Diagnostic Nasal/Sinus Endoscopy, Functional Endoscopic Sinus Surgery (FESS) and Turbinectomy - (0554) — MM 0554 | CIGNA Coverage Update

Cigna modified MM 0554 covering FESS, diagnostic nasal/sinus endoscopy, and turbinectomy procedures, effective September 26, 2025. Here's what billing teams need to do.

Cigna Healthcare updated coverage policy MM 0554 on September 26, 2025. This policy governs diagnostic nasal/sinus endoscopy, functional endoscopic sinus surgery (FESS), and turbinectomy procedures. The update affects 20 CPT codes — including 31231, 31253, 31254, 31255, 31256, 30130, 30140, 30801, and 30802 — along with 195 ICD-10-CM diagnosis codes. If your practice bills FESS or turbinectomy to Cigna, this coverage policy change deserves your attention before claims go out the door.

Quick-Reference Table

Cigna FESS and Nasal/Sinus Endoscopy Coverage Criteria and Medical Necessity Requirements 2025

The MM 0554 Cigna system update consolidates medical necessity criteria for three distinct procedure categories: diagnostic nasal/sinus endoscopy, FESS, and turbinectomy. This matters because payers increasingly audit bundling and medical necessity documentation together — a failed necessity argument on FESS can pull down all the satellite codes billed on the same claim.

The Cigna FESS coverage policy directs clinical criteria to the Coding Information section of the policy document. That structure is worth flagging. It means your billing team and coders need to read the coverage criteria and the code tables together — not separately.

For FESS billing, the key codes to watch are CPT 31253, 31254, 31255, 31256, 31257, 31259, 31267, 31276, 31287, and 31288. These span partial and total ethmoidectomy, maxillary antrostomy, sphenoidotomy, and frontal sinus exploration. Each has distinct documentation requirements that must align with the specific procedure performed.

Turbinectomy billing centers on CPT codes 30130 (excision inferior turbinate), 30140 (submucous resection inferior turbinate), 30801 (ablation, soft tissue of inferior turbinates, superficial), and 30802 (ablation, intramural). These four codes represent different surgical approaches to the same anatomical structure. Submitting the wrong one — even with good documentation — will generate a claim denial.

Diagnostic procedures include CPT 31231 (nasal endoscopy, diagnostic), 31233 (with maxillary sinusoscopy), and 31235 (with sphenoid sinusoscopy). These are often billed as precursors to surgical intervention. Pay close attention to the "separate procedure" designation on 31231 and 31237 — Cigna will bundle these if billed alongside a more comprehensive surgical endoscopy without a modifier and a clear clinical rationale.

Prior authorization requirements apply to this policy. Verify current prior auth requirements through Cigna's coverage check tools before scheduling surgical cases. Authorization obtained before September 26, 2025 may not reflect the updated criteria.

The reimbursement exposure here is real. ENT practices that bill multiple FESS components in a single session — ethmoidectomy plus maxillary antrostomy plus sphenoidotomy — need tight documentation tying each code to a distinct surgical finding and action. Cigna will review these claims for medical necessity at the code level, not just the encounter level.

Coverage Indications at a Glance

The policy covers a broad diagnostic and surgical range. The 195 ICD-10-CM codes span malignant and benign neoplasms, infectious conditions, structural abnormalities, lacrimal system disorders, and neurological indications. Here's a high-level view of the indication categories supported:

The policy does not separately enumerate non-covered indications in the summary data provided. If you're billing a Cigna FESS claim and the diagnosis falls outside the 195 supported ICD-10 codes, expect a medical necessity denial. Talk to your compliance officer if you're seeing a pattern of diagnoses that don't map cleanly to the code set.

Cigna FESS and Turbinectomy Billing Guidelines and Action Items 2025

CPT, HCPCS, and ICD-10 Codes for FESS and Nasal/Sinus Endoscopy Under MM 0554

Covered CPT Codes (When Medical Necessity Criteria Are Met)

Key ICD-10-CM Diagnosis Codes (Selected from 195 Total)

The full list contains 195 ICD-10-CM codes. Below are the primary groupings. Confirm the complete list against the MM 0554 Cigna system policy document at the effective date before filing claims.

Note: The full policy includes 195 ICD-10-CM codes. Pull the complete list from the MM 0554 policy document on the Cigna provider portal. Do not rely on this excerpt alone for claim submission.

The real issue with a 195-code ICD-10 list is that it creates false confidence. Your coders see a long list and assume their diagnosis is covered. Spot-check the specific codes your practice uses most often against the actual policy document. That's where denials hide.