Transthoracic Echocardiography in Adults - (0510) — MM 0510 | CIGNA Coverage Update

Cigna modified MM 0510 for transthoracic echocardiography in adults, effective February 14, 2026. Here's what billing teams need to do.

Cigna Healthcare updated its transthoracic echocardiography coverage policy under MM 0510, affecting 10 CPT codes (93303, 93304, 93306, 93307, 93308, 93319, 93320, 93321, 93325, and 93356) and five HCPCS codes (C8921, C8922, C8923, C8924, and C8929) for adult patients age 18 and older. The policy governs non-stress TTE studies and maps to 444 ICD-10-CM diagnosis codes spanning cardiac, oncologic, infectious, and systemic conditions. If your practice bills echocardiography to Cigna for adult patients, this coverage policy directly affects your charge capture, documentation requirements, and exposure to claim denial.

Quick-Reference Table

Cigna Transthoracic Echocardiography Coverage Criteria and Medical Necessity Requirements 2026

The Cigna transthoracic echocardiography coverage policy under MM 0510 covers non-stress TTE for adult patients age 18 and older when medical necessity criteria are met. Every CPT and HCPCS code in this policy — from the complete congenital study under CPT 93303 to myocardial strain imaging under CPT 93356 — sits in the "Considered Medically Necessary when criteria are met" group. There are no blanket covered codes. Every claim requires a qualifying diagnosis.

The breadth of the ICD-10-CM list (444 codes) signals that Cigna has mapped this policy carefully. Cardiac infections like meningococcal endocarditis (A39.51), viral myocarditis (B33.22), and candidal endocarditis (B37.6) qualify. So do systemic conditions with cardiac involvement — Chagas' disease (B57.0, B57.2), toxoplasma myocarditis (B58.81), and syphilitic heart conditions (A52.00–A52.06). Oncology indications span malignant neoplasms of the heart and mediastinum (C38.0–C38.8) through Hodgkin and non-Hodgkin lymphomas.

The real issue with this policy is that "criteria met" is load-bearing language. Cigna is not offering open-ended TTE reimbursement. Your documentation has to connect the clinical picture to a covered ICD-10 code and support why the study was ordered.

Whether Cigna requires prior authorization for TTE under this policy depends on the specific plan. Commercial and employer-sponsored Cigna plans vary. Check the member's benefit plan before scheduling, especially for follow-up or limited studies under CPT 93308 — those are the codes that draw scrutiny when documentation is thin.

Coverage Indications at a Glance

Cigna Transthoracic Echocardiography Billing Guidelines and Action Items 2026

1. Audit your active TTE charge capture against the February 14, 2026 effective date.
Pull all Cigna TTE claims from the last 90 days. Look for CPT 93306, 93307, 93308, and 93320/93321/93325 combinations. Flag any claims without a supporting ICD-10 from the 444-code list. Those are your denial risk candidates.

2. Confirm add-on code pairs are correctly linked.
CPT codes 93319, 93320, 93321, 93325, and 93356 are add-on codes. They cannot stand alone. If your charge capture is posting them without a base TTE code (93303, 93304, 93306, 93307, or 93308), fix that pairing before the next billing cycle.

3. Train your coders on the ICD-10 specificity this policy demands.
Coding sepsis without documenting cardiac involvement will not satisfy MM 0510. The policy supports A40.x and A41.x series codes, but your documentation has to show why a TTE was clinically indicated for that patient's sepsis presentation. "Rule out endocarditis" documented in the chart is doing real work here.

4. Check prior authorization requirements by plan before scheduling.
Cigna commercial plans are not uniform on prior auth for echocardiography. Call or check Cigna's provider portal for each member's plan before scheduling non-urgent TTEs. This is especially true for follow-up studies under CPT 93308 and congenital follow-ups under CPT 93304 — payers watch repeat studies closely.

5. Separate your HCPCS contrast codes from CPT non-contrast codes in facility billing.
HCPCS codes C8921 through C8929 cover TTE with contrast. CPT codes 93303 through 93308 cover studies without contrast (or where contrast is not the distinguishing factor). In hospital outpatient settings, you bill the HCPCS code. In physician office settings, you bill CPT. Mixing these will generate edits or denials.

6. Document clinical rationale for myocardial strain imaging separately.
CPT 93356 (speckle tracking-derived myocardial strain) is an add-on that Cigna will scrutinize. A generic "echo with strain" order won't cut it. The chart should explain why strain assessment was clinically necessary — chemotherapy monitoring, subclinical LV dysfunction evaluation, or a specific cardiomyopathy workup tied to a covered ICD-10.

7. For oncology-ordered studies, loop in your compliance officer if you're unsure.
The policy covers malignancies including breast cancer (C50.011–C50.922), lung cancer (C34.00–C34.92), lymphomas (C81–C86), and pericardial mesothelioma (C45.2). Cardio-oncology TTEs are legitimate and billable. But if your practice is ordering these without cardiology documentation of cardiac involvement, that's a documentation gap worth reviewing with your compliance officer before a Cigna audit surfaces it.

CPT, HCPCS, and ICD-10 Codes for Transthoracic Echocardiography Under MM 0510

Covered CPT Codes (When Medical Necessity Criteria Are Met)

Covered HCPCS Codes (When Medical Necessity Criteria Are Met)

Key ICD-10-CM Diagnosis Codes (Selected from 444 Total Covered Codes)

The full list contains 444 ICD-10-CM codes. The table below includes all codes specifically enumerated in the policy data. Ranges noted (e.g., A41.01–A41.9) cover all codes within those bounds.

364 additional ICD-10-CM codes are covered under this policy. Access the full list at app.payerpolicy.org.