Cholecystokinin Cholescintigraphy — CPB 0266 | AETNA Coverage Update

Aetna modified CPB 0266 for cholecystokinin (CCK) cholescintigraphy, effective September 26, 2025. Here's what billing teams need to update before claims start denying.

Aetna, a CVS Health company, updated its coverage policy for CCK administration as an adjunct to cholescintigraphy under CPB 0266 Aetna system. The policy now lists eight specific medical necessity indications. Billing teams who bill CPT 78226 and 78227, paired with HCPCS J2805 or J2806 for sincalide injection, need to confirm their diagnosis codes and documentation line up with these criteria before submitting claims.

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Quick-Reference Table

Field	Detail Copy
Payer	Aetna, a CVS Health company
Policy	Cholecystokinin Cholescintigraphy
Policy Code	CPB 0266
Change Type	Modified
Effective Date	September 26, 2025
Impact Level	Medium
Specialties Affected	Nuclear medicine, radiology, gastroenterology, general surgery
Key Action	Confirm each claim for CPT 78227 + J2805/J2806 maps to one of the eight covered indications before billing

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Aetna Cholecystokinin Cholescintigraphy Coverage Criteria and Medical Necessity Requirements 2025

The Aetna CCK cholescintigraphy coverage policy is structured around a single core rule: CCK administration is medically necessary as an adjunct to cholescintigraphy when the claim meets any one of eight defined indications. You don't need to satisfy all eight — one is enough.

That's a relatively permissive structure. But "permissive" doesn't mean "document anything." Aetna will expect your documentation to clearly reflect which indication applies. A vague clinical note won't hold up at appeal.

Here's what the policy covers under CPT 78226 (hepatobiliary system imaging, including gallbladder when present) and CPT 78227 (with pharmacologic intervention, including quantitative measurement when performed):

Indication 1 — Confirming or excluding chronic calculous cholecystitis. CCK is covered after cholescintigraphy to confirm or rule out this diagnosis. This is the bread-and-butter indication for most practices.

Indication 2 — Confirming chronic acalculous cholecystitis. CCK after cholescintigraphy is covered to confirm this diagnosis. Note the difference in framing: for calculous cholecystitis, the policy covers both confirmation and exclusion. For chronic acalculous, the policy specifies confirmation only.

Indication 3 — Differentiating common duct obstruction from normal hypertonic sphincter of Oddi. CCK is covered after cholescintigraphy to make this distinction. This is an important diagnostic step that avoids more invasive testing.

Indication 4 — Excluding acute acalculous cholecystitis. CCK is covered after cholescintigraphy to rule out this condition. Strong clinical documentation of the presenting symptoms will support medical necessity here.

Indication 5 — Diagnosing sphincter of Oddi dysfunction non-invasively. CCK is covered during cholescintigraphy — not just after — as a non-invasive diagnostic method. The timing distinction matters for how you sequence and document the procedure.

Indication 6 — Evaluating biliary symptoms with negative workup. If a patient has biliary symptoms but no evidence of biliary disease on ultrasound or prior scintigraphy, CCK-augmented cholescintigraphy is covered. This is one of the more nuanced indications because it requires prior negative imaging to be documented.

Indication 7 — Shortening the exam duration. CCK is covered prior to cholescintigraphy as an alternative to delayed imaging. This allows the exam to finish in 60 minutes instead of three to four hours. It's an operational indication, and the clinical value is real — but you still need to document the clinical rationale.

Indication 8 — Emptying the gallbladder in fasting patients. If a patient has fasted more than 24 hours, CCK given prior to cholescintigraphy empties the gallbladder so imaging can proceed. Document the fasting duration in the record. Without it, this indication won't hold up to review.

The policy doesn't explicitly mention prior authorization requirements for these services. That said, complex nuclear medicine studies often trigger utilization management review with Aetna. Check the specific plan and benefit design before assuming no prior auth is needed. If you're unsure, call Aetna's provider line or loop in your billing consultant before the procedure.

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Coverage Indications at a Glance

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Aetna CCK Cholescintigraphy Billing Guidelines and Action Items 2025

These aren't suggestions. The effective date of September 26, 2025 is already in the rearview. If you haven't audited your charge capture for this service, start now.

Copy Action Items

The real issue with CCK cholescintigraphy billing is documentation granularity. The clinical team may know exactly why they did the study. But if the procedure note doesn't mirror the policy language, reimbursement is at risk. Close that gap now.

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CPT, HCPCS, and ICD-10 Codes for CCK Cholescintigraphy Under CPB 0266

Covered CPT Codes (When Selection Criteria Are Met)

Code	Type	Description Copy
78226	CPT	Hepatobiliary system imaging, including gallbladder when present
78227	CPT	Hepatobiliary system imaging with pharmacologic intervention, including quantitative measurement(s) when performed

Covered HCPCS Codes (When Selection Criteria Are Met)

Code	Type	Description Copy
J2805	HCPCS	Injection, sincalide, 5 mcg
J2806	HCPCS	Injection, sincalide (Maia), not therapeutically equivalent to J2805, 5 micrograms

Important: Aetna explicitly designates J2806 as not therapeutically equivalent to J2805. Don't substitute one for the other. Bill the code that matches the product dispensed and administered.

Key ICD-10-CM Diagnosis Codes

The full policy includes 125 ICD-10-CM codes. The K80.x family (cholelithiasis) represents the largest block. Below are the codes confirmed in the policy data. Use the most specific code available for the documented condition.

The full list of 125 ICD-10-CM codes is available in the complete policy at app.payerpolicy.org/p/aetna/0266. Run your diagnosis codes against that list before billing. An unrecognized diagnosis code is one of the fastest ways to get a claim denial on a technically covered service.

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