Clinical Trials – — A003 | CIGNA Coverage Update

Cigna modified Policy A003 covering clinical trial billing, effective December 6, 2025. Here's what billing teams need to do.

Cigna Healthcare updated its clinical trials coverage policy (A003) to clarify which routine patient care costs qualify for reimbursement when your patient enrolls in an approved clinical trial. The policy directly affects claims billed under HCPCS codes S9988, S9990, and S9991 — the three phase-specific trial billing codes — and draws a hard line around what won't be paid, including S9992 for transportation, S9994 for lodging, and S9996 for meals. If your practice treats oncology, neurology, cardiology, or any other specialty that enrolls patients in trials, this coverage policy update should be on your radar now.

Quick-Reference Table

Cigna Clinical Trial Coverage Criteria and Medical Necessity Requirements 2025

The A003 Cigna clinical trials coverage policy covers what the policy calls "Routine Patient Care Costs/Services." The definition matters more than it sounds. Routine costs are items and services that Cigna would cover for a patient who is not in a clinical trial. If it wouldn't be covered outside the trial, it doesn't become covered because of the trial.

That framing is your first medical necessity checkpoint. Before you bill anything under S9988 (Phase I), S9990 (Phase II), or S9991 (Phase III), ask: would this service pass Cigna's standard medical necessity review for a non-trial patient? If the answer is no, the trial doesn't save the claim.

The policy extends routine cost coverage to three additional service categories. First, services required for clinically appropriate monitoring of the investigational drug, device, item, or service. Second, services provided to prevent complications from the investigational intervention. Third, reasonable and necessary care arising from the investigational intervention — including diagnosis and treatment of complications.

That third category is where most billing teams undercharge. If a patient in a Phase II trial develops a complication from the investigational drug and you treat it, that treatment is a covered routine cost under A003. Document the link between the complication and the investigational intervention. Without that documentation, Cigna has grounds for a claim denial on medical necessity.

Cigna's policy lists concrete examples of covered routine services: radiological services, laboratory services, intravenous therapy, anesthesia services, hospital services, physician services, office visits, room and board, and medical supplies. These are your anchor services. Anything that fits this list and would be covered outside the trial qualifies for reimbursement.

The policy applies to "qualified individuals" under a "standard benefit plan administered by Cigna." Check the patient's plan type before submitting. Self-funded plans administered by Cigna may have different carve-outs. When in doubt about plan applicability, check prior authorization requirements with Cigna directly before the claim goes out. A003 does not explicitly state prior authorization is required for all trial services, but your standard Cigna prior auth rules for the underlying service still apply.

Cigna Clinical Trial Billing Exclusions and Non-Covered Indications

This is where the policy gets expensive if you're not paying attention. Cigna explicitly excludes several categories under A003, and they use specific HCPCS codes to define what they won't pay.

Transportation costs billed under S9992 are not covered. That includes fares to and from the trial location and local transportation. Lodging billed under S9994 — hotel charges for the participant and one caregiver — is not covered. Meals billed under S9996 for the participant and companion are not covered. These three exclusions are clean and consistent: Cigna covers clinical care, not logistical support.

Four procedure-specific HCPCS codes are also in the "Not Covered" group. G0276 covers blinded procedures for lumbar stenosis using percutaneous image-guided lumbar decompression (PILD) or placebo. G0293 covers noncovered surgical procedures using conscious sedation, regional, general, or spinal anesthesia in a Medicare qualifying clinical trial. G0294 covers noncovered procedures using no anesthesia or local anesthesia only in a Medicare qualifying clinical trial. G2000 covers blinded administration of convulsive therapy — either electroconvulsive therapy (ECT) or a current variation — when used as a blinded procedure.

The G-codes tell you something important about who this policy is really aimed at: providers billing Medicare-adjacent clinical trial procedures. If your practice bills G0293 or G0294, you're already dealing with the "noncovered" designation in the code descriptor itself. Cigna's A003 coverage policy formalizes that exclusion. Don't bill these expecting payment. If you're unsure how G0276 or G2000 interact with your specific trial protocol, loop in your compliance officer before the effective date passes.

Coverage Indications at a Glance

Cigna Clinical Trial Billing Guidelines and Action Items 2025

CPT, HCPCS, and ICD-10 Codes for Clinical Trials Under Policy A003

Covered HCPCS Codes (When Medical Necessity Criteria Are Met)

Not Covered HCPCS Codes Under A003

Key ICD-10-CM Diagnosis Codes