Transthoracic Echocardiography in Children - (0523) — MM 0523 | CIGNA Coverage Update

Cigna modified MM 0523 — its pediatric transthoracic echocardiography coverage policy — effective February 14, 2026. Here's what billing teams need to do.

Cigna Healthcare updated Coverage Policy MM 0523, which governs non-stress transthoracic echocardiography (TTE) for patients under age 18. The modified policy covers 10 CPT codes (93303, 93304, 93306, 93307, 93308, 93319, 93320, 93321, 93325, and 93356) and five HCPCS codes (C8921, C8922, C8923, C8924, and C8929). If your practice bills pediatric cardiology or manages TTE claims for a children's hospital, this coverage policy change affects your charge capture and documentation workflow starting February 14, 2026.

Quick-Reference Table

Cigna Pediatric Transthoracic Echocardiography Coverage Criteria and Medical Necessity Requirements 2026

The Cigna transthoracic echocardiography coverage policy (MM 0523) applies exclusively to patients under age 18. This is a non-stress TTE policy — stress echocardiography in children is governed separately.

All 10 CPT codes and five HCPCS codes under MM 0523 are considered medically necessary when the applicable selection criteria are met. That phrase — "when criteria in the applicable coverage position are met" — is doing a lot of work here. Cigna is telling you that code submission alone does not determine coverage. Your documentation must map directly to the criteria.

The covered codes span a wide range of TTE modalities. CPT 93303 and 93304 cover complete and follow-up/limited TTE studies for congenital cardiac anomalies specifically. CPT 93306, 93307, and 93308 cover standard real-time 2D echocardiography with M-mode recording — complete, without spectral or color Doppler, and follow-up or limited, respectively [descriptions truncated in source; verify full text against AMA CPT codebook]. CPT 93319 covers 3D echocardiographic imaging and postprocessing performed during transesophageal echocardiography or during transthoracic echocardiography — it is not a TTE-exclusive code. CPT 93320 and 93321 cover Doppler pulsed wave and continuous wave studies as add-on services [descriptions truncated in source]. CPT 93325 covers Doppler color flow velocity mapping, also an add-on. CPT 93356 covers myocardial strain imaging using speckle tracking — a technique increasingly used in pediatric oncology patients receiving cardiotoxic chemotherapy.

The five HCPCS codes (C8921–C8924 and C8929) cover contrast TTE variants. These are facility-side codes used primarily in outpatient hospital and ambulatory surgical center settings. If your organization bills on a UB-04, confirm your chargemaster maps contrast TTE studies to the correct C-code based on study type — congenital anomaly vs. standard real-time.

The ICD-10 diagnosis code list under MM 0523 is extensive — 1,843 codes total. That breadth signals that Cigna covers pediatric TTE across a wide range of clinical scenarios, from congenital heart disease to infectious endocarditis, sepsis, malignant neoplasms, and cardiomyopathy. The practical implication: your coders need to select a diagnosis code that falls within this list. A valid CPT code paired with an ICD-10 code outside MM 0523's covered list is a claim denial waiting to happen.

Prior authorization requirements are not addressed in MM 0523. Contact your Cigna provider relations representative or check the Cigna provider portal for plan-specific PA requirements.

Coverage Indications at a Glance

The policy summary confirms medical necessity coverage across a broad set of pediatric diagnoses. The table below summarizes the major clinical categories covered under MM 0523.

Cigna Pediatric Transthoracic Echocardiography Billing Guidelines and Action Items 2026

The effective date is February 14, 2026. That's your hard deadline for getting workflows aligned.

CPT, HCPCS, and ICD-10 Codes for Pediatric Transthoracic Echocardiography Under MM 0523

Covered CPT Codes (When Medical Necessity Criteria Are Met)

Covered HCPCS Codes (When Medical Necessity Criteria Are Met)

Key ICD-10-CM Diagnosis Codes Covered Under MM 0523

The full covered diagnosis list runs 1,843 codes. The table below covers the primary clinical categories. Pull the complete list from the MM 0523 policy document before finalizing your claim edits.

The full list of 1,843 covered ICD-10-CM codes is available in the MM 0523 policy document. Cross-reference your diagnosis codes against the complete list before submitting pediatric TTE claims.