Crystal's MCW Coder Hub👩🏾⚕️ CPT 30915 — Ligation of Arteries; Anterior Ethmoidal
Overview
CPT 30915 describes the surgical ligation of the anterior ethmoidal artery for the control of refractory nasal hemorrhage. This is a definitive surgical procedure performed when conservative measures — including anterior and/or posterior nasal packing, topical vasoconstrictors, chemical or electrocautery, and balloon catheter tamponade — have failed to achieve hemostasis, or when the anatomy and origin of bleeding clearly implicate the anterior ethmoidal artery as the bleeding source.
The anterior ethmoidal artery is a branch of the ophthalmic artery (itself a branch of the internal carotid artery), which travels through the anterior ethmoidal foramen on the medial orbital wall, crosses the roof of the ethmoid sinuses (the fovea ethmoidalis), and supplies the anterosuperior nasal septum and lateral nasal wall. Because of its origin from the internal carotid system (not the external carotid system), it is not amenable to standard external carotid artery ligation or transantral internal maxillary artery ligation. This anatomic distinction is critical — it is why 30915 exists as a separate procedure from 30920.
The procedure is typically performed via an external Lynch incision (medial canthal approach) or, increasingly, via endoscopic transnasal approach, allowing the surgeon to identify and clip or cauterize the artery at its entry into the nasal cavity near the anterior skull base. Due to proximity to the orbit and optic apparatus, this is a technically demanding and high-risk procedure requiring subspecialty ENT or rhinology expertise.
Code Description — In Detail
30915 captures the complete surgical episode of:
- Pre-operative evaluation confirming anterior ethmoidal artery as the bleeding source
- Surgical approach — either external (Lynch/medial orbitotomy incision) or endoscopic endonasal
- Identification of the anterior ethmoidal artery at the anterior ethmoidal foramen (approximately 24 mm posterior to the anterior lacrimal crest along the frontoethmoidal suture line)
- Ligation, clipping, or electrocautery of the artery with confirmed hemostasis
- Closure (if external approach used)
When performed endoscopically, the procedure involves traversing the ethmoid sinuses to expose the skull base, identifying the artery as it crosses from the orbit into the nasal roof, and cauterizing or clipping it under direct endoscopic visualization.
Note on Bilateral Procedures:
The anterior ethmoidal artery exists bilaterally. If ligation is performed on both sides in the same operative session, append modifier -50 (bilateral procedure). The bilateral indicator for this code is 1, meaning the fee schedule is adjusted at 150% of the unilateral rate when billed with modifier 50.
wRVU
| Component | Value |
|---|---|
| wRVU | 7.58 |
| Physician Work | 7.58 |
| Global Period | 90 days |
| Status | Active surgical code |
At 7.58 wRVU, this reflects the significant surgical complexity, operative risk, and proximity to critical orbital and intracranial structures. For comparison, CPT 30920 (internal maxillary artery ligation) carries 10.60 wRVU, reflecting the added complexity of the transantral approach. The wRVU for 30915 is meaningful and contributes substantially to ENT/rhinology productivity metrics.
Assistant Payable
Yes. CPT 30915 is assistant-at-surgery payable, particularly when performed via external approach or in complex cases with significant bleeding risk, orbital involvement, or skull base proximity. The assistant indicator supports billing when a qualified surgical assistant (PA, NP, or second surgeon) is present and scrubbed. Payer policy may vary — Medicare and many commercial payers require documentation of medical necessity for the assistant.
| Indicator | Value |
|---|---|
| Assistant Surgery Indicator | 1 (assistant allowed) |
| Co-Surgery | Possible if two surgeons with distinct roles (e.g., ENT + ophthalmology for orbital approach) |
Global Period
| Component | Detail |
|---|---|
| Global Period | 90 days |
| Pre-op Period | 1 day included |
| Post-op visits | Included in global |
| Modifier to break global | 24 (unrelated E/M), 25 (same-day E/M), 79 (unrelated procedure) |
The 90-day global period means all routine follow-up care related to the ligation is bundled into the surgical fee for 90 days post-operatively. Separate E/M visits for epistaxis management during this window are not separately billable unless the visit is for an unrelated problem.
HCC (Hierarchical Condition Category)
CPT codes do not carry HCC designations directly. HCC risk adjustment is driven by ICD-10-CM diagnosis codes. However, the underlying diagnoses that most commonly necessitate anterior ethmoidal artery ligation and carry HCC implications include:
| ICD-10-CM | Description | HCC Mapped |
|---|---|---|
| R04.0 | Epistaxis | No |
| Q78.0 | Hereditary hemorrhagic telangiectasia (HHT) | No |
| D68.312 | Acquired hemophilia | Yes — HCC 48 |
| D69.59 | Other secondary thrombocytopenia | Yes — HCC 48 |
| C30.0 | Malignant neoplasm of nasal cavity | Yes — HCC 11 |
| C31.0 | Malignant neoplasm of maxillary sinus | Yes — HCC 11 |
| D3A.090 | Benign carcinoid tumor, other sites | Yes — HCC 12 |
| Z79.01 | Long-term use of anticoagulants | No |
| I10 | Essential hypertension | No |
| I60.9 | Nontraumatic subarachnoid hemorrhage | Yes — HCC 100 |
Tip
For inpatient encounters, precise documentation of the underlying etiology driving the hemorrhage is critical. HHT (Osler-Weber-Rendu), coagulopathies, and neoplasms can have HCC and risk-adjustment implications that affect both payer reimbursement and quality metrics. Always query the provider when the underlying cause is documented vaguely (e.g., simply “nosebleed” without etiology) if clinical indicators suggest a higher-specificity diagnosis.
Includes
- Surgical ligation, clipping, or electrocauterization of the anterior ethmoidal artery
- External (Lynch incision / medial canthal approach) or endoscopic endonasal approach
- Intraoperative identification of the artery at the anterior ethmoidal foramen
- Confirmation of hemostasis at conclusion of procedure
- Standard closure of the external incision (if open approach)
- Routine post-operative management within the 90-day global period
- Anterior ethmoidectomy performed solely to gain access to the artery (incidental to approach)
Excludes / Not Included
- 30920 — Ligation of arteries; internal maxillary artery, transantral (separate anatomic target, external carotid system, separately reportable)
- 30916 — Ligation of arteries; posterior ethmoidal (separately reportable; different vessel, different foramen, ~36 mm from anterior lacrimal crest)
- 30905 / 30906 — Posterior epistaxis control with packing (non-surgical, separately reportable if performed at a separate session prior to escalation)
- 31255 / 31256 / 31267 — Functional endoscopic sinus surgery (FESS); ethmoidectomy codes are not separately reported when ethmoidectomy is performed only to access the anterior ethmoidal artery unless it is a distinct, separately indicated procedure
- 67400s — Orbital surgery codes; if the procedure requires entry into the orbit for separate indication, orbital surgery codes may be added, but routine retraction of periorbita to expose the artery is included in 30915
- Embolization — Interventional radiology arterial embolization (37244) is a distinct procedure and is not part of 30915
- 37615 — Ligation of the external carotid artery (different vessel, different approach, different indication)
MS-DRG (Medical Severity Diagnosis Related Groups)
CPT 30915 is a physician fee schedule code and does not directly assign an MS-DRG. For inpatient coders, MS-DRG assignment is driven by ICD-10-CM/PCS codes. When anterior ethmoidal artery ligation is performed during an inpatient admission, the relevant ICD-10-PCS procedure codes and resulting MS-DRGs are:
Relevant ICD-10-PCS Codes
| ICD-10-PCS | Description |
|---|---|
| 03LG0ZZ | Occlusion of right internal carotid artery, open approach |
| 03LY3ZZ | Occlusion of upper artery, percutaneous approach |
| 09BK0ZZ | Excision of nasal turbinate, open approach |
| 09BM0ZZ | Excision of nasal septum, open approach |
| 03LR0ZZ | Occlusion of face artery, open approach |
Tip
For the anterior ethmoidal artery specifically, ICD-10-PCS coding would capture occlusion of the ophthalmic artery branch or face artery depending on the approach and documentation. Query the operative report carefully — the specific vessel clipped and approach used determines the ICD-10-PCS root operation and body part values.
Relevant MS-DRGs (Epistaxis as Principal Diagnosis)
| MS-DRG | Description | Weight (approx.) |
|---|---|---|
| 166 | Other ear, nose, mouth and throat diagnoses with MCC | Higher |
| 167 | Other ear, nose, mouth and throat diagnoses with CC | Moderate |
| 168 | Other ear, nose, mouth and throat diagnoses without CC/MCC | Lower |
| 133 | Other ear, nose, mouth and throat OR procedures with MCC | High |
| 134 | Other ear, nose, mouth and throat OR procedures with CC | Moderate-High |
| 135 | Other ear, nose, mouth and throat OR procedures without CC/MCC | Moderate |
Tip
When the ligation is coded as an OR procedure via ICD-10-PCS, the DRG will typically shift from the medical DRG (166-168) to a surgical DRG (133-135), which carries significantly higher relative weight and reimbursement. Accurate ICD-10-PCS coding of the arterial ligation is therefore essential for appropriate DRG capture. Always ensure the operative report supports the procedure as a distinct surgical intervention.
Code Tree
30900 - 30999 Surgery: Nose
│
├── 30901 Control nasal hemorrhage, anterior, simple
├── 30903 Control nasal hemorrhage, anterior, complex
├── 30905 Control nasal hemorrhage, posterior, initial
├── 30906 Control nasal hemorrhage, posterior, subsequent
│
├── 30915 Ligation of arteries; anterior ethmoidal ◄ THIS CODE
├── 30916 Ligation of arteries; posterior ethmoidal
├── 30920 Ligation of arteries; internal maxillary artery, transantral
│
├── 30930 Fracture nasal inferior turbinate(s), therapeutic
├── 30999 Unlisted procedure, nose
│
└── Related Cross-System Codes
├── 37244 Endovascular embolization to treat hemorrhage
├── 37615 Ligation, major artery (e.g., external carotid)
└── 31255 Nasal/sinus endoscopy, surgical; ethmoidectomy (if separately indicated)
Anatomic Context — Anterior Ethmoidal Artery
Understanding the surgical anatomy is essential for accurate coding, operative report interpretation, and query writing:
| Landmark | Measurement / Detail |
|---|---|
| Origin | Ophthalmic artery (internal carotid system) |
| Entry into orbit | Via anterior ethmoidal foramen |
| Distance from anterior lacrimal crest | ~24 mm posterior along frontoethmoidal suture |
| Crosses skull base | Anterior to posterior ethmoidal artery |
| Nasal supply | Anterosuperior septum, lateral nasal wall, anterior ethmoidal cells |
| Meningeal branch | Supplies dura of anterior cranial fossa — risk of intracranial bleeding if injured |
| Ophthalmic risk | Retraction of periorbita required — risk of orbital hematoma, vision loss |
Note
This anatomic proximity to the optic nerve and anterior cranial fossa is what elevates the complexity and risk of this procedure relative to other epistaxis surgeries. Surgeon documentation of these risks and the specific surgical steps taken to protect adjacent structures supports the work value and medical necessity of the procedure.
Modifier Guidance
| Modifier | When to Use |
|---|---|
| -50 | Bilateral procedure — anterior ethmoidal artery ligation performed on both sides in same operative session; bill at 150% |
| -RT / -LT | Right or left side designation when unilateral; some payers require laterality modifiers instead of -50 |
| -22 | Increased procedural services — if the procedure was substantially more complex due to prior surgery, scarring, anatomic variation, or concurrent severe hemorrhage requiring extraordinary effort; requires detailed documentation |
| -52 | Reduced services — if the planned procedure was terminated or partially completed |
| -78 | Return to OR for related procedure during global period — if re-operation for rebleeding occurs |
| -79 | Unrelated procedure during global period |
| -80 | Assistant surgeon |
| -82 | Assistant surgeon when qualified resident unavailable (teaching hospital context) |
Coding Examples
Example 1 — Elective Anterior Ethmoidal Artery Ligation After Failed Packing
A 65-year-old male with recurrent severe epistaxis refractory to bilateral posterior packing on two prior admissions is taken to the operating room. The ENT surgeon performs an endoscopic endonasal anterior ethmoidal artery ligation on the right side. The artery is identified at the skull base and cauterized with bipolar electrocautery under endoscopic visualization. Hemostasis is confirmed. The patient has a history of hereditary hemorrhagic telangiectasia (HHT).
CPT Reported: 30915 (right anterior ethmoidal artery ligation)
ICD-10-CM: R04.0 (Epistaxis), Q78.0 (HHT/Osler-Weber-Rendu)
Modifier: -RT
Notes: HHT (Q78.0) should be sequenced as a relevant secondary diagnosis as it is the underlying cause driving recurrent hemorrhage. No modifier 50 as procedure was unilateral. If FESS was performed for a separate, independently indicated reason during the same session, 31255/31256 could be additionally reported with modifier -59 or -XS, but only if separately documented and medically indicated beyond access.
Example 2 — Bilateral Ligation
A 72-year-old woman with refractory bilateral posterior and anterosuperior epistaxis related to acquired coagulopathy undergoes bilateral anterior ethmoidal artery ligation via external Lynch incisions. Both arteries are clipped and hemostasis confirmed bilaterally.
CPT Reported: 30915-50 (bilateral)
ICD-10-CM: R04.0, D68.4 (Acquired coagulation factor deficiency)
Fee: Billed at 150% of the unilateral allowable
Notes: Operative report must document both sides individually with confirmation of hemostasis on each side. Bilateral indicator for 30915 is 1, supporting the -50 billing.
Example 3 — Combined Anterior and Internal Maxillary Ligation
A 58-year-old male with massive epistaxis from multiple bleeding sites is taken to the OR. The ENT surgeon performs both an anterior ethmoidal artery ligation (via external approach, right) and a right transantral internal maxillary artery ligation during the same operative session.
CPT Reported: 30915-RT, 30920-RT-51
ICD-10-CM: R04.0, I10 (Hypertension)
Notes: Both procedures are separately reportable as they target distinct anatomic vessels via different approaches. Modifier -51 is appended to the secondary procedure (30920) to indicate multiple procedures. Some payers may apply multiple procedure reduction rules.
Example 4 — Inpatient Coder Scenario
A 67-year-old male is admitted for severe intractable epistaxis. After failed posterior packing, he is taken to the OR for anterior ethmoidal artery ligation performed endoscopically. The operative note documents endoscopic identification and bipolar cauterization of the right anterior ethmoidal artery at the skull base.
Principal Diagnosis (ICD-10-CM): R04.0 (Epistaxis)
Secondary Diagnoses: I10 (Hypertension), Z79.01 (Long-term anticoagulant use)
ICD-10-PCS (procedure): Occlusion of face artery / anterior ethmoidal branch — confirm body part and approach values with facility coding guidelines and AHA Coding Clinic guidance
MS-DRG Assignment: With OR procedure coded — DRG 134 (Other ear, nose, mouth and throat OR procedures with CC) if hypertension qualifies as CC
Notes for Inpatient Coder: The shift from a medical DRG (167) to a surgical DRG (134) occurs when the ICD-10-PCS procedure is correctly coded as an OR procedure. This is a significant DRG weight difference. Query the physician if the operative note does not clearly identify the specific vessel ligated or the approach used, as this directly impacts ICD-10-PCS code assignment.
Documentation Requirements for Providers
To support CPT 30915 and avoid claim denial or audit risk, the operative report should include:
- Pre-operative diagnosis confirming epistaxis refractory to conservative management
- Specific identification of the anterior ethmoidal artery as the surgical target
- Surgical approach used — external Lynch incision vs. endoscopic endonasal
- Intraoperative findings — presence of active bleeding from the vessel, artery anatomy
- Method of occlusion — clip, ligature, bipolar cautery
- Confirmation of hemostasis post-ligation
- Documentation of adjacent structure preservation (periorbita, lamina papyracea, skull base)
- Laterality — right, left, or bilateral
- Any complications encountered
Clinical Escalation Pathway
Epistaxis Episode
│
├── Step 1: Conservative — topical vasoconstrictors, silver nitrate cautery
│
├── Step 2: Anterior packing (CPT 30901 / 30903)
│
├── Step 3: Posterior packing / balloon (CPT 30905 / 30906)
│
├── Step 4: Surgical Ligation
│ ├── Anterior ethmoidal artery → CPT 30915 (this code)
│ ├── Posterior ethmoidal artery → CPT 30916
│ └── Internal maxillary artery → CPT 30920 (external carotid system)
│
└── Step 5: Interventional Radiology Embolization → CPT 37244
(sphenopalatine, facial, or internal maxillary artery)