TL;DR: Cigna Healthcare modified MM 0073 for Phase II outpatient cardiac rehabilitation, effective September 26, 2025. Here's what changes for billing teams.
Cigna Healthcare updated its cardiac rehabilitation coverage policy under MM 0073 in Cigna's coverage system. The policy governs Phase II outpatient cardiac rehab services billed after facility discharge. CPT codes 93797 and 93798 remain the path to reimbursement — but HCPCS codes G0422, G0423, and S9472 are explicitly designated not medically necessary. If your team has been billing intensive cardiac rehab or non-physician per-diem codes to Cigna, this update puts you on notice.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | Cigna Healthcare |
| Policy | Cardiac Rehabilitation (Phase II Outpatient) |
| Policy Code | MM 0073 |
| Change Type | Modified |
| Effective Date | September 26, 2025 |
| Impact Level | High |
| Specialties Affected | Cardiology, cardiac rehab programs, outpatient rehab facilities |
| Key Action | Remove G0422, G0423, and S9472 from your Cigna charge capture for cardiac rehab — these codes will not be reimbursed |
Cigna Cardiac Rehabilitation Coverage Criteria and Medical Necessity Requirements 2025
The Cigna cardiac rehabilitation coverage policy under MM 0073 draws a clear line. CPT 93797 and CPT 93798 are covered — when medical necessity criteria are met. Everything else in this code set is not.
CPT 93797 covers physician or other qualified health care professional services for outpatient cardiac rehabilitation without continuous ECG monitoring. CPT 93798 covers the same services with continuous ECG monitoring. Both fall under the "considered medically necessary when criteria in the applicable coverage policy are met" designation. That language matters. Cigna will deny claims that don't meet those criteria, and the policy doesn't give you a pass just because the patient completed a hospital stay.
This coverage policy applies specifically to Phase II cardiac rehab — the outpatient phase that follows inpatient or facility discharge. Phase I (inpatient) and Phase III (maintenance) are not the subject of MM 0073. Make sure your team is applying this policy only to the correct phase.
Prior authorization requirements for cardiac rehabilitation billing under Cigna vary by plan. Check the specific member's benefit plan before assuming prior auth isn't needed. Some Cigna commercial plans require prior authorization for ongoing outpatient rehab sessions, and a missed auth is a fast path to claim denial.
For medical necessity, Cigna's framework follows standard qualifying diagnoses — think post-MI, coronary artery bypass surgery, stable angina, heart valve repair or replacement, and heart or heart-lung transplant. The policy doesn't list specific ICD-10 codes in the data provided, but your documentation needs to clearly support the qualifying cardiac condition. Weak documentation on the referring diagnosis is one of the top reasons cardiac rehab claims get denied.
Cigna Cardiac Rehabilitation Exclusions and Non-Covered Indications
This is where the September 26, 2025 update has real financial exposure for some programs.
Three codes are explicitly designated "not medically necessary" under MM 0073:
| # | Excluded Procedure |
|---|---|
| 1 | G0422 — Intensive cardiac rehabilitation with or without continuous ECG monitoring with exercise, per session |
| 2 | G0423 — Intensive cardiac rehabilitation with or without continuous ECG monitoring, without exercise, per session |
| 3 | S9472 — Cardiac rehabilitation program, non-physician provider, per diem |
Cigna's position on intensive cardiac rehabilitation (ICR) codes G0422 and G0423 is a hard no. These codes were developed primarily for Medicare's intensive cardiac rehab benefit, which covers qualifying programs like the Ornish or Pritikin programs under a specific CMS framework. Cigna is not following CMS here. If your program bills G0422 or G0423 to Cigna commercial plans, those claims will not be reimbursed.
S9472 is the other problem code. This per-diem code for non-physician cardiac rehab programs is also off the table under Cigna's coverage policy. Some billing teams use S9472 as an alternative when they don't have a supervising physician billing under 93797 or 93798. That approach doesn't work with Cigna.
The real issue with these exclusions: programs that run ICR alongside standard Phase II rehab sometimes batch-bill across both code types. If you're doing that with Cigna patients, you're mixing covered and non-covered codes on the same claim. That creates denial risk beyond just the excluded codes — it can flag the entire claim for review.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Phase II outpatient cardiac rehab — physician/QHP services without ECG monitoring | Covered | CPT 93797 | Medical necessity criteria must be met; verify prior auth by plan |
| Phase II outpatient cardiac rehab — physician/QHP services with continuous ECG monitoring | Covered | CPT 93798 | Medical necessity criteria must be met; verify prior auth by plan |
| Intensive cardiac rehabilitation — with exercise, per session | Not Covered | HCPCS G0422 | Designated not medically necessary by Cigna; do not bill |
| Intensive cardiac rehabilitation — without exercise, per session | Not Covered | HCPCS G0423 | Designated not medically necessary by Cigna; do not bill |
| Non-physician cardiac rehab program, per diem | Not Covered | HCPCS S9472 | Designated not medically necessary by Cigna; do not bill |
Cigna Cardiac Rehabilitation Billing Guidelines and Action Items 2025
| # | Action Item |
|---|---|
| 1 | Audit your charge capture before September 26, 2025. Pull every Cigna cardiac rehab claim in your charge capture system. Confirm that G0422, G0423, and S9472 are either removed or flagged as non-billable for Cigna. Any claim submitted with these codes after the effective date is a denial waiting to happen. |
| 2 | Route all Cigna cardiac rehab billing through CPT 93797 or CPT 93798. These are the only two codes Cigna recognizes as medically necessary under MM 0073. Choose based on whether continuous ECG monitoring was provided during the session. Document the monitoring level in the session notes — this is the clinical detail that supports the code selection. |
| 3 | Verify prior authorization requirements at the individual plan level. Cigna's cardiac rehabilitation billing guidelines don't standardize prior auth across all commercial plans. Check eligibility and benefits for each Cigna patient before the first session. If prior auth is required and you skip it, you'll face a medical necessity denial that's much harder to appeal than a simple coding fix. |
| 4 | Check your documentation against Cigna's medical necessity criteria. The qualifying cardiac diagnosis needs to be explicit in the referral and the patient's clinical record. Document the post-discharge status clearly — MM 0073 covers Phase II, which means you need evidence the patient completed a facility stay for a qualifying condition. Vague documentation is the fastest way to lose a cardiac rehab reimbursement appeal. |
| 5 | Review any ICR program billing practices immediately. If your organization runs an intensive cardiac rehabilitation program and you've been billing G0422 or G0423 to Cigna, stop. Pull claims submitted in the last 90 days and assess your denial exposure. If the volume is significant, loop in your billing consultant before the September 26, 2025 effective date — there may be corrected claims to file or appeals to manage. |
| 6 | Don't use S9472 as a workaround for non-physician services. If your cardiac rehab sessions are supervised by exercise physiologists or other non-physician providers, that doesn't create a path to S9472 reimbursement under Cigna. The covered codes — 93797 and 93798 — require a physician or other qualified health care professional to bill. Understand your supervision model and make sure it aligns with Cigna's requirements. |
| 7 | Flag mixed-code claims for manual review. If any of your claims mix CPT 93797 or 93798 with G0422, G0423, or S9472, those claims need a human review before submission. Mixed billing on cardiac rehab to Cigna is a clean path to claim denial and potential audit exposure. |
CPT and HCPCS Codes for Cardiac Rehabilitation Under Policy MM 0073
Covered CPT Codes (When Medical Necessity Criteria Are Met)
| Code | Type | Description |
|---|---|---|
| 93797 | CPT | Physician or other qualified health care professional services for outpatient cardiac rehabilitation without continuous ECG monitoring |
| 93798 | CPT | Physician or other qualified health care professional services for outpatient cardiac rehabilitation with continuous ECG monitoring |
Not Covered / Non-Medically Necessary HCPCS Codes
| Code | Type | Description | Reason |
|---|---|---|---|
| G0422 | HCPCS | Intensive cardiac rehabilitation; with or without continuous ECG monitoring with exercise, per session | Considered not medically necessary by Cigna Healthcare |
| G0423 | HCPCS | Intensive cardiac rehabilitation; with or without continuous ECG monitoring, without exercise, per session | Considered not medically necessary by Cigna Healthcare |
| S9472 | HCPCS | Cardiac rehabilitation program, non-physician provider, per diem | Considered not medically necessary by Cigna Healthcare |
No ICD-10-CM codes are listed in the MM 0073 policy data. Your diagnosis coding must reflect a qualifying cardiac condition — but the policy does not enumerate specific ICD-10 codes as coverage triggers. Document the clinical basis carefully and align with Cigna's medical necessity standards.
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