TL;DR: Cigna Healthcare modified its clinical trials coverage policy (ad_a003_administrativepolicy_clinical_trials), effective December 6, 2025. Here's what billing teams need to do.
Cigna Healthcare updated Policy A003, its administrative coverage policy governing routine patient care costs during approved clinical trials. The change affects how billing teams should code and document services for enrolled patients — with covered services billed under HCPCS codes S9988, S9990, and S9991 for Phase I, II, and III trials respectively, and a separate group of codes including G0276, G0293, G0294, G2000, S9992, S9994, and S9996 explicitly listed as not covered. If your team bills clinical trial services for Cigna members, this 2025 update tightens the line between what gets reimbursed and what gets denied.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | Cigna Healthcare |
| Policy | Clinical Trials – (A003) |
| Policy Code | ad_a003_administrativepolicy_clinical_trials |
| Change Type | Modified |
| Effective Date | December 6, 2025 |
| Impact Level | High |
| Specialties Affected | Oncology, neurology, orthopedics, interventional pain, psychiatry, any specialty with clinical trial enrollment |
| Key Action | Audit your clinical trial charge capture and remove non-covered HCPCS codes (S9992, S9994, S9996, G0293, G0294, G0276, G2000) from claims for Cigna members before December 6, 2025 |
Cigna Clinical Trials Coverage Criteria and Medical Necessity Requirements 2025
The core of this Cigna clinical trials coverage policy is straightforward: Cigna covers routine patient care costs for qualified members enrolled in approved clinical trials — but only when those costs reflect services the plan would also cover outside a trial setting.
That's the medical necessity bar. If Cigna wouldn't cover a service for a non-enrolled member, it won't cover it just because the member is in a trial. The service has to clear two hurdles: it must be a routine care cost, and it must meet medical necessity criteria under the standard benefit plan.
Cigna's definition of "Routine Patient Care Costs/Services" under Policy A003 is specific. It includes services required to clinically monitor an investigational drug, device, item, or service. It also includes services to prevent complications from the investigational item, and reasonable and necessary care for diagnosing and treating complications that arise.
The policy gives 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 covered when they're incidental to trial participation — not because of the trial itself.
Clinical trial billing under this coverage policy does not require prior authorization for the routine care portion to be covered, but medical necessity documentation is essential. Your records must clearly separate what's routine patient care from what's investigational. Claims that blur that line are claim denial risks.
This policy applies to standard benefit plans administered by Cigna Healthcare. It is not a Medicare policy. Cigna's Cigna clinical trials coverage policy is distinct from CMS rules governing clinical trial billing under Medicare, though the underlying logic — cover the care, not the research — is similar.
Cigna Clinical Trials Exclusions and Non-Covered Indications
Seven HCPCS codes are explicitly listed as not covered under this policy. Four of them are procedural blinded-trial codes. Three cover participant logistics costs. All seven represent common billing mistakes in clinical trial settings.
The blinded and noncovered procedure codes are the ones most likely to generate claim denials if billed incorrectly:
| # | Excluded Procedure |
|---|---|
| 1 | G0276 covers blinded percutaneous image-guided lumbar decompression (PILD) for lumbar stenosis. Cigna doesn't cover this when billed as part of a clinical trial. |
| 2 | G0293 covers noncovered surgical procedures using conscious sedation, regional, general, or spinal anesthesia in a Medicare qualifying clinical trial. Not covered under Cigna's policy either. |
| 3 | G0294 covers noncovered procedures using no anesthesia or local anesthesia only, in a Medicare qualifying clinical trial. Same result — not covered. |
| 4 | G2000 covers blinded administration of convulsive therapy — electroconvulsive therapy (ECT) or its alternatives — in a clinical trial setting. Cigna won't pay for this under A003. |
The participant logistics codes are S9992, S9994, and S9996. These cover transportation to and from the trial location, lodging for the participant and one caregiver or companion, and meals for the participant and one caregiver or companion. None of these are covered under this Cigna clinical trials coverage policy.
These logistics codes sometimes show up on claims from practices that are trying to help patients understand what might be reimbursable. Pull them off Cigna claims. They're not covered, and billing them invites denials that delay reimbursement for the legitimate services on the same claim.
Coverage Indications at a Glance
| Indication / Service Type | Status | Relevant Codes | Notes |
|---|---|---|---|
| Routine care services for Phase I clinical trial participants | Covered | S9988 | Must meet medical necessity; service must be covered outside trial context |
| Routine care services for Phase II clinical trial participants | Covered | S9990 | Must meet medical necessity; service must be covered outside trial context |
| Routine care services for Phase III clinical trial participants | Covered | S9991 | Must meet medical necessity; service must be covered outside trial context |
| Monitoring of investigational drug/device/item | Covered | S9988, S9990, S9991 | Must be clinically appropriate monitoring; document necessity |
| Prevention of complications from investigational item | Covered | S9988, S9990, S9991 | Services must be preventive of trial-related complications |
| Diagnosis and treatment of complications from investigational item | Covered | S9988, S9990, S9991 | Reasonable and necessary care only |
| Radiology, lab, IV therapy, anesthesia, hospital, physician, office visits, room & board, medical supplies | Covered (when routine) | S9988, S9990, S9991 + applicable procedure codes | Must be services the plan would cover for non-trial members |
| Encounter for clinical research program comparison/control | Covered (diagnostic) | Z00.6 | Use to indicate clinical trial participation context |
| Blinded PILD procedure for lumbar stenosis | Not Covered | G0276 | Explicitly excluded under A003 |
| Noncovered surgical procedure with sedation/anesthesia in qualifying clinical trial | Not Covered | G0293 | Explicitly excluded under A003 |
| Noncovered procedure with no or local anesthesia in qualifying clinical trial | Not Covered | G0294 | Explicitly excluded under A003 |
| Blinded convulsive therapy (ECT or alternative) in clinical trial | Not Covered | G2000 | Explicitly excluded under A003 |
| Transportation to/from trial location | Not Covered | S9992 | Logistics costs are excluded |
| Lodging for participant and caregiver | Not Covered | S9994 | Logistics costs are excluded |
| Meals for participant and caregiver | Not Covered | S9996 | Logistics costs are excluded |
Cigna Clinical Trials Billing Guidelines and Action Items 2025
Policy A003 is modified, not new — but a modification is your trigger to audit. Here's what to do before and after the December 6, 2025 effective date.
| # | Action Item |
|---|---|
| 1 | Audit your charge capture for clinical trial encounters billed to Cigna. Pull claims from the past 90 days that include S9988, S9990, or S9991. Check whether any of the seven not-covered codes (G0276, G0293, G0294, G2000, S9992, S9994, S9996) appear on those same claims. If they do, you have a denial pattern waiting to happen. |
| 2 | Remove S9992, S9994, and S9996 from your Cigna charge capture templates. These logistics codes — transportation, lodging, and meals — are not covered under this policy. Some billing teams include them as informational. With Cigna, don't. They create billing noise and increase claim denial risk. |
| 3 | Confirm that every covered service on a clinical trial claim would also be covered for a non-trial member. This is the medical necessity test under Policy A003. If the answer is no, the service doesn't belong on the claim. Document the clinical rationale for each line item. |
| 4 | Use Z00.6 to flag clinical trial enrollment on claims. The ICD-10-CM code Z00.6 — Encounter for examination for normal comparison and control in clinical research program — is the proper diagnosis code to signal clinical trial context. Make sure it's in your encounter documentation workflow for trial patients. |
| 5 | Separate the investigational item from the routine care in your documentation. Your records need to show clearly what's investigational (not billable to Cigna) and what's routine care (billable). This separation is what protects you in a post-payment audit. |
| 6 | Train your front-end billing staff on the phase-specific codes. S9988 is Phase I, S9990 is Phase II, and S9991 is Phase III. These codes need to match the trial phase documented in the patient's record. A mismatch between the HCPCS code and the trial documentation is an easy audit flag. |
| 7 | If you bill G0276, G0293, G0294, or G2000 in any context, confirm those claims aren't going to Cigna under A003. These codes may be valid in other payer contexts, but Cigna's clinical trials coverage policy explicitly excludes them. If your practice performs blinded lumbar or ECT procedures in trial settings, loop in your compliance officer before the December 6, 2025 effective date to confirm your billing approach. |
| 8 | Check whether the clinical trial itself is "approved" under Cigna's definition. Policy A003 applies to approved clinical trials. Your documentation should confirm the trial's approval status. If you're unsure what Cigna accepts as an approved trial, your compliance officer or billing consultant needs to review this before you submit claims under this policy. |
| Previous Version | Current Version |
|---|---|
| Coverage is considered experimental and investigational for all indications | Coverage is considered medically necessary when specific criteria are met |
| Prior authorization is not required | Prior authorization is required for initial treatment |
| Documentation must include clinical history | Documentation must include clinical history |
| Re-review every 24 months | Re-review every 12 months with updated clinical documentation |
CPT, HCPCS, and ICD-10 Codes for Clinical Trials Under ad_a003_administrativepolicy_clinical_trials
Covered HCPCS Codes (When Medical Necessity Criteria Are Met)
| Code | Type | Description |
|---|---|---|
| S9988 | HCPCS | Services provided as part of a Phase I clinical trial |
| S9990 | HCPCS | Services provided as part of a Phase II clinical trial |
| S9991 | HCPCS | Services provided as part of a Phase III clinical trial |
Not Covered HCPCS Codes Under Policy A003
| Code | Type | Description | Reason |
|---|---|---|---|
| G0276 | HCPCS | Blinded procedure for lumbar stenosis, percutaneous image-guided lumbar decompression (PILD) or placebo | Explicitly listed as not covered under A003 |
| G0293 | HCPCS | Noncovered surgical procedure(s) using conscious sedation, regional, general, or spinal anesthesia in a Medicare qualifying clinical trial | Explicitly listed as not covered under A003 |
| G0294 | HCPCS | Noncovered procedure(s) using either no anesthesia or local anesthesia only, in a Medicare qualifying clinical trial | Explicitly listed as not covered under A003 |
| G2000 | HCPCS | Blinded administration of convulsive therapy procedure, either electroconvulsive therapy (ECT) or its alternative, in a clinical trial | Explicitly listed as not covered under A003 |
| S9992 | HCPCS | Transportation costs to and from trial location and local transportation costs (e.g., fares for taxi, bus, or other transportation) | Explicitly listed as not covered under A003 |
| S9994 | HCPCS | Lodging costs (e.g., hotel charges) for clinical trial participant and one caregiver/companion | Explicitly listed as not covered under A003 |
| S9996 | HCPCS | Meals for clinical trial participant and one caregiver/companion | Explicitly listed as not covered under A003 |
Key ICD-10-CM Diagnosis Codes
| Code | Description |
|---|---|
| Z00.6 | Encounter for examination for normal comparison and control in clinical research program |
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