Endoscopic Ultrasonography — CPB 0446 | AETNA Coverage Update

TL;DR: Aetna, a CVS Health company, modified CPB 0446 governing endoscopic ultrasonography (EUS) coverage, effective September 26, 2025. Fifteen covered indications now appear in the updated policy, spanning CPT codes 43231 through 76975 and HCPCS C7512, C7556, and C1738. If your practice bills EUS for GI staging, pancreatic evaluation, or biliary drainage, review your charge capture and ICD-10 mapping before September 26, 2025.

Quick-Reference Table

Aetna Endoscopic Ultrasonography Coverage Criteria and Medical Necessity Requirements 2025

The Aetna EUS coverage policy under CPB 0446 lists 15 distinct indications where EUS meets medical necessity. Each one is an independent qualifying reason for coverage. Your clinical documentation only needs to support one.

This is a broad policy. Aetna covers EUS for everything from diagnosing common bile duct stones (CPT 43259) to staging lung cancer with fine-needle aspiration (CPT 43242 or 43232). It also covers EUS-guided biliary drainage for palliation of malignant biliary obstruction—a high-value procedure that practices sometimes underdocument.

The 15 covered indications are:

For endoscopic ultrasonography billing under this policy, medical necessity documentation must match one of these 15 criteria precisely. Vague clinical notes that don't map to a specific indication are your fastest path to a claim denial.

Whether EUS is covered under Aetna also depends on your ICD-10 coding. The policy includes 382 ICD-10-CM codes. Missing even one code from your active charge master can cause a denial on a claim that should have paid. Check the full list at the Aetna CPB 0446 policy source.

The policy does not explicitly state prior authorization requirements for all EUS procedures. That said, high-complexity EUS interventions—particularly EUS-guided biliary drainage and celiac plexus neurolysis—often trigger payer review. Confirm prior auth requirements with your Aetna provider representative before September 26, 2025, especially for newer procedure codes.

Aetna Endoscopic Ultrasonography Exclusions and Non-Covered Indications

Two categories in this policy are explicitly not covered.

EUS-guided radiofrequency ablation for pancreatic neuroendocrine neoplasms (PNENs) is not covered. The related elastography codes—CPT 76981, 76982, and 76983—are listed under a non-covered group in CPB 0446. Aetna treats this as experimental or investigational. If your practice performs EUS-RFA for PNENs and bills 76981–76983 to Aetna, expect denial.

HCPCS C9768—endoscopic ultrasound-guided direct measurement of hepatic portosystemic pressure gradient—is also listed as not covered for the indications in this policy. This is a newer HCPCS code, and its exclusion here is not surprising. Don't assume a new code with a descriptor that sounds relevant is covered. It isn't under CPB 0446.

Coverage Indications at a Glance

Aetna Endoscopic Ultrasonography Billing Guidelines and Action Items 2025

This is where most billing teams lose money—not on the covered indications, but on documentation gaps and ICD-10 mismatches that turn payable claims into denials. Here's what to do before the September 26, 2025 effective date.

1. Audit your ICD-10 charge master against all 382 covered codes.
The policy supports 382 ICD-10-CM diagnosis codes. If your charge master is missing even a handful—especially newer codes for biliary malignancies (C24.x) or GI neoplasms (C15.x–C21.x)—you'll lose clean claims. Pull a report of your top EUS diagnosis codes and cross-check every one against the CPB 0446 covered list.

2. Flag CPT 76981, 76982, and 76983 in your claim scrubber for Aetna patients.
These elastography codes are explicitly not covered under CPB 0446 for EUS-RFA in PNENs. If your GI or oncology team performs EUS-RFA and your billing system auto-attaches these codes, you need a hard stop before claims go out. Build a payer-specific edit in your scrubber by September 26, 2025.

3. Remove C9768 from Aetna EUS claim templates.
HCPCS C9768 is not covered under the indications in this policy. If it's sitting in a template, it's generating denials. Delete it from any Aetna-specific EUS billing template now.

4. Document the specific indication, not just the procedure.
For EUS-guided biliary drainage, fiducial placement, and celiac plexus neurolysis, Aetna is looking for clinical documentation that ties directly to the covered indication. "EUS performed" doesn't cut it. Your operative notes need to state the indication explicitly—"EUS-guided biliary drainage for palliation of malignant biliary obstruction" maps directly to indication 10 in the policy. Generic procedure notes create medical necessity disputes.

5. Verify prior authorization for complex EUS interventions.
CPT 43240 (pseudocyst drainage), CPT 64530 (celiac plexus block or neurolysis), and EUS-guided biliary drainage codes involve higher reimbursement and higher Aetna scrutiny. Confirm prior auth requirements with Aetna directly before performing these procedures. The coverage policy confirms coverage; prior auth is a separate administrative hurdle.

6. Confirm your lung cancer staging pathway includes the right codes.
EUS with FNA for lung cancer staging covers CPT 31652, 31653, 31654, 43232, and 43242—plus HCPCS C7512 and C7556 for certain bronchoscopic approaches. If your pulmonology or thoracic surgery team bills these alongside GI for mediastinal staging, make sure both teams use the same Aetna-aligned coding pathway. Coordination gaps between departments are a common source of avoidable denials here.

If your EUS volume is high or your mix includes PNENs treatment, EUS-RFA, or hepatic pressure gradient measurement, loop in your compliance officer before September 26. The line between covered endoscopic therapy and excluded radiofrequency ablation is clinically subtle and worth getting right on paper.

CPT, HCPCS, and ICD-10 Codes for Endoscopic Ultrasonography Under CPB 0446

Covered CPT Codes (When Selection Criteria Are Met)

Not Covered / Experimental CPT Codes

Other CPT Codes Related to CPB 0446

Covered HCPCS Codes (When Selection Criteria Are Met)

Not Covered HCPCS Codes

Key ICD-10-CM Diagnosis Codes

The full CPB 0446 policy includes 382 ICD-10-CM codes. Below are the primary malignancy and biliary codes most relevant to EUS billing. Pull the complete list from the Aetna CPB 0446 policy page.