Crystal's Coder Hub🫁 CPT 31420 — Epiglottidectomy
Quick Reference
wRVU: 5.67 | Global Period: 090 (90 days) | Assistant Payable: ✅ Yes | Bilateral Indicator: 0
📋 Clinical Description
CPT 31420 describes the surgical excision of all or a portion of the epiglottis — the supraglottic cartilaginous flap at the laryngeal inlet that is critical to the swallowing-airway protective reflex. The procedure is performed via direct laryngoscopy under general anesthesia (endotracheal intubation or jet ventilation), with the patient in the supine position and the neck extended. Once the laryngoscope suspends the larynx and provides access, the epiglottis is excised using cold steel microlaryngeal instruments, CO2 laser, monopolar cautery, bipolar cautery, or a powered microdebrider — the specific technique depends on the pathology, surgeon preference, and the extent of epiglottic tissue to be removed. The procedure may involve partial epiglottidectomy (trimming the superior epiglottic edge) or complete epiglottidectomy (removal of the entire epiglottis to the petiole) depending on the indication.
CPT 31420 is the only CPT code in the Excision Procedures on the Larynx subsection specifically dedicated to epiglottidectomy. It should not be confused with 31540 (direct operative laryngoscopy with excision of tumor and/or stripping of vocal cords or epiglottis) — the key distinction is procedural intent and extent: 31420 is epiglottidectomy as the primary and named procedure; 31540 describes operative laryngoscopy where tumor excision or vocal cord stripping that happens to involve the epiglottis is the primary service. When the epiglottis is excised as the primary surgical objective, 31420 is correct. When the epiglottis is stripped or a tumor partially removed as part of a broader operative laryngoscopy that primarily targets the vocal cords or laryngeal tumor, 31540 or 31541 may be more appropriate — review the operative note to confirm the primary surgical target and technique.
This procedure may be performed in the following clinical contexts:
- Epiglottic malignancy (primary epiglottic carcinoma or supraglottic laryngeal carcinoma) — Squamous cell carcinoma of the supraglottis/epiglottis may be treated with partial or total epiglottidectomy via direct laryngoscopy as the primary trans-oral laser microsurgery (TLM) or open surgical approach; document tumor histology, stage (clinical and pathologic), and margins; when combined with neck dissection or other procedures, each separately reportable.
- Epiglottic cyst (mucous retention cyst, ductal cyst) — The most common benign epiglottic lesion; mucous retention cysts of the lingual surface of the epiglottis may grow large enough to cause dysphagia, globus sensation, or airway obstruction; epiglottidectomy or cyst marsupialization/excision via direct laryngoscopy is the standard treatment; document the cyst type, size, and symptom burden.
- Omega/infantile epiglottis / laryngomalacia — In pediatric patients with laryngomalacia (inspiratory stridor, feeding difficulties), the omega-shaped or curled epiglottis may contribute to supraglottic collapse; supraglottoplasty — which includes partial epiglottidectomy along with aryepiglottic fold division — is the definitive surgical treatment; document the laryngomalacia severity score and the specific components of the supraglottoplasty.
- Recurrent/chronic supraglottitis or epiglottitis with structural epiglottic pathology — Recurrent episodes of epiglottitis or supraglottitis resulting in a chronically edematous, fibrotic, or anatomically distorted epiglottis causing persistent dysphagia, airway compromise, or recurrent infection; epiglottidectomy removes the repeatedly infected tissue; document the recurrence history, prior treatment, and current functional impairment.
- Obstructive sleep apnea with epiglottic collapse — A subset of OSA is caused or exacerbated by posterior epiglottic collapse (EpiC — epiglottic collapse) identified on drug-induced sleep endoscopy (DISE); epiglottidectomy or epiglottic stiffening procedures may be performed; document DISE findings, AHI, CPAP failure/intolerance, and the specific epiglottic collapse pattern.
- Dysphagia from epiglottic anatomic abnormality — Post-radiation epiglottic fibrosis, post-surgical epiglottic distortion, or primary anatomic epiglottic abnormality causing severe dysphagia where epiglottic excision is performed to improve laryngeal protection during swallowing or facilitate rehabilitation.
🔬 Technique & Clinical Considerations
| Excision Technique | Clinical Application | Key Coding & Clinical Notes |
|---|---|---|
| CO2 Laser Microlaryngoscopy | Endotracheal intubation (laser-safe tube) or jet ventilation; CO2 laser set to excision mode; epiglottis excised with precise vaporization from superior tip downward to desired level; bleeding controlled with laser defocused | Gold standard for epiglottic tumors and cysts requiring precise margins; document laser type (CO2), settings, excision extent (partial vs. complete), and airway management technique; CO2 laser use does not change the CPT code — 31420 is reported regardless of technique |
| Cold Steel Direct Microlaryngoscopy | Laryngoscope suspended; Jako scissors or microlaryngeal forceps used to excise epiglottis in a cold technique; hemostasis with suction cautery or bipolar cautery | Used for benign cysts, pediatric laryngomalacia (supraglottoplasty), or when laser is not available; document instruments used; technique does not affect code selection |
| Microdebrider-Assisted Excision | Powered microdebrider with laryngeal blade used to debulk and excise the epiglottis; preferred by some laryngologists for supraglottoplasty | Common in pediatric supraglottoplasty; document microdebrider use; does not change CPT code |
| Partial Epiglottidectomy | Excision of only the superior portion or free margin of the epiglottis — typically 50% or less of the structure; preserves the petiole, valleculae, and base of tongue anatomy | Code 31420 is appropriate for partial excision; document the percentage or anatomic extent of epiglottis removed; if substantially less than typical (e.g., very small biopsy-sized specimen), evaluate whether modifier -52 (reduced services) is warranted |
| Complete Epiglottidectomy | Total excision of the epiglottis to the level of the petiole and thyroid cartilage attachment; greater risk of post-operative aspiration | Document the complete extent of excision; in oncologic cases, pathologic margin assessment is critical; when performed as part of supraglottic laryngectomy, confirm correct principal procedure code — 31420 alone may undercode a full supraglottic laryngectomy |
Critical Distinction: 31420 vs. Supraglottic Laryngectomy (31367, 31368)
31420 is specifically coded for epiglottidectomy — the excision of the epiglottis as the primary target. When the surgical scope extends to a formal supraglottic laryngectomy — which includes the epiglottis AND the false vocal cords AND the aryepiglottic folds — the appropriate code is 31367 (laryngectomy; subtotal supraglottic, without radical neck dissection) or 31368 (laryngectomy; subtotal supraglottic, with radical neck dissection), not 31420. Using 31420 for a supraglottic laryngectomy significantly undercodes the service. The operative note must clearly define the anatomic extent of epiglottic tissue removed — if only the epiglottis is excised without extending to the false cords and aryepiglottic folds, 31420 is correct; if the resection encompasses all supraglottic structures, 31367/31368 apply.
✅ Procedure Includes
- Pre-operative direct laryngoscopy assessment confirming epiglottic pathology and extent of planned excision
- General anesthesia (separately billable by the anesthesia provider)
- Suspension laryngoscopy setup — rigid laryngoscope placed, patient suspension system applied, microscope or telescope set up as needed
- Epiglottic excision — partial or complete — using the selected technique (CO2 laser, cold steel, cautery, or microdebrider)
- Intraoperative hemostasis — laser, cautery, suction cautery, or packing as needed (included)
- Endoscopic assessment of the remaining supraglottic structures, glottis, and subglottis post-excision to confirm adequate removal and airway patency
- Removal of the laryngoscope and airway management during emergence
- Routine post-operative wound care instructions and dietary modification guidance (bundled in the 90-day global)
❌ Excludes / Do Not Report Together
| Code | Description | Relationship to 31420 |
|---|---|---|
| 31540 | Laryngoscopy, direct, operative, with excision of tumor and/or stripping of vocal cords or epiglottis | Separate code — 31540 covers operative laryngoscopy with tumor excision or vocal cord stripping; if the primary surgical target is a laryngeal tumor that involves the epiglottis as a secondary structure, or if vocal cord stripping is the primary procedure with incidental epiglottic work, 31540 may apply; when the epiglottis is the primary and sole surgical target, 31420 is preferred; if both an epiglottidectomy AND a vocal cord tumor excision are performed as distinct surgical objectives, evaluate whether both 31420 and 31540 are separately reportable with modifier -51 or whether 31540 subsumes the epiglottic work |
| 31541 | Laryngoscopy, direct, operative, with excision of tumor and/or stripping of vocal cords or epiglottis; with operating microscope or telescope | Same relationship as 31540 — 31541 adds the operating microscope/telescope component; evaluate primary surgical target when choosing between 31420 and 31541 |
| 31367 | Laryngectomy; subtotal supraglottic, without radical neck dissection | Mutually exclusive when the resection encompasses the full supraglottis — 31367 covers supraglottic laryngectomy inclusive of epiglottis, false vocal cords, and aryepiglottic folds; do not report 31420 for a full supraglottic laryngectomy |
| 31368 | Laryngectomy; subtotal supraglottic, with radical neck dissection | Same as 31367 — 31368 adds radical neck dissection; do not substitute 31420 for a supraglottic laryngectomy with neck dissection |
| 31530 | Laryngoscopy, direct, operative, with foreign body removal | Not related to epiglottidectomy; listed as a reminder to confirm pathology type before code selection — a foreign body in the supraglottis is reported with 31530, not 31420 |
| 31560 | Laryngoscopy, direct, operative, with arytenoidectomy | Separately reportable when arytenoidectomy is performed at the same session as epiglottidectomy — document each as a distinct, separately planned procedure; apply modifier -51 on the lower-valued code |
| E/M codes (992xx / 920xx) | Office visit or hospital visit, any level | Separately reportable only when modifier -25 is appended to the E/M code, documenting a significant, separately identifiable evaluation service; the 90-day global bundles post-operative E/M visits |
Bundling Alert — Global Period is 090 (90 days)
CPT 31420 carries a 90-day global period, meaning all routine post-operative care — wound checks, laryngoscopic surveillance of the healing epiglottic remnant, dietary management visits, and swallowing therapy coordination — is bundled for 90 days. In the oncologic population, post-operative flexible laryngoscopy for surveillance of the epiglottic surgical site during the 90-day global is bundled — it cannot be separately billed unless it constitutes an unplanned return for a complication (-78 modifier). Planned staged procedures during the global window (e.g., planned neck dissection after transoral epiglottic excision, or planned radiation planning evaluation) require modifier -58, which opens a new global period. Unrelated procedures and unrelated E/M services require -79 and -24, respectively.
🌳 Code Tree — Surgery: Respiratory System — Excision Procedures on the Larynx
CPT 31300-31420 Excision Procedures on the Larynx
│
├── 31300 Laryngotomy (thyrotomy, laryngofissure); with removal of tumor or laryngocele, cordectomy (Global: 090)
├── 31320 Laryngotomy (thyrotomy, laryngofissure); diagnostic (Global: 090)
│
├── 31360 Laryngectomy; total, without radical neck dissection (Global: 090)
├── 31365 Laryngectomy; total, with radical neck dissection (Global: 090)
├── 31367 Laryngectomy; subtotal supraglottic, without radical neck dissection (Global: 090)
├── 31368 Laryngectomy; subtotal supraglottic, with radical neck dissection (Global: 090)
├── 31370 Partial laryngectomy (hemilaryngectomy); horizontal (Global: 090)
├── 31375 Partial laryngectomy (hemilaryngectomy); laterovertical (Global: 090)
├── 31380 Partial laryngectomy (hemilaryngectomy); anterovertical (Global: 090)
├── 31382 Partial laryngectomy (hemilaryngectomy); antero-latero-vertical (Global: 090)
│
├── 31390 Pharyngolaryngectomy, without radical neck dissection (Global: 090)
├── 31395 Pharyngolaryngectomy, with radical neck dissection (Global: 090)
│
├── 31400 Arytenoidectomy or arytenoidopexy, external approach (Global: 090)
│
└── ▶▶ 31420 ◀◀ Epiglottidectomy ← YOU ARE HERE (Global: 090)
💰 RVU & Reimbursement Profile
| Component | Value |
|---|---|
| Work RVU (wRVU) | 5.67 (verify against current CMS MPFS for applicable year; subject to CY2026 efficiency adjustment) |
| Non-Facility PE RVU | ~5.48 (verify against CMS RVU26A) |
| Malpractice RVU | ~0.65 |
| Non-Facility Total RVU | ~11.80 (verify against CMS RVU26A) |
| Global Period | 090 (90 days) |
| Bilateral Indicator | 0 — Not a bilateral procedure; the epiglottis is a single midline structure; bilateral indicator 0 means standard bilateral reduction rules do not apply; modifier -50 is never appropriate for 31420 |
| Assistant Surgeon | ✅ Payable — modifier -80 (or -82 when qualified resident not available); document medical necessity; commonly appropriate for oncologic cases or patients with difficult airway access requiring concurrent airway management |
| Co-Surgeon | ✅ Applicable — modifier -62 when two surgeons of different specialties perform distinct non-overlapping components concurrently — e.g., head and neck oncology surgeon performing epiglottidectomy while general ENT manages airway in complex oncologic resection |
| Team Surgery | ✅ Potentially applicable for complex oncologic cases — modifier -66; document medical necessity for team approach |
| PC/TC Split | ❌ No — Procedure code only (Indicator 0) |
| Modifier -51 Exempt | No — Subject to multiple procedure reduction rules when billed with other surgical procedures same session |
| Anesthesia | General anesthesia is required — endotracheal intubation (standard or laser-safe tube depending on technique) or jet ventilation; separately billable by the anesthesia provider under CPT 00320 (anesthesia for procedures on larynx, trachea in patients 1 year or older) or 00326 (anesthesia for all procedures on the larynx, trachea in patient under 1 year, except endoscopy); surgeon does NOT separately bill for anesthesia |
🏷️ Modifier Reference
| Modifier | Name | When to Apply |
|---|---|---|
| -22 | Increased Procedural Services | When the epiglottidectomy required substantially greater work than typical — e.g., bulky epiglottic tumor with difficult exposure, post-radiation fibrosis requiring extensive dissection, prior surgical distortion of laryngeal anatomy, markedly prolonged operative time; operative note must document specific complexity factors; attach cover letter to claim |
| -25 | Significant, Separately Identifiable E/M | Applied to the E/M code — not 31420 — when a significant, separately identifiable evaluation is performed same date; the 90-day global means same-day and post-operative E/M visits are bundled |
| -24 | Unrelated E/M During Postoperative Period | Applied to the E/M code when the patient returns within the 90-day global window for a condition unrelated to the epiglottidectomy; document the unrelated nature explicitly |
| -51 | Multiple Procedures | When 31420 is performed alongside other separately reportable surgical procedures at the same session — e.g., concurrent 31540 (operative laryngoscopy), 31560 (arytenoidectomy), neck dissection codes, or tracheotomy; apply -51 to the lower-valued code |
| -52 | Reduced Services | Procedure partially completed — e.g., only a minimal portion of the epiglottis was excised due to patient condition, anatomic constraints, or revised surgical plan; document extent of tissue removed and reason for reduced scope |
| -53 | Discontinued Procedure | Procedure started but discontinued due to extenuating circumstances threatening patient well-being — e.g., desaturation, cardiac event, airway emergency during induction; document the specific reason for discontinuation |
| -54 | Surgical Care Only | Surgeon performs the epiglottidectomy but post-operative care is transferred to another provider (e.g., patient returns home to a different geographic region for follow-up); the 90-day global is split; both providers coordinate claims |
| -55 | Postoperative Management Only | Provider assuming post-operative care during the 90-day global after surgery was performed by a different surgeon |
| -58 | Staged or Related Procedure | Planned staged procedure during the 90-day global — e.g., planned post-excision radiation therapy planning visit requiring a surgical procedure, planned neck dissection staged after transoral resection, or planned secondary airway procedure; opens a new global period |
| -59 | Distinct Procedural Service | When 31420 is performed alongside a procedure at a genuinely distinct anatomic site that payers may bundle; documents independent clinical service |
| -XS | Separate Structure | Preferred over -59 when the distinct service involves a clearly separate anatomic structure — e.g., 31420 alongside a concurrent palate or pharyngeal procedure |
| -62 | Two Surgeons | When two surgeons of different specialties each perform distinct, non-overlapping portions concurrently — e.g., head and neck oncology surgeon performing epiglottic resection while ENT airway surgeon manages laryngeal access and airway in a complex oncologic case; both surgeons append -62 and document their distinct contributions |
| -66 | Surgical Team | Complex oncologic cases requiring a full surgical team — rare for isolated epiglottidectomy but applicable when combined with major reconstructive head and neck procedures |
| -76 | Repeat Procedure by Same Physician | Repeat epiglottidectomy for recurrent disease, re-excision for positive margins, or repeat procedure for regrowth by the original surgeon; document clinical indication |
| -77 | Repeat Procedure by Different Physician | Repeat procedure by a different surgeon |
| -78 | Unplanned Return to OR | Unplanned return for complication during the 90-day global — e.g., post-operative supraglottic edema requiring re-intervention, hemorrhage, wound dehiscence, or airway emergency |
| -79 | Unrelated Procedure During Postoperative Period | Unrelated surgical procedure during the 90-day global window |
| -80 | Assistant Surgeon | When an assistant surgeon participates — document medical necessity; particularly appropriate for complex oncologic resections or patients with difficult airway |
| -81 | Minimum Assistant Surgeon | Minimal assistant surgeon participation required |
| -82 | Assistant Surgeon When Qualified Resident Not Available | Teaching hospital setting where a qualified resident is not available |
🩺 Common ICD-10-CM Pairings
Infectious / Inflammatory — Primary Diagnoses
| ICD-10 Code | Description | HCC? | Clinical Notes |
|---|---|---|---|
| J05.10 | Acute epiglottitis without obstruction | ❌ No | Use when acute epiglottitis is the primary diagnosis and epiglottidectomy is performed for recurrent or structurally complicated disease; J05.10 = no documented airway obstruction; confirm the distinction between acute and recurrent in the documentation |
| J05.11 | Acute epiglottitis with obstruction | ❌ No | Use when acute epiglottitis is complicated by documented airway obstruction requiring surgical intervention; the obstruction detail is a clinically significant specificity requirement — document it explicitly |
| J04.30 | Supraglottitis, unspecified, without obstruction | ❌ No | Use for supraglottitis that is not specifically identified as epiglottitis — supraglottitis involves the broader supraglottic region; J04.30 = no obstruction; confirm the distinction between supraglottitis and epiglottitis (epiglottis specifically vs. supraglottic region broadly) in the clinical record |
| J04.31 | Supraglottitis, unspecified, with obstruction | ❌ No | Use when supraglottitis is complicated by documented airway obstruction; the obstruction subclassification is a medical necessity specificity requirement; do not default to “without obstruction” unless obstruction is explicitly ruled out |
Oncologic Diagnoses
| ICD-10 Code | Description | HCC? | Clinical Notes |
|---|---|---|---|
| C32.1 | Malignant neoplasm of supraglottis | ✅ HCC | Most commonly paired oncologic diagnosis for 31420 — use when epiglottidectomy is performed for supraglottic carcinoma (the epiglottis is part of the supraglottis); confirm histologic type (typically SCC) from pathology; document clinical and pathologic stage for complete coding (TNM staging codes may be assigned as secondary) |
| C10.1 | Malignant neoplasm of anterior surface of epiglottis | ✅ HCC | Use specifically when the tumor arises from the anterior (lingual) surface of the epiglottis — this is coded to the oropharynx (C10.x), not the larynx (C32.x); the posterior (laryngeal) surface maps to C32.1; distinguish based on the tumor’s surface of origin as documented in the pathology report and operative note; anterior surface epiglottis tumors are oropharyngeal per ICD-10 topography |
| D14.1 | Benign neoplasm of larynx | ❌ No | Use for benign laryngeal neoplasms involving the epiglottis — e.g., epiglottic papilloma, fibroma, or other benign epiglottic mass; confirm the benign nature from the pathology report before assigning; do not code suspected malignancy as benign |
Structural and Functional Disorders
| ICD-10 Code | Description | HCC? | Clinical Notes |
|---|---|---|---|
| J38.7 | Other diseases of larynx | ❌ No | Use for epiglottic cysts (mucous retention cysts, ductal cysts), epiglottic edema, post-radiation epiglottic fibrosis, or other epiglottic structural disorders not covered by more specific codes; this is a broad code — document the specific epiglottic condition in the clinical record even though the ICD-10 code does not distinguish |
| G47.33 | Obstructive sleep apnea (adult) | ❌ No | Use as primary or secondary diagnosis when epiglottidectomy is performed for OSA with documented epiglottic collapse on DISE (drug-induced sleep endoscopy); document the AHI, DISE findings (epiglottic collapse pattern), CPAP failure/intolerance, and the epiglottic collapse as the surgical target |
| Q31.5 | Congenital laryngomalacia | ❌ No | Use for pediatric patients undergoing epiglottidectomy (as part of supraglottoplasty) for congenital laryngomalacia; confirm the congenital designation and the specific anatomic contributors (omega epiglottis, redundant aryepiglottic folds, prolapsing arytenoids) addressed at surgery; document severity (mild/moderate/severe) and failure of conservative management |
| R13.10 | Dysphagia, unspecified | ❌ No | Use as primary or secondary diagnosis when dysphagia is the primary functional indication for epiglottidectomy — document the specific dysphagia pattern (oropharyngeal vs. esophageal) and swallowing study results; query for a more specific dysphagia code (R13.19) when the pattern is characterized |
| R13.19 | Other dysphagia | ❌ No | Use when the specific dysphagia pattern (oropharyngeal, pharyngoesophageal, neurogenic) is documented; more specific than R13.10 and preferred when the clinical record characterizes the dysphagia type |
Coding Specificity Reminder
The most critical ICD-10-CM specificity decision for 31420 pairings is distinguishing epiglottitis (J05.10/J05.11) from supraglottitis (J04.30/J04.31) — clinicians sometimes use these terms interchangeably, but ICD-10-CM requires specificity: epiglottitis specifically involves the epiglottis, while supraglottitis involves the broader supraglottic region. Query the provider if the documentation is ambiguous. For oncologic diagnoses, the distinction between anterior surface epiglottis (C10.1 — oropharynx) and posterior surface/supraglottis (C32.1 — larynx) has major implications for staging, treatment planning, and reimbursement — always confirm the tumor surface of origin from the operative and pathology reports. The obstruction qualifier (J05.10 vs. J05.11; J04.30 vs. J04.31) is a medical necessity documentation requirement — do not default to “without obstruction” without explicit documentation.
🏥 MS-DRG Considerations (Inpatient)
Inpatient Coding Reminder
CPT 31420 maps to MDC 03 for benign and infectious indications, grouping to DRG 133/134/135 (Other Ear, Nose, Mouth and Throat O.R. Procedure with MCC/CC/without CC/MCC). For oncologic cases (principal diagnosis C32.1 or C10.1), the DRG assignment may shift to the head and neck cancer DRG tiers with higher base weights — confirm with your facility’s DRG grouper. In the pediatric population (laryngomalacia with supraglottoplasty), the admission is often same-day or 23-hour observation; inpatient admission is warranted only when post-operative airway management requires a higher level of care (intubation, ICU monitoring). Concurrent diagnoses most likely to qualify as CC or MCC in the inpatient setting: aspiration pneumonia (J69.0 — MCC), sepsis from epiglottitis (A41.9 or organism-specific — MCC), malnutrition from severe dysphagia (E43 — MCC), and respiratory failure (J96.01 — MCC). CDI querying should focus on the severity of any concurrent airway compromise, nutritional status, and infectious complications.
🔧 ICD-10-PCS Equivalents (Inpatient Facility Coding)
Note
Inpatient PCS coding for 31420 hinges on the extent of epiglottic tissue removed: Excision (B) is used when only a portion of the epiglottis is removed (partial epiglottidectomy); Resection (T) is used when the entire epiglottis is removed (total epiglottidectomy). Per PCS Guidelines B3.8, when the root operations Excision and Resection are both possible based on the documentation, the extent of tissue removal as documented in the operative note determines the correct root operation — partial removal = Excision, complete removal = Resection. The body part value is S (Epiglottis) in the Mouth and Throat body system (C). The approach is Percutaneous Endoscopic (4) for direct laryngoscopic access (laryngoscope provides the endoscopic visualization), or Via Natural or Artificial Opening Endoscopic (8) when the endoscope is introduced through the oral/natural airway.
| PCS Code | Full Description | Applicable Scenario |
|---|---|---|
0CBS4ZZ | Excision of Epiglottis, Percutaneous Endoscopic Approach, No Device, No Qualifier | Partial epiglottidectomy (excision of a portion of the epiglottis) — root operation Excision (B); Percutaneous Endoscopic approach via suspension laryngoscopy |
0CBS8ZZ | Excision of Epiglottis, Via Natural or Artificial Opening Endoscopic, No Device, No Qualifier | Partial epiglottidectomy via flexible endoscopic or natural oral opening approach — less common; confirm approach documentation |
0CTS4ZZ | Resection of Epiglottis, Percutaneous Endoscopic Approach, No Device, No Qualifier | Total epiglottidectomy (complete removal of the epiglottis) — root operation Resection (T); Percutaneous Endoscopic approach |
0CTS8ZZ | Resection of Epiglottis, Via Natural or Artificial Opening Endoscopic, No Device, No Qualifier | Total epiglottidectomy via natural opening endoscopic approach |
PCS Character Analysis — 0CBS4ZZ (Partial Epiglottidectomy)
| Position | Character | Value | Definition |
|---|---|---|---|
| 1 | Section | 0 | Medical and Surgical |
| 2 | Body System | C | Mouth and Throat |
| 3 | Root Operation | B | Excision (cutting out or off, without replacement, a portion of a body part — partial epiglottidectomy; some epiglottic tissue remains) |
| 4 | Body Part | S | Epiglottis |
| 5 | Approach | 4 | Percutaneous Endoscopic (instrumentation introduced through the skin or mucous membrane and body layers — here, through the oral cavity via the suspension laryngoscope — with endoscopic visualization) |
| 6 | Device | Z | No Device |
| 7 | Qualifier | Z | No Qualifier (use X = Diagnostic when a biopsy/specimen only, not therapeutic excision — confirm qualifier intent based on clinical purpose) |
PCS Qualifier: Z (No Qualifier) vs. X (Diagnostic)
- Use qualifier Z (No Qualifier) when the epiglottidectomy is therapeutic — the intent is to treat the epiglottic pathology (remove a cyst, treat a tumor, relieve obstruction)
- Use qualifier X (Diagnostic) only when the excision is performed solely to obtain a specimen for pathologic diagnosis (i.e., a biopsy) with no therapeutic intent
- For most 31420 epiglottidectomy cases, qualifier Z is correct — the procedure is therapeutic
- Per PCS Guideline B3.4a, the qualifier X is used only when excision is the sole intent of obtaining tissue for diagnosis; if the same procedure both removes tissue and treats the condition, qualifier Z applies
📝 Coding Examples
Example 1 — ASC: Partial Epiglottidectomy for Large Epiglottic Mucous Retention Cyst
Clinical Scenario: A 48-year-old male presents with an 8-month history of progressive globus sensation, dysphagia to solids, and mild exertional stridor. Flexible laryngoscopy in the office confirms a large (approximately 2.5 cm) mucous retention cyst on the lingual (anterior) surface of the epiglottis causing partial obstruction of the laryngeal inlet at rest. He is taken to the ASC under general anesthesia with an oral RAE endotracheal tube. Suspension laryngoscopy is performed. The epiglottic cyst is marsupialized and the superior 50% of the epiglottis is excised using CO2 laser (partial epiglottidectomy). The cyst wall is sent to pathology. Hemostasis is achieved with laser. The remainder of the supraglottis, glottis, and subglottis are visually normal. The operative note documents: “Partial epiglottidectomy performed via CO2 laser microlaryngoscopy; superior 50% of epiglottis and overlying cyst excised; cyst wall and epiglottic margin sent to pathology; hemostasis achieved.”
| Field | Code | Rationale |
|---|---|---|
| CPT | 31420 | Epiglottidectomy — partial excision of the epiglottis via CO2 laser direct laryngoscopy; operative note confirms excision of the epiglottis as the primary procedure; laser technique does not change the code |
| PDx | J38.7 | Other diseases of larynx — epiglottic mucous retention cyst; no specific ICD-10-CM code exists for epiglottic cyst; J38.7 is the most appropriate code; document cyst type and size in the clinical record |
| SDx | R13.10 | Dysphagia, unspecified — dysphagia is a documented secondary symptom driving surgical intervention; supports medical necessity |
Note
If the pathology report confirms a benign lesion, code D14.1 (benign neoplasm of larynx) may be assigned instead of or in addition to J38.7 depending on the pathologic diagnosis — confirm the pathologic characterization before finalizing the ICD-10-CM code assignment. If the report characterizes the specimen as a mucous retention cyst (not a neoplasm), J38.7 remains the most appropriate code.
Example 2 — Outpatient Hospital: Epiglottidectomy for Supraglottic SCC, Modifier 22 + Concurrent Neck Dissection
Clinical Scenario: A 61-year-old male with a 3.5 cm supraglottic squamous cell carcinoma involving the entire epiglottis (lingual and laryngeal surfaces) and the right aryepiglottic fold presents for transoral laser microsurgery (TLM) epiglottidectomy and concurrent right selective neck dissection (levels II-IV). Under general anesthesia with jet ventilation, the surgeon performs CO2 laser epiglottidectomy with complete excision of the epiglottis, right aryepiglottic fold, and margins into the right false cord — operative time for the epiglottidectomy and supraglottic component is 2 hours 45 minutes due to the extent of the lesion, significant neovascularization, and the need for multiple laser passes for hemostasis. The operative note explicitly documents: “Complete epiglottidectomy and right aryepiglottic fold excision via CO2 laser TLM; total operative time for TLM component 2h45m; significantly increased complexity due to tumor bulk, extensive neovascularization, and need for wide-field hemostasis.” A separate surgical team simultaneously performs right selective neck dissection levels II-IV.
| Field | Code | Rationale |
|---|---|---|
| CPT 1 | 31420--22 | Epiglottidectomy — complete; modifier -22 = substantially increased complexity: large tumor (3.5 cm), complete epiglottis + right AEF excision, extensive neovascularization, 2h45m operative time for TLM; attach operative note and cover letter documenting specific complexity factors |
| CPT 2 | 38746--51 | Thoracic lymph node excision — confirm the specific neck dissection CPT code (e.g., 38724 for modified radical neck dissection or the appropriate selective neck dissection code); -51 on the lower-valued code; if concurrent surgeons, evaluate -62 |
| PDx | C32.1 | Malignant neoplasm of supraglottis — confirmed SCC of the supraglottis/epiglottis (laryngeal surface); HCC code; document clinical stage in the record |
Warning
Confirm whether the extent of resection (complete epiglottis + right aryepiglottic fold + right false cord) has crossed the threshold from epiglottidectomy (31420) into subtotal supraglottic laryngectomy (31367). If the resection encompasses the full supraglottis — epiglottis, false vocal cords, aryepiglottic folds, and pre-epiglottic space — 31367 is more appropriate and better compensates the extent of work. The decision is driven by the documented anatomic extent of the resection — query the surgeon if the operative note is ambiguous about the margins and structures removed.
Example 3 — Outpatient Hospital: Supraglottoplasty for Severe Laryngomalacia in a Pediatric Patient
Clinical Scenario: A 4-month-old female presents with severe laryngomalacia — confirmed by flexible nasolaryngoscopy showing complete inspiratory collapse of the supraglottis including an omega-shaped epiglottis falling posteriorly, redundant aryepiglottic folds, and prolapsing arytenoid mucosa — causing significant inspiratory stridor, oxygen desaturations during feeding, and failure to thrive (weight < 3rd percentile). After failed conservative management, the pediatric ENT performs supraglottoplasty under general anesthesia: (1) bilateral aryepiglottic fold division with powered microdebrider, (2) partial epiglottidectomy — trimming the superior epiglottic margin to reduce the omega configuration. The operative note documents each component distinctly: “Bilateral aryepiglottic fold division performed; partial epiglottidectomy of superior epiglottic margin performed to address omega configuration.”
| Field | Code | Rationale |
|---|---|---|
| CPT 1 | 31420 | Partial epiglottidectomy — trimming of the superior epiglottic margin as the epiglottic component of supraglottoplasty; operative note explicitly documents the epiglottic excision as a distinct component |
| CPT 2 | 31540--51 | Laryngoscopy, direct, operative, with excision of tumor and/or stripping — used to capture the bilateral aryepiglottic fold division component of the supraglottoplasty; confirm the most appropriate code for AEF division at the time of billing; -51 on the lower-valued code; verify NCCI edit status for 31420 + 31540 together |
| PDx | Q31.5 | Congenital laryngomalacia — primary diagnosis driving the supraglottoplasty; confirm severe designation in the clinical record (failure to thrive, desaturations) |
| SDx | R63.3 | Feeding difficulties — failure to thrive from feeding difficulties is documented; supports medical necessity for surgical intervention |
Note
The CPT coding for supraglottoplasty is one of the most commonly debated coding scenarios in pediatric otolaryngology because no single CPT code is dedicated to the complete procedure. The general approach — reporting 31420 for the epiglottic trim and the appropriate laryngoscopy code for the aryepiglottic fold division — is commonly used but should be confirmed against current NCCI edits and your MAC’s LCD for pediatric airway procedures before submission. Some coders report only 31420 for the entire supraglottoplasty; others report 31420 + 31540/31541; confirm the current NCCI edit status and payer policy in your jurisdiction.
⚠️ Common Coding Pitfalls
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Using 31420 for a full supraglottic laryngectomy (which should be 31367 or 31368): The most significant overcoding/undercoding boundary for 31420 is the distinction between epiglottidectomy (removing only the epiglottis) and subtotal supraglottic laryngectomy (removing the epiglottis + false vocal cords + aryepiglottic folds + pre-epiglottic space). 31420 undercodes a full supraglottic resection. 31367/31368 have significantly higher wRVU values reflecting the greater extent of work. The operative note must define the anatomic extent of the resection — every structure removed must be documented — so the coder can accurately determine which code applies. When the documentation is ambiguous, query the surgeon before coding.
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Confusing 31420 with 31540 for epiglottic tumor excision: 31540 (operative laryngoscopy with excision of tumor and/or stripping of vocal cords or epiglottis) is frequently confused with 31420 in the oncologic setting. The key distinction: 31420 is the standalone epiglottidectomy code where the epiglottis is the primary and named surgical target; 31540 is used when operative laryngoscopy involves tumor excision or cord stripping where the epiglottis may be one of several structures addressed. Review the primary surgical objective and the narrative of the operative note — not just the discharge summary — to confirm which code better represents the service.
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Failing to use modifier -22 for complex oncologic epiglottidectomies: Large supraglottic tumors with significant neovascularization, difficult laryngoscopic exposure, post-radiation tissue planes, or markedly extended operative time all justify modifier -22 on 31420. Many ENT coders omit -22 because they default to the standard code without assessing complexity. Educate surgeons to routinely document: tumor size, specific challenges encountered (neovascularization, tissue plane distortion, restricted laryngoscopic view), extent of resection beyond the standard epiglottis, and total operative time for the primary procedure — all of which are the building blocks of a defensible -22 claim.
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Not applying modifier -51 when concurrent laryngeal or head and neck procedures are performed: epiglottidectomy is frequently performed alongside other procedures — neck dissection, concurrent vocal cord procedures, or pharyngeal procedures. Each separately reportable concurrent procedure requires modifier -51 on the lower-valued code. Omitting -51 on the secondary procedure may result in bundled or reduced payment without the modifier-directed payment calculation. Conversely, failing to report the concurrent procedures at all (e.g., not billing for the neck dissection) is a significant revenue gap.
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Using J05.10 when J05.11 (with obstruction) is documented: The obstruction subclassification in epiglottitis and supraglottitis ICD-10-CM codes is a medical necessity specificity requirement — not optional. Airway obstruction from epiglottitis is the primary driver of the surgical indication for epiglottidectomy in the infectious setting. When the clinical record documents stridor, respiratory distress, or endoscopic confirmation of airway narrowing, J05.11 (with obstruction) is required. Defaulting to J05.10 (without obstruction) when obstruction is documented — or when the documentation is ambiguous — is a specificity gap that may affect medical necessity reviews. Query the provider when the obstruction status is not explicitly stated.
📎 Sources
AMA CPT 2025 Professional Edition · 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 · NCCI Policy Manual Chapter 5 (Respiratory System — Larynx), CMS 2024-2025 · ICD-10-CM Official Guidelines for Coding and Reporting FY2025 · ICD-10-PCS Official Guidelines for Coding and Reporting FY2025 · AAPC CPT Code 31420 — Excision Procedures on the Larynx (AAPC Codify, December 2023) · AAPC CPT Code Range 31300-31420 — Excision Procedures on the Larynx (AAPC, August 2024) · AAO-HNS CPT for ENT: Laryngoscopy — Operative Laryngoscopy Code Guidance (American Academy of Otolaryngology - Head and Neck Surgery, reviewed 2025) · GenHealth AI — CPT 31420 Clinical Description and ICD-10 Pairing Reference (2024) · MD Clarity — CPT 31420 Modifier and Reimbursement Reference (2024) · NIH VSAC Code Systems — CPT 31420 Descriptor Verification (NLM, 2020) · Noridian Medicare JE Part B — MPFS Indicator Descriptors (Global Period, Bilateral Indicator, and Assistant Surgeon Reference)