026CFof$33.4009 × facility total RVU; actual payment varies by locality GPCI)*
Global Period	000 (same day)
Bilateral Indicator	0 — Not applicable; the procedure is performed on a single midline anatomic structure (trachea); modifier -50 is never appropriate for 31500
Modifier -51 Exempt	✅ YES — 31500 is exempt from the multiple procedure reduction modifier -51; it may be billed with other procedures at the same encounter without fee reduction; do NOT append -51 to 31500
Assistant Surgeon	❌ Not payable — single-provider emergency procedure; assistant surgeon is not medically necessary
Co-Surgeon	❌ Not applicable
Team Surgery	❌ Not applicable
PC/TC Split	❌ No — Procedure code only (Indicator 0)
Anesthesia	When performed by the anesthesiologist as part of planned anesthesia induction, intubation is NOT separately billed — it is included in the anesthesia base units; 31500 is separately reportable ONLY when performed as an emergency procedure outside the planned surgical/anesthesia context

2026 CMS Efficiency Adjustment Impact on 31500 wRVU

CMS finalized a -2.5% efficiency adjustment on work RVUs for non-time-based procedural services effective CY 2026. 31500 is a procedure code (not a time-based E/M or critical care code), so it is subject to this adjustment. The baseline wRVU of 1.78 will be reduced by the efficiency adjustment factor — verify the final adjusted wRVU value against the published CMS RVU26A Physician Fee Schedule file. Critical care codes (99291, 99292) were excluded from the efficiency adjustment by CMS, meaning that when 31500 is billed alongside critical care at the same encounter, the critical care wRVU is unaffected while the 31500 wRVU reflects the efficiency reduction.

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🏷️ Modifier Reference

Modifier	Name	When to Apply
-25	Significant, Separately Identifiable E/M	Applied to the E/M code — NOT 31500 — when a significant, separately identifiable evaluation and management service (ED visit, critical care, or hospital E/M) is performed on the same date as the emergency intubation; required for critical care (99291/99292) and ED E/M codes (99283-99285) when billed on the same date as 31500; intubation time must be excluded from critical care time total
-59	Distinct Procedural Service	When 31500 is billed alongside another procedure that payers may bundle inappropriately; documents genuinely distinct, non-overlapping service; example: 31500 performed for acute respiratory failure alongside a concurrent emergent chest tube insertion (32551) — -59 or XU on the secondary code when needed
-XU	Unusual Non-Overlapping Service	Preferred X modifier over -59 when documenting a non-overlapping distinct service; apply to the secondary procedure when billing 31500 alongside an unrelated concurrent airway or procedural service
-76	Repeat Procedure by Same Physician	When emergency re-intubation is required at a subsequent encounter by the same physician — e.g., accidental extubation in the ICU requiring a new emergent re-intubation event that meets the emergency definition; document the new emergency event as distinct from the initial intubation; do NOT report -76 simply for routine ET tube changes within the global period
-77	Repeat Procedure by Different Physician	Emergency re-intubation performed by a different physician than the original intubating provider

Modifiers NOT Used with 31500

• -51 — NEVER append to 31500; it is modifier -51 exempt
• -50 — NEVER appropriate; the trachea is a single midline structure; no bilateral component exists
• -22 — Rarely applied; the emergency urgency of the procedure may inherently increase complexity (failed intubation requiring adjunct devices, cannot-intubate-cannot-oxygenate scenario), but the 0-day global and low wRVU make -22 claims uncommon; if applied, document specific complexity factors (multiple failed attempts, need for surgical airway adjuncts, significantly abnormal anatomy)
• -57 — The decision to perform an emergency intubation is inherently made at the bedside in an emergency — -57 (decision for major surgery) applies to 90-day global procedures; 31500 has a 000 global and -57 is not applicable

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🩺 Common ICD-10-CM Pairings

Respiratory Failure — Primary Diagnoses

ICD-10 Code	Description	HCC?	Clinical Notes
J96.01	Acute respiratory failure with hypoxia	✅ HCC	Most commonly paired primary diagnosis for 31500 — acute hypoxic respiratory failure requiring emergency intubation and mechanical ventilation; HCC code with significant risk adjustment weight; confirm the type of respiratory failure (hypoxic = low PaO₂, SpO₂; hypercapnic = elevated PaCO₂) in the clinical documentation before assigning the subtype
J96.11	Chronic respiratory failure with hypoxia	✅ HCC	Use when the respiratory failure is chronic — COPD patients with chronic hypoxia who develop an acute decompensation; if both acute and chronic, use J96.21
J96.21	Acute and chronic respiratory failure with hypoxia	✅ HCC	Use when the provider documents both an acute exacerbation AND underlying chronic respiratory failure — the most specific and complete code for decompensated chronic lung disease requiring intubation; do not use the “unspecified” codes when acute vs. chronic status is documented
J80	Acute respiratory distress syndrome (ARDS)	✅ HCC	Use when ARDS (bilateral pulmonary infiltrates, PaO₂/FiO₂ < 300, non-cardiogenic origin) is the documented etiology of the respiratory failure requiring intubation; ARDS is an MCC in the inpatient DRG system and requires specific documentation of the Berlin criteria or equivalent provider diagnosis

Sepsis / Critical Illness

ICD-10 Code	Description	HCC?	Clinical Notes
A41.9	Sepsis, unspecified organism	✅ HCC	Use as primary or secondary diagnosis when sepsis-related respiratory failure or septic shock is driving the intubation; confirm the documentation of sepsis (not merely “infection”) per Sepsis-3 criteria — two or more SOFA points + suspected infection; if septic shock is present, use A41.9 + R65.21
R65.21	Severe sepsis with septic shock	✅ HCC	Report as secondary when septic shock is the documented clinical scenario requiring intubation; always paired with the underlying infection/organism code (e.g., A41.9 + R65.21); an MCC in the inpatient DRG system

Neurologic / Airway Protective Reflex

ICD-10 Code	Description	HCC?	Clinical Notes
G93.1	Anoxic brain damage, not elsewhere classified	✅ HCC	Use when post-cardiac arrest anoxic brain injury is the primary reason for ongoing intubation and mechanical ventilation; document the cardiac arrest separately (I46.9 or organism-specific); anoxic brain damage is an MCC
I46.9	Cardiac arrest, cause unspecified	✅ HCC	Use as primary or secondary diagnosis when emergency intubation is performed in the context of cardiopulmonary arrest during ACLS; document the presumed etiology of the arrest (cardiac, respiratory, etc.) as a secondary diagnosis when known
R09.01	Asphyxia	❌ No	Use when asphyxia (insufficient oxygen delivery to the tissues) is the documented acute condition requiring emergency intubation — mechanical asphyxia, positional asphyxia, near-drowning; document the mechanism

Obstructive Airway — Infectious / Inflammatory

ICD-10 Code	Description	HCC?	Clinical Notes
J05.11	Acute epiglottitis with obstruction	❌ No	Use when acute epiglottitis with documented airway obstruction is the indication for emergency intubation; the obstruction subclassifier is required — not interchangeable with J05.10 (without obstruction); documents the urgency driving 31500
J04.31	supraglottitis, unspecified, with obstruction	❌ No	Use when supraglottitis (not specifically epiglottitis) with obstruction drives the emergency intubation; confirm the “with obstruction” designation in the clinical record

Pulmonary — Primary Diagnoses

ICD-10 Code	Description	HCC?	Clinical Notes
J44.1	Chronic obstructive pulmonary disease with (acute) exacerbation	✅ HCC	Use for COPD exacerbation-driven hypercapnic respiratory failure requiring emergency intubation; confirm “acute exacerbation” documentation — not merely chronic stable COPD; HCC code
J45.51	Severe persistent asthma with acute exacerbation	✅ HCC	Use for near-fatal or status asthmaticus requiring emergency intubation; confirm the severity classification (severe persistent) and the acute exacerbation in the clinical record; HCC code
J18.9	Pneumonia, unspecified organism	❌ No	Use for pneumonia-driven acute hypoxic respiratory failure; code the causative organism when identified (e.g., J15.212 for COVID-19 pneumonia, J15.1 for pneumococcal, etc.) — J18.9 is a fallback when organism is unknown

Trauma / Toxic / Environmental

ICD-10 Code	Description	HCC?	Clinical Notes
T78.2XXA	Anaphylaxis, initial encounter	❌ No	Use when anaphylaxis-related laryngeal edema or airway compromise is the indication for emergency intubation; document the causative agent as a secondary code (food, drug, bee sting, etc.); 7th character A = initial encounter
T17.990A	Foreign body in respiratory tract, part unspecified causing asphyxiation, initial encounter	❌ No	Use for foreign body asphyxiation requiring emergency intubation (when above the ET tube level or when intubation bypasses the obstruction); document the foreign body location and mechanism
J68.0	Chemical pneumonitis due to solids and liquids	❌ No	Use for aspiration-related respiratory failure (chemical pneumonitis from aspiration) requiring emergency intubation; often seen in obtunded patients; supports medical necessity for the emergency airway

CDI Querying Priority for 31500 — Respiratory Failure Subtype

The single highest-impact CDI query opportunity associated with 31500 is confirming the subtype of respiratory failure: acute vs. chronic vs. acute-on-chronic, and hypoxic (J96.01, J96.11, J96.21) vs. hypercapnic (J96.02, J96.12, J96.22) vs. unspecified (J69.0, J96.10, J96.20). All subtypes in the J96.xx family are HCC codes — the documentation specificity directly affects risk adjustment and, in the inpatient setting, MCC/CC classification. Respiratory failure of any type documented in a patient requiring emergency intubation and mechanical ventilation should be coded to its most specific subtype. When the provider documents “respiratory failure” without further specification, a CDI or coding query should be generated to confirm the acuity (acute vs. chronic) and the physiologic type (hypoxic, hypercapnic, or combined). Defaulting to J96.00 (unspecified, without mention of hypoxia or hypercapnia) when clinical indicators of the specific type are present in the record is a specificity gap.

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🏥 MS-DRG Considerations (Inpatient)

Inpatient Coding Reminder

At the inpatient facility level, the ICD-10-PCS procedure code is required — not the CPT code. The PCS procedure code for emergency endotracheal intubation is 0BH17EZ (Insertion of Endotracheal Airway into Trachea, Via Natural or Artificial Opening) — see PCS section below. When mechanical ventilation follows the emergency intubation, the PCS mechanical ventilation code is also assigned (5A1935Z, 5A1945Z, or 5A1955Z depending on duration). The presence of mechanical ventilation ≥ 96 consecutive hours with or without tracheostomy is a major DRG grouper factor — it shifts the DRG assignment away from the principal diagnosis-based MDC DRG to the ventilator support DRGs (e.g., DRG 003 - ECMO or Tracheostomy with MV ≥ 96 Hours; DRG 004 - Trach with MV ≥ 96 Hours or PDX Except Face, Mouth, and Neck Diagnoses with Major O.R.; DRG 870/871 - Septicemia with MV ≥ 96 Hours). At the profee level, 31500 is separately reportable by the emergency physician, intensivist, or treating physician who performs the emergency intubation, and is billed alongside any concurrent critical care or E/M codes with modifier -25 on the E/M/critical care code.

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🔧 ICD-10-PCS Equivalents (Inpatient Facility Coding)

Note

At the inpatient facility level, CPT 31500 is represented by an ICD-10-PCS Insertion code — root operation Insertion (H) — defined as putting in a nonbiological appliance that monitors, assists, performs, or prevents a physiological function but does not physically take the place of a body part. The endotracheal tube is a device (Endotracheal Airway, device value E) inserted into the trachea (body part 1 in the Respiratory System body system). The approach for orotracheal or nasotracheal intubation is Via Natural or Artificial Opening (7) — the tube is advanced through the natural oral or nasal opening without cutting through the skin. If a video laryngoscope or flexible bronchoscope provides endoscopic visualization during the intubation, the approach may be Via Natural or Artificial Opening Endoscopic (8). The medical record should specify the visualization technique to determine the accurate approach character.

PCS Code	Full Description	Applicable Scenario
0BH17EZ	Insertion of Endotracheal Airway into Trachea, Via Natural or Artificial Opening, No Qualifier	Standard orotracheal or nasotracheal intubation — natural opening approach (oral or nasal cavity); most common PCS code for 31500
0BH18EZ	Insertion of Endotracheal Airway into Trachea, Via Natural or Artificial Opening Endoscopic, No Qualifier	Intubation performed with endoscopic visualization — video laryngoscope or flexible bronchoscope used to guide the tube; “Endoscopic” approach character (8) reflects the use of a scope to visualize during the natural opening approach

PCS Character Analysis — 0BH17EZ

Position	Character	Value	Definition
1	Section	0	Medical and Surgical
2	Body System	B	Respiratory System
3	Root Operation	H	Insertion (putting in a nonbiological appliance that monitors, assists, performs, or prevents a physiological function but does not physically take the place of a body part — the endotracheal tube assists ventilation without replacing the trachea)
4	Body Part	1	Trachea
5	Approach	7	Via Natural or Artificial Opening (entry of instrumentation through a natural or artificial external opening to reach the site of the procedure — the oral or nasal cavity is the natural opening through which the ET tube passes)
6	Device	E	Endotracheal Airway (the endotracheal tube with cuff is classified as an Endotracheal Airway device in PCS)
7	Qualifier	Z	No Qualifier

PCS Approach: Via Natural Opening (7) vs. Via Natural Opening Endoscopic (8)

• Use approach 7 (Via Natural or Artificial Opening) for standard direct laryngoscopy intubation — the tube is advanced through the natural oral or nasal cavity without the use of an endoscope providing continuous visualization
• Use approach 8 (Via Natural or Artificial Opening Endoscopic) when a video laryngoscope or flexible fiberoptic bronchoscope provides endoscopic guidance during the intubation — the endoscopic visualization distinguishes approach 8 from approach 7
• In practice, video laryngoscopy is now the dominant technique in most ICUs and EDs; when video laryngoscopy is documented, approach 8 (0BH18EZ) may be more accurate; confirm documentation of the visualization device before assigning the approach character
• Note: In the inpatient PCS world, facilities may have local coding policies on approach character selection for VL vs. DL intubation — consult your facility’s coding guidelines

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📝 Coding Examples

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Example 1 — Emergency Department: Emergency Intubation for Acute Hypoxic Respiratory Failure

Clinical Scenario: A 67-year-old male with a history of COPD presents to the ED via EMS with acute respiratory distress — SpO₂ 78% on high-flow O₂ at 15L/min, respiratory rate 36, GCS 12. Chest X-ray on arrival shows bilateral infiltrates. The emergency physician documents a Level 5 ED visit including the evaluation, chest X-ray review, treatment decisions, and initiation of care. After a 20-minute HFNC trial fails to improve oxygenation (SpO₂ remains 84%), the emergency physician performs rapid sequence intubation: etomidate 20mg IV and succinylcholine 120mg IV administered, McGrath video laryngoscope used for visualization, grade 1 view obtained, 7.5mm ET tube advanced through the vocal cords and into the trachea on the first attempt, cuff inflated, bilateral breath sounds confirmed, ETCO₂ confirmed, and a post-intubation chest X-ray is ordered for tube position confirmation. The physician documents the ED visit and the intubation procedure separately. Total physician time with the patient is 55 minutes, of which 15 minutes are spent performing and recovering from the intubation procedure.

Field	Code	Rationale
CPT 1	99285--25	Level 5 ED E/M — Level 5 documented for high medical decision-making complexity (new problem requiring additional workup, high risk interventions); modifier -25 on the E/M code, NOT on 31500; the evaluation and treatment decisions constitute a significant, separately identifiable service
CPT 2	31500	Emergency endotracheal intubation — documented as RSI using video laryngoscope; emergent indication confirmed (failed HFNC, SpO₂ 84%, acute hypoxic respiratory failure); modifier -51 exempt; not separately appending -51
PDx	J96.01	Acute respiratory failure with hypoxia — SpO₂ 78-84% documented; bilateral infiltrates on CXR; type (hypoxic) confirmed from clinical indicators; HCC code
SDx	J44.1	COPD with acute exacerbation — underlying lung disease contributing to the acute failure; HCC code

Note

The post-intubation chest X-ray is not separately billable by the emergency physician under 71045 or 71046 when ordered solely to confirm ET tube position — per NCCI Section C.11. If the radiologist separately interprets the chest X-ray, the radiologist may separately bill under the professional component. If the chest X-ray also reveals a new significant finding beyond tube position (e.g., tension pneumothorax, new large effusion) that drives a separate clinical decision, the radiologist’s professional read is separately reportable — but the emergency physician’s ordering of the film for tube position confirmation remains bundled into 31500.

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Example 2 — ICU: Emergency Intubation Concurrent with Critical Care

Clinical Scenario: A 58-year-old female with septic shock (K. pneumoniae bacteremia from a urinary source) is admitted to the MICU. Over 4 hours, she develops worsening hypoxemia and hypercapnia despite BiPAP. The intensivist provides critical care services for 75 minutes of direct face-to-face time (documented as critical care activities: reviewing serial ABGs, titrating vasopressors, discussions with family, reviewing culture data, and managing ventilator settings). During this critical care period, the intensivist spends 20 minutes performing and recovering from emergency orotracheal intubation (RSI; direct laryngoscopy; first-pass success). The intensivist documents the critical care activities and separately documents the intubation procedure, explicitly noting the 20 minutes dedicated to the intubation procedure.

Field	Code	Rationale
CPT 1	99291--25	Critical care, first 30-74 minutes — the billable critical care time is 55 minutes (75 total minus 20 minutes for the intubation procedure); modifier -25 appended to 99291 to confirm a significant separately identifiable service is billed in addition to the procedure; 55 minutes meets the 30-74 minute threshold for 99291
CPT 2	31500	Emergency endotracheal intubation — separately reportable alongside critical care; 20 minutes of intubation time documented and excluded from critical care calculation; modifier -51 exempt
PDx	A41.52	Sepsis due to Pseudomonas (or A49.8 with B96.1 for Klebsiella — confirm organism code) — principal diagnosis is the specific organism causing sepsis; document from culture report
SDx	R65.21	Severe sepsis with septic shock — documents the septic shock complication; HCC; MCC in the inpatient DRG system; paired with the sepsis code
SDx	J96.21	Acute and chronic respiratory failure with hypoxia — respiratory failure type is acute-on-chronic (sepsis-driven acute failure on underlying mild chronic COPD); most specific code

Warning

The time exclusion rule is the most audited element in critical care + 31500 billing. If the physician documents 75 minutes of critical care time and bills 99291 + 99292 (for 90 minutes) while also billing 31500 without deducting the intubation time, the claim is overbilled. Document explicitly: “75 minutes critical care provided; 20 minutes dedicated to emergency intubation procedure, excluded from critical care time per CPT guidelines; 55 minutes critical care time billed = 99291.” This documentation creates an auditable record of the time exclusion calculation.

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Example 3 — Inpatient Floor: Emergency Intubation for Anaphylaxis

Clinical Scenario: A 29-year-old female with a history of shellfish allergy is admitted to a medical-surgical floor for an elective procedure when she develops acute anaphylaxis after receiving IV contrast for a CT scan ordered by the hospitalist. She develops laryngeal edema with stridor, SpO₂ dropping to 91% on room air, and progressive inspiratory stridor. The hospitalist administers IM epinephrine, IV diphenhydramine, and IV methylprednisolone, but within 10 minutes she develops complete loss of audible breath sounds over the left side and near-complete upper airway obstruction by auscultation. The hospitalist performs emergency orotracheal intubation using a standard Macintosh direct laryngoscope — requires two attempts due to airway edema, intubation successful on the second attempt, confirmed with ETCO₂ and auscultation. A separate inpatient E/M is documented for the hospitalist’s management of the anaphylaxis episode including medication administration decisions, the decision to proceed with intubation, and subsequent floor management.

Field	Code	Rationale
CPT 1	99233--25	Subsequent hospital care, Level 3 — high medical decision-making complexity (new urgent problem requiring immediate intervention); modifier -25 on the E/M, NOT 31500; separately identifiable evaluation and management of the anaphylaxis episode
CPT 2	31500	Emergency endotracheal intubation — two attempts documented; emergent indication confirmed (anaphylaxis-related laryngeal edema, near-complete airway obstruction, failed medical management); modifier -51 exempt
PDx	T78.2XXA	Anaphylaxis, initial encounter — the anaphylactic reaction is the primary acute event; 7th character A = initial encounter (first episode of anaphylaxis being treated)
SDx	T65.92XA**	Toxic effects of unspecified substance — or confirm the appropriate contrast/drug reaction code; document the causative agent (IV iodinated contrast) for specificity; the anaphylaxis coding guidelines require the causative agent to be coded as a secondary code
SDx	J38.4	Edema of larynx — documents the laryngeal edema complication of the anaphylaxis that specifically created the airway emergency requiring 31500

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⚠️ Common Coding Pitfalls

• Reporting 31500 for elective intubation performed as part of planned anesthesia: This is the single most clearly defined billing error for 31500, per NCCI Policy Manual Section C.10. Elective intubation performed as the induction step for planned surgery is bundled into the anesthesia base units — the anesthesia provider bills under the anesthesia CPT code family; the surgeon does not separately bill for the intubation. 31500 is restricted to emergency, unplanned intubations. When audits identify 31500 billed for pre-operative intubations in the OR setting, they are recouped as incorrect coding. Educate providers that the “emergency” qualifier is the entire basis of 31500’s separate reportability, and that the medical record must document the emergent clinical scenario.

• Not excluding intubation time from critical care time when billing both 31500 and 99291/99292: The time-exclusion rule for critical care when 31500 is also billed is one of the most commonly violated billing rules in emergency medicine and critical care coding. The time spent performing the emergency intubation (from preparation through tube confirmation and documentation) must be subtracted from the total critical care time before applying the 99291/99292 time thresholds. Failure to document and subtract intubation time is a systematic overbilling pattern that shows up repeatedly on RAC and OIG audits of ED and ICU billing. Build the time exclusion documentation into the provider procedure note template.

• Separately billing the post-intubation chest X-ray under 71045 or 71046 by the intubating physician: Per NCCI Section C.11, a chest radiograph obtained to confirm ET tube positioning after 31500 is not separately reportable by the physician who performed the intubation. This is a common billing error in emergency medicine where the EP orders the post-intubation CXR and also reads it. The CXR professional interpretation may be separately billed by a radiologist; the ordering physician’s payment for 31500 includes the clinical oversight of tube position confirmation.

• Failing to apply modifier -25 to the same-date E/M or critical care code: Because 31500 has a 0-day global, same-date E/M services are bundled unless modifier -25 is appended to the E/M code. In the ED setting especially, the E/M visit (which evaluates and treats the underlying condition) is a distinct, separately identifiable service from the intubation procedure itself. Failing to apply -25 to the E/M code causes the E/M payment to be bundled into the 31500 payment, losing significant E/M revenue — particularly for Level 4 and Level 5 ED visits commonly concurrent with emergency intubation. The -25 modifier goes on the E/M code, never on 31500.

• Appending modifier -51 to 31500: 31500 is explicitly modifier -51 exempt. Appending -51 to 31500 when it is billed with other same-session procedures will apply an unnecessary fee reduction that is not warranted. The -51 exemption means 31500 is always paid at full value alongside other procedures — no reduction. Remove -51 from any 31500 claim before submission.

• Under-coding respiratory failure ICD-10-CM type in the context of 31500: Emergency intubation for respiratory failure should always drive a CDI query or coder review to confirm the most specific J96.xx subcode. The distinction between hypoxic (J96.01) vs. hypercapnic (J96.02) vs. acute and chronic (J96.21/J96.22) vs. unspecified (J69.0) has direct HCC risk adjustment impact and affects MCC/CC DRG tier assignment in the inpatient setting. Defaulting to J69.0 (unspecified) when clinical indicators (ABG values, SpO₂, PaCO₂) clearly document the type is a specificity and revenue gap that is 100% preventable with provider documentation education.

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📎 Sources

^{AMA CPT 2025 Professional Edition} · ^{CMS NCCI Medicare Policy Manual Chapter 5 (Surgery: Respiratory, Cardiovascular, Hemic and Lymphatic Systems), Sections C.10 and C.11 — CPT Code 31500 Emergency Intubation Rules, Revision Date 1/1/2025} · ^{CMS 2025 Medicare Physician Fee Schedule Final Rule (CMS-1807-F) and CMS 2026 MPFS Final Rule (CMS-1832-F)} · ^{CMS RVU26A Relative Value Files} · ^{ICD-10-CM Official Guidelines for Coding and Reporting FY2025} · ^{ICD-10-PCS Official Guidelines for Coding and Reporting FY2025} · ^{ACEP — Endotracheal Intubation FAQs (American College of Emergency Physicians, 2026)} · ^{AAPC — “Proper Coding for Endotracheal Intubation” (AAPC Knowledge Center, September 2014)} · ^{AAPC Pediatric Coding Alert — “Intubation: Reader Question}