Colonoscopy, Colorectal Cancer Screening, and Related Procedures — CPB 0516 | AETNA Coverage Update

TL;DR: Aetna, a CVS Health company, modified CPB 0516 — its colonoscopy and colorectal cancer screening coverage policy — effective November 14, 2025. Here's what billing teams need to know before submitting claims.

CPB 0516 Aetna governs coverage for colonoscopy, CT colonography, stool-based testing, and related colorectal procedures. This update affects a wide range of CPT codes — including 45378 through 45398 for flexible colonoscopy, 45330 through 45350 for sigmoidoscopy, 81528 and 0464U for stool DNA testing, and 74263 for CT colonography — across gastroenterology, colorectal surgery, and primary care billing teams.

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Quick-Reference Table

Field	Detail Copy
Payer	Aetna
Policy	Colonoscopy, Colorectal Cancer Screening, and Related Procedures
Policy Code	CPB 0516
Change Type	Modified
Effective Date	November 14, 2025
Impact Level	High
Specialties Affected	Gastroenterology, Colorectal Surgery, Primary Care, Radiology, Pathology
Key Action	Audit your charge capture and screening vs. surveillance documentation before billing claims on or after November 14, 2025

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Aetna Colorectal Cancer Screening Coverage Criteria and Medical Necessity Requirements 2025

The Aetna colonoscopy coverage policy draws a hard line between three patient categories: average-risk screening, high-risk testing, and post-diagnosis surveillance. Each category has its own frequency rules, age triggers, and covered modalities. Getting those categories wrong is the fastest path to a claim denial.

Average-Risk Screening

For average-risk members, Aetna considers colorectal cancer screening a medically necessary preventive service starting at age 45. The physician must recommend the test. Aetna covers all of the following options when those conditions are met:

One rule applies to all average-risk members: if they're 85 or older, routine screening is not medically necessary unless life expectancy is 10 or more years. Document that clinical judgment explicitly. Without it, you're billing into a denial.

The USPSTF guidelines govern average-risk screening under this coverage policy. Once a member has a positive screening result, a prior adenoma, or a prior colorectal cancer diagnosis, USPSTF guidance no longer applies. That member moves to surveillance — different criteria, different frequency, different billing.

High-Risk Testing

Aetna covers testing as frequently as every two years for members with specific family history or genetic risk factors. Covered modalities for this group are colonoscopy, sigmoidoscopy, and DCBE — not stool-based testing alone.

Annual FOBT is covered as a standalone or in combination with sigmoidoscopy for high-risk members.

The risk factors that trigger high-risk status are specific. A first-degree relative with colorectal cancer or adenomatous polyps qualifies — screening starts at age 40, or 10 years before the earliest family diagnosis, whichever is earlier. Family history of familial adenomatous polyposis (FAP) triggers screening at puberty. Hereditary non-polyposis colorectal cancer (HNPCC) starts at age 20. MYH-associated polyposis in siblings starts at age 25. Cowden syndrome starts at age 35.

Document the specific qualifying condition in the medical record. If a chart says "family history of colon cancer" without specifying the relationship (first-degree) and age at diagnosis, you've set up a prior authorization fight you may not win.

Surveillance

Once a member has a confirmed diagnosis — inflammatory bowel disease, a history of adenomatous polyps, prior colorectal cancer, or a history of Lynch syndrome or familial polyposis — they move to surveillance. Colonoscopy, flexible sigmoidoscopy, and DCBE are covered as frequently as annually in this group.

Surveillance coding is where the biggest billing errors happen. Don't bill a surveillance colonoscopy with a routine screening diagnosis code. The ICD-10-CM code set under this policy is 250 codes deep — the right diagnosis code is there. Use it.

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Aetna Colonoscopy Exclusions and Non-Covered Indications

Two new category III codes are explicitly not covered under CPB 0516 for the indications listed in the policy:

#	Excluded Procedure Copy
1	CPT 0885T — Colonoscopy with initial transendoscopic mechanical dilation (nondrug-coated balloon)
2	CPT 0886T — Sigmoidoscopy with initial transendoscopic mechanical dilation (nondrug-coated balloon)

If your endoscopists are performing balloon dilation during colonoscopy or sigmoidoscopy and billing those codes against Aetna, stop. These are explicitly excluded.

Aetna also places several stool-based and AI-assisted oncology screening tests in a "not covered" or "investigational" bucket. This is the same pattern Aetna used when it initially restricted Cologuard — slow acceptance of emerging stool-based assays until evidence catches up. The following codes fall outside standard coverage:

Full-spectrum endoscopy (FUSE) colonoscopy coverage is also restricted. If you're billing FUSE-related codes, verify coverage separately before submitting.

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Coverage Indications at a Glance

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Aetna Colonoscopy Billing Guidelines and Action Items 2025

Colorectal cancer screening billing is already one of the highest-denial categories in GI. This update tightens the criteria without simplifying them. Here's what your team should do now.

Copy Action Items

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CPT, HCPCS, and ICD-10 Codes for Colonoscopy Under CPB 0516

Covered CPT Codes (When Selection Criteria Are Met)

Not Covered / Experimental CPT Codes

Note: The policy data includes 27 additional CPT codes not shown in the source extract. Review the full CPB 0516 policy document at Aetna's clinical policy site for the complete code list.

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