Crystal's MCW Coder Hub👩🏾⚕️CPT Code 31241 — Nasal/Sinus Endoscopy, Surgical; with Ligation of Sphenopalatine Artery
Full Description
CPT 31241 describes a surgical nasal/sinus endoscopy in which the surgeon formally identifies, dissects, isolates, and ligates the sphenopalatine artery (SPA) and/or its branches under direct endoscopic visualization to control severe, recurrent, or refractory posterior epistaxis. This is a distinct, technically demanding procedure that goes substantially beyond simple endoscopic cauterization (CPT 31238) and requires a structured operative approach involving mucoperiosteal flap elevation, anatomic landmark identification, foramen dissection, and vessel clipping.
CPT 31241 was introduced as a new code in January 2018 by the AMA, specifically to capture the formal endoscopic SPA ligation technique — a procedure that had been growing in clinical adoption since the late 1990s but lacked its own dedicated code. Prior to 2018, coders typically used 31238 (endoscopic hemorrhage control) for these cases, which dramatically undervalued the work involved. The 2018 introduction of 31241 corrected this and assigned a substantially higher wRVU (8.00) reflecting the true complexity of the procedure.
The Gold Standard for Posterior Epistaxis: TESPAL (Transnasal Endoscopic Sphenopalatine Artery Ligation) is now widely considered the surgical gold standard for controlling intractable posterior epistaxis. Compared to the older transantral internal maxillary artery ligation (CPT 30920, Caldwell-Luc approach), endoscopic SPA ligation offers:
- Equivalent or superior success rates (87-95%)
- Lower morbidity (no facial/gingival incision, no maxillary sinus entry)
- Shorter operative time
- Lower risk of infraorbital nerve injury and oroantral fistula
- Same-day or next-day discharge in most cases
As a result, 30920 has largely been reserved for cases where endoscopic access is not feasible or has failed, and 31241 has become the dominant surgical epistaxis code in modern ENT practice.
Note
Dual Indication: In addition to hemorrhage control, 31241 may also be performed during or prior to tumor resection (e.g., juvenile nasopharyngeal angiofibroma) to devascularize the surgical field by interrupting the primary arterial supply before tumor removal.
Operative Technique — What Must Be Documented for 31241
The following operative steps distinguish 31241 from 31238 and must be clearly described in the operative report to support the higher-value code:
- Nasal decongestion and endoscopic survey — standard diagnostic survey of the nasal cavity with the endoscope to confirm posterior bleeding and assess anatomy
- Posterior attachment of the middle turbinate identification — the crista ethmoidalis serves as the primary surgical landmark for the sphenopalatine foramen
- Mucoperiosteal flap elevation — a flap of mucosa and periosteum is elevated from the posterior lateral nasal wall, posterior to the crista ethmoidalis, to expose the underlying bone and foramen
- Crista ethmoidalis identification — the bony landmark directly anterior to the sphenopalatine foramen is identified
- Sphenopalatine foramen dissection — the foramen is opened or the surrounding bone is drilled/removed as needed to expose the SPA at its entry point into the nasal cavity
- SPA and branch identification — the artery (and typically its two major branches: posterior lateral nasal artery and posterior septal artery) are isolated
- Clip or suture ligation — endoscopic clips (e.g., titanium hemostatic clips) are applied to the SPA and each identifiable branch; cautery may be used in addition
- Hemostasis confirmation — the nasal cavity is inspected under endoscopic visualization to confirm cessation of bleeding
- Mucoperiosteal flap replacement — the elevated flap is repositioned; sutures or packing may be used
Note
Documentation Critical Point: If the operative note does not describe mucoperiosteal flap elevation, crista ethmoidalis identification, foramen dissection, and clip ligation of the SPA and/or its branches, the claim does not support 31241. Code 31238 would be correct in that scenario. This distinction is an active area of scrutiny in ENT audits.
Anatomic Context
External Carotid Artery
│
└── Internal Maxillary Artery (IMA)
│ (passes through pterygomaxillary fissure into
│ pterygopalatine fossa)
│
└── Sphenopalatine Artery (SPA) ◄── Target of CPT 31241
│ (exits nasal cavity via sphenopalatine foramen,
│ just posterior to crista ethmoidalis,
│ posterior attachment of middle turbinate)
│
├── Posterior Lateral Nasal Artery
│ (supplies lateral nasal wall, turbinates)
│
└── Posterior Septal Artery
(supplies posterior nasal septum,
Woodruff's plexus — posterior bleed zone)
Collateral Supply (NOT controlled by 31241):
├── Anterior Ethmoid Artery (branch of ophthalmic/internal carotid)
└── Posterior Ethmoid Artery (branch of ophthalmic/internal carotid)
→ These are addressed by CPT 30915 (ethmoid artery ligation)
if SPA ligation fails to control bleeding
Note
Understanding collateral circulation is critical for coding recurrent cases: if bleeding recurs after 31241, the ethmoid arteries (internal carotid territory) must be considered, and 30915 (ethmoid ligation) or 61626 (embolization) may be the next procedural step.
Code Family / Code Tree
Epistaxis / Nasal Hemorrhage — Escalating Complexity
│
├── CONSERVATIVE (Non-Endoscopic)
│ ├── 30901 - Anterior epistaxis, simple; Global: 000
│ ├── 30903 - Anterior epistaxis, complex; Global: 000
│ ├── 30905 - Posterior epistaxis, initial; Global: 000
│ └── 30906 - Posterior epistaxis, subsequent; Global: 000
│
├── ENDOSCOPIC
│ ├── 31238 - Nasal/sinus endoscopy, surgical;
│ │ with control of nasal hemorrhage
│ │ (cautery/packing only, no formal dissection)
│ │ wRVU: ~3.21 | Global: 000
│ │
│ └── 31241 ◄ YOU ARE HERE
│ Nasal/sinus endoscopy, surgical;
│ with ligation of sphenopalatine artery
│ (formal dissection, flap, foramen exposure,
│ clip ligation of SPA and branches)
│ wRVU: 8.00 | Global: 000
│ Introduced: 2018
│
├── OPEN SURGICAL
│ ├── 30915 - Ligation arteries; ethmoidal arteries
│ │ (open medial canthal approach)
│ │ Global: 090
│ │
│ └── 30920 - Ligation arteries; internal maxillary
│ artery, transantral (Caldwell-Luc)
│ Global: 090
│
└── INTERVENTIONAL RADIOLOGY
└── 61626 - Transcatheter permanent occlusion/embolization,
non-CNS (head/neck arterial embolization)
Used when surgical approaches fail or are
contraindicated (coagulopathy, failed prior surgery,
angiofibroma devascularization)
Clinical Escalation Pathway:
30901/30903 → 30905 → 30906 → 31238 → 31241 → 30915 or 61626 → 30920
Nasal Endoscopy Base Code Rule
Like 31238, CPT 31241 is a surgical endoscopy that inherently includes the diagnostic survey of the nasal cavity. The base endoscopy code (31231) is always bundled into 31241 by NCCI and cannot be separately billed on the same date for the same session. When multiple FESS-family surgical endoscopy codes are performed together:
- Each additional code is valued at its full amount minus the base endoscopy RVU value (~1.82 wRVU for 31231)
- This prevents double-counting of the diagnostic survey shared across multiple procedures
Includes (Bundled — Do NOT Bill Separately)
The following are integral to CPT 31241 and are not separately reportable when performed as part of the same SPA ligation session:
- Diagnostic nasal endoscopy (31231) — inherently included per NCCI
- All nasal decongestion, topical anesthetic, and vasoconstrictive agent application
- Endoscopic survey and identification of bleeding source prior to dissection
- Mucoperiosteal flap elevation and replacement
- Bone removal or drilling at the sphenopalatine foramen area to access the vessel
- Identification and dissection of SPA and its branches
- Application of endoscopic clips and/or cauterization of the SPA
- Intraoperative packing placed to assist with hemorrhage control during the procedure
- Post-procedure nasal packing placed at the time of the procedure
- Standard post-procedure care (within the 000-day global window)
- Any endoscopic cauterization of smaller bleeding vessels encountered as part of the same hemorrhage control effort
Excludes / Cannot Bill With (Same Side, Same Session)
| Code | Reason |
|---|---|
| 31231 (Diagnostic nasal endoscopy) | Bundled by NCCI — cannot bill separately on same date/side as 31241 |
| 31238 (Endoscopic hemorrhage control) | Do not bill both 31238 and 31241 for the same side on the same date; 31241 subsumes the cautery-level work — select the most definitive code |
| 30920 (Transantral IMA ligation) | Do not bill 31241 and 30920 for the same bleeding episode on the same day — select the definitive procedure |
| 30901, 30903, 30905, 30906 | Prior conservative attempts on the same date are bundled into 31241; if conservative management and definitive ligation occur on the same date, bill only 31241 |
Important
Exception — 30915 (Ethmoid Artery Ligation) at the Same Session: If the surgeon performs both endoscopic SPA ligation (31241) AND ethmoid artery ligation (30915) during the same operative session for refractory bilateral hemorrhage (SPA territory + ethmoid territory both actively bleeding), both codes may be separately reportable. Append Modifier -51 (Multiple Procedures) to the lower-value code. The operative report must document each vessel as a distinct ligation site with specific operative steps described for each.
Exception — Bilateral 31241: If bilateral SPA ligation is performed (both sides, same session), report 31241-50 (bilateral) or two line items with -LT and -RT per individual payer policy. Medicare generally accepts Modifier -50 on a single line at 150% of the unilateral rate.
Exception — 31241 with Concurrent FESS: When SPA ligation is performed in addition to planned FESS procedures (e.g., sinusotomy, polypectomy), the codes may be separately reportable. The base endoscopy deduction rule applies: each additional surgical endoscopy code is reduced by the base (31231) value. Modifier -51 signals multiple procedures. Full documentation of each distinct surgical step is required.
Assistant at Surgery
| Indicator | Value |
|---|---|
| Medicare Assistant Surgeon Payable | Yes — Indicator 2 |
| CMS Payment Rate (Physician, MD/DO) | 16% of the MPFS allowable for 31241 |
| CMS Payment Rate (NP/PA/CNS as assistant) | 85% of the 16% MPFS amount |
| Applicable Modifiers | -80 (MD/DO full assist), -81 (Minimum assist), -82 (No qualified resident, teaching hospital), -AS (PA/NP/CNS assistant) |
Important
CPT 31241 carries an MPFS assistant-at-surgery indicator of “2”, meaning Medicare will pay for an assistant surgeon when the procedure is supported by documentation. The operative note must clearly describe the conditions that made an assistant necessary — for example, difficulty with anatomic visualization, profuse intraoperative hemorrhage obscuring the field, concurrent procedures requiring two-handed instrumentation, or patient anatomy factors (prior surgery, severe scarring, polyp burden).
Per AAPC guidance, the assistant surgeon’s need should be summarized in the findings paragraph at the beginning of the operative note and elaborated in the body of the note. Billing an assistant modifier without this documentation is a common audit target.
Teaching Hospital Note:
If 31241 is performed at a teaching hospital that has an ENT/otolaryngology training program with a qualified resident available, Medicare does NOT pay for an attending physician assistant (-80). In this scenario, the resident serves as the assistant and no separate assistant surgeon payment is made. If no qualified resident is available, Modifier -82 is appended and payment may be authorized.
wRVU and Reimbursement
| Component | Non-Facility | Facility |
|---|---|---|
| Work RVU (wRVU) | 8.00 | 8.00 |
| Practice Expense RVU | ~4.40 | ~1.45 |
| Malpractice RVU | ~1.40 | ~1.05 |
| Total RVU (approx.) | ~13.80 | ~10.50 |
| Medicare National Rate (est.) | ~510 | ~390 |
| Typical Commercial Rate Range | 1,400 | 1,100 |
Important
CY 2026 PE Methodology Note: CMS finalized a 50% reduction in the portion of indirect PE RVUs allocated based on work RVUs for facility-based services in 2026. This redistribution reduced facility-setting reimbursement across all ENT endoscopy codes while modestly increasing non-facility rates. The above facility RVU total reflects the post-2026 adjustment. The 2026 CMS Conversion Factor is approximately $33.40. GPCI locality adjustments apply.
Comparative wRVU Context (Epistaxis Code Family):
| Code | Description | wRVU |
|---|---|---|
| 30901 | Anterior epistaxis, simple | ~0.72 |
| 30903 | Anterior epistaxis, complex | ~1.18 |
| 30905 | Posterior epistaxis, initial | ~2.17 |
| 30906 | Posterior epistaxis, subsequent | ~2.50 |
| 31238 | Endoscopic hemorrhage control | ~3.21 |
| 31241 | Endoscopic SPA ligation | 8.00 |
| 30920 | Transantral IMA ligation | ~8.52 |
The introduction of 31241 in 2018 was a significant reimbursement correction for ENT. Prior to 2018, formal SPA ligation was being coded as 31238 (~3.21 wRVU), dramatically undervaluing a procedure that involves roughly the same physician work as the open transantral approach. The dedicated 31241 code nearly doubled the reimbursable work value for endoscopic SPA ligation.
Global Period
| Element | Detail |
|---|---|
| Global Period | 000 (Zero-day — endoscopic/surgical procedure) |
| Pre-op Day Included | None |
| Post-op Days Included | None |
| What’s Bundled | Services on the same day directly related to the procedure |
Despite its high wRVU (8.00), CPT 31241 carries a 000-day global period — it is classified as a minor endoscopic procedure from a global period standpoint. This has important practical billing implications:
- Follow-up office visits, packing removal, wound checks, and repeat nasal endoscopy after 31241 are separately billable on subsequent dates of service
- An E/M service provided the same day as 31241 is separately reportable with Modifier -25 (significant, separately identifiable E/M above the pre-procedure assessment)
- There is no 90-day surgical global as there is with 30920; post-operative care is unbundled from the procedure itself
Important
Contrast with 30920: The transantral IMA ligation (30920) has a 090-day major global period, meaning 90 days of post-operative care is bundled in. With 31241’s 000 global, each subsequent encounter (within reason) can be separately evaluated and billed. This is an important distinction for practice revenue modeling — 31241 cases generate follow-up billing opportunities that 30920 cases absorb into the global.
Modifier -25 (Same-Day E/M):
Because the global is 000, a significant, separately identifiable E/M on the same day as 31241 is separately reportable with Modifier -25 on the E/M code. The documentation must reflect that the E/M addressed a problem or clinical decision separate from the routine pre-procedure assessment for 31241.
HCC (Hierarchical Condition Category)
CPT 31241 is a surgical procedure code and does not directly map to HCC risk-adjustment categories under CMS-HCC v28. HCC scoring flows exclusively from ICD-10-CM diagnosis codes on the claim.
The primary diagnosis for most 31241 claims (R04.0, Epistaxis) is not an HCC-mapped condition. However, underlying etiologies and comorbidities coded alongside R04.0 can carry significant HCC relevance:
| Condition | ICD-10-CM | HCC Relevance |
|---|---|---|
| Hereditary coagulation disorder / Hemophilia A | D66 | HCC 46 (Coagulation Defects and Other Specified Hematological Disorders) |
| Hereditary coagulation disorder / Hemophilia B | D67 | HCC 46 |
| Anticoagulant-induced hemorrhagic disorder | D68.32 | Monitor — adverse drug effect |
| Malignant neoplasm of nasal cavity | C30.0 | HCC 10-12 (Cancer categories) |
| Malignant neoplasm of nasopharynx | C11.9 | HCC 10-12 |
| Hereditary hemorrhagic telangiectasia | Q78.0 | Generally not HCC-mapped |
| Thrombocytopenia, secondary | D69.59 | Context-dependent |
| Hypertension | I10 | Not HCC in most models |
CPT 31241 itself: HCC Not Applicable. For Medicare Advantage patients, accurate and complete ICD-10-CM coding of the root cause — particularly coagulation disorders, active malignancy, or other chronic conditions contributing to epistaxis — is critical for proper risk adjustment and RAF score accuracy.
MS-DRG Applicability
CPT 31241 is primarily an outpatient/ASC procedure and does not directly drive MS-DRG assignment. In the vast majority of cases, endoscopic SPA ligation is performed in an ambulatory or ASC setting with same-day or next-day discharge, making MS-DRG assignment irrelevant.
However, a subset of patients with severe, hemodynamically significant posterior epistaxis — particularly those with active coagulopathy, thrombocytopenia, anticoagulant therapy, or significant volume loss — will require inpatient admission, in which case the inpatient facility codes using ICD-10-PCS and the case groups to an MS-DRG. For inpatient epistaxis admissions where SPA ligation is performed, the relevant MS-DRGs remain:
| MS-DRG | Title | Notes |
|---|---|---|
| 150 | Epistaxis with MCC | R04.0 + qualifying MCC (e.g., D68.32, D69.59, significant blood loss anemia, respiratory failure) |
| 151 | Epistaxis without MCC | R04.0; no qualifying MCC documented/coded |
ICD-10-PCS Inpatient Coding Note: In the inpatient facility setting, CPT codes are not used. The SPA ligation must be captured using ICD-10-PCS from the Medical and Surgical section. The approximate PCS construct would involve:
- Section: 0 (Medical and Surgical)
- Body System: 9 (Ear, Nose, Sinus)
- Root Operation: L (Occlusion) or D (Extraction/Resection — if nasal tissue involved)
- Body Part: relevant nasal/sinus body part character
- Approach: 8 (Via Natural or Artificial Opening Endoscopic)
Note
Always verify the current-year ICD-10-PCS tables before assigning inpatient procedure codes; PCS codes change annually and must be validated against the fiscal year tables in effect at the time of discharge.
Important
DRG Revenue Optimization Note: For inpatient admissions, ensuring all MCC-qualifying comorbidities are fully documented and coded is critical. The shift from DRG 151 → DRG 150 based on a qualifying MCC (such as D68.32 for anticoagulant-induced hemorrhage or D69.3 for ITP) can significantly increase facility reimbursement. Clinical Documentation Integrity (CDI) teams should be aware that many epistaxis admissions in anticoagulated or thrombocytopenic patients qualify for DRG 150.
Common ICD-10-CM Diagnosis Codes Paired with CPT 31241
Primary Diagnosis
| ICD-10-CM | Description |
|---|---|
| R04.0 | Epistaxis — the sole, non-lateralized ICD-10-CM code for nosebleeds; no right/left distinction exists in the diagnosis code; laterality is expressed via CPT modifiers (-LT, -RT, -50) |
Contributing Etiologies (Code Additionally When Documented)
| ICD-10-CM | Description |
|---|---|
| I10 | Essential (primary) hypertension |
| I15.0 | Renovascular hypertension |
| I15.9 | Secondary hypertension, unspecified |
| D68.32 | Hemorrhagic disorder due to extrinsic circulating anticoagulants (warfarin, heparin, DOACs) |
| D68.9 | Coagulation defect, unspecified |
| D69.3 | Immune thrombocytopenic purpura (ITP) |
| D69.41 | Evans syndrome |
| D69.59 | Other secondary thrombocytopenia |
| D66 | Hereditary factor VIII deficiency (Hemophilia A) |
| D67 | Hereditary factor IX deficiency (Hemophilia B) |
| Q78.0 | Hereditary hemorrhagic telangiectasia (Osler-Weber-Rendu syndrome) |
| C30.0 | Malignant neoplasm of nasal cavity (tumor as bleeding source) |
| D10.6 | Benign neoplasm of nasopharynx (juvenile nasopharyngeal angiofibroma — JNA) |
| J33.0 | Polyp of nasal cavity (polyp-associated bleeding) |
| J34.2 | Deviated nasal septum |
| J34.89 | Other specified disorders of nose and nasal sinuses |
| J32.0 | Chronic maxillary sinusitis (concurrent sinus pathology) |
| S09.90XA | Unspecified injury of head, initial encounter (traumatic posterior epistaxis) |
| S09.90XD | Unspecified injury of head, subsequent encounter |
| T45.515A | Adverse effect of anticoagulants, initial encounter |
| T45.515D | Adverse effect of anticoagulants, subsequent encounter |
| Z79.01 | Long-term (current) use of anticoagulants |
| Z79.02 | Long-term (current) use of antithrombotic/antiplatelet agents |
Tumor Devascularization Indication (Separate from Epistaxis)
| ICD-10-CM | Description |
|---|---|
| D10.6 | Benign neoplasm of nasopharynx (juvenile angiofibroma — primary code for JNA) |
| C30.0 | Malignant neoplasm of nasal cavity |
| C11.1 | Malignant neoplasm of posterior wall of nasopharynx |
| D14.0 | Benign neoplasm of middle ear, nasal cavity, and accessory sinuses |
When 31241 is performed for preoperative tumor devascularization rather than spontaneous epistaxis, the primary diagnosis should reflect the tumor (e.g., D10.6 for JNA), and R04.0 may be listed as a secondary diagnosis if active bleeding is also present.
Post-Procedure / Follow-Up Encounters
| ICD-10-CM | Description |
|---|---|
| T79.2XXA | Traumatic secondary and recurrent hemorrhage, initial encounter (rebleed post-ligation) |
| T79.2XXD | Traumatic secondary and recurrent hemorrhage, subsequent encounter |
| Z48.89 | Encounter for other specified surgical aftercare |
| Z09 | Encounter for follow-up examination after completed treatment |
| J32.0 | Chronic maxillary sinusitis developing post-procedure (rare complication) |
Coding Examples
Example 1 — Classic Posterior Epistaxis, Refractory to Packing, SPA Ligation
Clinical Scenario: A 63-year-old hypertensive female presents with persistent right-sided posterior epistaxis that failed two rounds of posterior packing (30905 three days ago, 30906 two days ago). She is taken to the ASC for endoscopic SPA ligation. The surgeon decongests the nasal cavity, performs an endoscopic survey, elevates a mucoperiosteal flap posterior to the crista ethmoidalis on the right, opens the sphenopalatine foramen, identifies the SPA and two branches (posterior lateral nasal and posterior septal arteries), applies titanium endoscopic clips to each, and confirms hemostasis. The flap is repositioned. Absorbable packing is placed.
CPT: 31241-RT - Nasal/sinus endoscopy, surgical; with
ligation of sphenopalatine artery, right side
ICD-10: R04.0 - Epistaxis
I10 - Essential hypertension
Note
The prior 30905 (Day 1) and 30906 (Day 2) are billed on their respective dates of service — they are not bundled into 31241 because they occurred on different dates. Once 31241 is billed, its 000-day global period applies only to the date of service.
Example 2 — Same-Day E/M and SPA Ligation
Clinical Scenario: A new patient is seen in the ENT office with recurrent posterior nosebleeds. The physician performs a comprehensive history and examination, reviews prior ENT records, determines that prior conservative management has failed, and makes the decision to proceed directly to endoscopic SPA ligation in the office procedure suite that same day.
CPT 1: 99205-25 - New patient E/M (level 5), Modifier -25
(Significant, separately identifiable E/M
above and beyond the pre-procedure assessment)
CPT 2: 31241-RT - Nasal/sinus endoscopy, surgical; with
ligation of sphenopalatine artery, right
ICD-10: R04.0 - Epistaxis
I10 - Essential hypertension
Z79.01 - Long-term use of anticoagulants
Note
Because 31241 has a 000-day global period, Modifier -25 (not -57) is used on the E/M. Modifier -57 is reserved for E/M encounters where the decision for major surgery (090 global) is made. The 000-day global period means -25 is the correct modifier regardless of the complexity of the E/M.
Example 3 — Bilateral SPA Ligation (HHT Patient)
Clinical Scenario: A 42-year-old male with hereditary hemorrhagic telangiectasia (HHT/Osler-Weber-Rendu) presents with debilitating bilateral recurrent posterior epistaxis. After failure of multiple conservative measures, bilateral endoscopic SPA ligation is performed in the same operative session. The surgeon performs the mucoperiosteal flap, foramen dissection, and clip ligation on both sides sequentially.
CPT: 31241-50 - Nasal/sinus endoscopy, surgical; with
ligation of sphenopalatine artery, bilateral
(OR: 31241-RT and 31241-LT on separate lines
per payer preference — verify bilateral policy)
ICD-10: R04.0 - Epistaxis
Q78.0 - Hereditary hemorrhagic telangiectasia
Note
Medicare generally accepts Modifier -50 on a single line at 150% of the unilateral rate. Some commercial payers require two separate line items with -LT and -RT. Document bilateral necessity clearly in the operative report.
Example 4 — SPA Ligation with Concurrent Ethmoid Artery Ligation
Clinical Scenario: During the endoscopic SPA ligation, the surgeon identifies active bleeding from the anterior ethmoid artery territory (superior nasal cavity) that is not controlled by SPA ligation alone. A decision is made to also ligate the ethmoid arteries via a medial canthal incision during the same operative session.
CPT 1: 31241-RT - SPA ligation, right side (primary/higher value)
CPT 2: 30915-51 - Ligation arteries; ethmoidal arteries
Modifier -51 (Multiple Procedures)
ICD-10: R04.0 - Epistaxis
I10 - Essential hypertension
Note
The operative report must clearly document two distinct anatomic ligation sites with specific operative steps described for each. NCCI edits should be verified; Modifier -51 signals the secondary lesser procedure. Note that 30915 carries a 090-day global period — if it is the secondary code, its global period clock begins on the date of service.
Example 5 — Juvenile Angiofibroma, Preoperative SPA Ligation/Devascularization
Clinical Scenario: A 16-year-old male with biopsy-confirmed juvenile nasopharyngeal angiofibroma (JNA) is scheduled for endoscopic resection. As part of the preoperative preparation, the surgeon performs bilateral endoscopic SPA ligation to devascularize the tumor and reduce intraoperative bleeding risk before the resection.
CPT: 31241-50 - Nasal/sinus endoscopy, surgical; with
ligation of sphenopalatine artery, bilateral
ICD-10: D10.6 - Benign neoplasm of nasopharynx
(JNA — primary diagnosis for this encounter)
R04.0 - Epistaxis (secondary, if active bleeding present)
Note
The primary diagnosis for the devascularization encounter is the tumor (D10.6), not R04.0, as the purpose of the procedure is tumor control rather than spontaneous epistaxis management. If the patient is also actively bleeding, R04.0 may be added as a secondary diagnosis.
Example 6 — Choosing Between 31238 and 31241
Scenario A — Use 31238: Surgeon performs nasal endoscopy, identifies a bleeding area in the right posterior nasal cavity near the sphenopalatine foramen region, and applies bipolar cautery to the mucosal surface of the bleeding vessel. No mucoperiosteal flap is elevated. No dissection of the sphenopalatine foramen is performed. Vessel identity as the SPA is presumed based on anatomic location.
CPT: 31238-RT - Correct. No formal dissection performed.
Scenario B — Use 31241: Surgeon performs nasal endoscopy, decongests the cavity, identifies the posterior attachment of the middle turbinate, elevates a mucoperiosteal flap over the posterior lateral nasal wall, identifies the crista ethmoidalis, opens the sphenopalatine foramen with a curette, visualizes the SPA and its two branches, and applies endoscopic hemostatic clips to each branch.
CPT: 31241-RT - Correct. Formal flap, foramen dissection,
vessel identification, and clip ligation documented.
Warning
Audit Red Flag: Billing 31241 without clear operative documentation of the mucoperiosteal flap, crista ethmoidalis, foramen dissection, and clip ligation is upcoding. The ~4.79 wRVU difference between 31238 and 31241 makes this a high-value audit target for Medicare and commercial payers alike.
Example 7 — Failed 31241, Escalation to 30920 at a Subsequent Encounter
Clinical Scenario: A patient undergoes right-sided endoscopic SPA ligation (31241-RT). Two weeks later, the patient re-presents with recurrent right-sided posterior hemorrhage. Repeat nasal endoscopy reveals rebleeding from the ethmoid territory, not the SPA territory (which remains ligated and patent-free). Decision is made to proceed with transantral internal maxillary artery ligation (30920).
First Encounter (Day 1):
CPT: 31241-RT - SPA ligation
ICD-10: R04.0, I10
Second Encounter (Day 15, separate date of service):
CPT: 30920-RT - Ligation arteries; internal maxillary artery, transantral
ICD-10: R04.0
T79.2xxD - Traumatic secondary and recurrent hemorrhage, subsequent
I10 - Essential hypertension
Note
Because 31241 has a 000-day global, there is no global period conflict when billing 30920 on a subsequent date. The 30920 carries its own 090-day global starting from its date of service.
Key Coding Pearls
- 31241 requires documentation of formal SPA dissection — no exceptions. The operative report must describe mucoperiosteal flap elevation, crista ethmoidalis identification, sphenopalatine foramen dissection, and clip ligation of the artery. Without these elements, 31238 is the correct code. This is one of the most common ENT coding errors and audit findings since 2018.
- 31241 was created in 2018 specifically to correct historic underpayment. Prior to its introduction, virtually all endoscopic SPA ligation cases were billed as 31238 (~3.21 wRVU). Practices that performed the formal ligation technique but continued billing 31238 after 2018 are leaving approximately 4.79 wRVU per case unreimbursed — a significant revenue opportunity.
- 000-day global = separately billable post-op visits. Unlike the 90-day global of open surgical approaches, 31241’s 000-day global means every follow-up visit, packing removal, or repeat endoscopy after the procedure date is billable as a new encounter with appropriate E/M coding.
- Modifier -25 (not -57) for same-day E/M. The 000-day global period means the E/M requires Modifier -25, not -57. Reserve -57 exclusively for major surgery (090 global) decision encounters.
- Modifier -50 vs. -LT/-RT for bilateral cases. Medicare generally accepts -50 on a single line for bilateral; commercial payers may differ. Always verify payer-specific bilateral billing policy before submission.
- NCCI absolutely bundles 31231 into 31241. Diagnostic nasal endoscopy (31231) on the same date as 31241 will be denied; separate billing requires a genuinely separate session with Modifier -XE or -59 supported by strong documentation.
- Assistant surgeon documentation must be in the operative note. Because 31241 carries indicator “2” (assistant payable when supported), the conditions requiring assistance must be specifically described — not just implied. The findings paragraph and the body of the operative note should together make a clear case for why an assistant was medically necessary.
- HHT patients warrant bilateral billing. Patients with hereditary hemorrhagic telangiectasia often require bilateral and staged SPA ligation. Each side on each date of service is separately billable; document each session independently.
- Tumor devascularization changes the primary diagnosis. When 31241 is performed for JNA or other tumor-related hemorrhage control rather than spontaneous epistaxis, the tumor ICD-10-CM code (e.g., D10.6) is the principal diagnosis — not R04.0.
- Frequency considerations for recurrent cases. There is no specific Medicare LCD limiting how frequently 31241 can be performed on a given patient, but medical necessity must be documented for each encounter. Recurrence after prior SPA ligation is well-documented in the literature (5-15% failure rate); document which artery territory is now bleeding (SPA vs. ethmoid) to justify the next step in management.
- CY 2026 facility PE reduction. The 2026 CMS final rule reduced facility-setting indirect PE RVUs by approximately 50% of the work-RVU-based allocation. ENT practices with hospital-based or facility POS designations will see meaningfully lower 31241 reimbursement in the facility setting compared to pre-2026 calculations. Office-based or non-facility ASC settings are largely insulated from this change.