CPT code 93304 represents a limited or follow-up transthoracic echocardiography study used to obtain focused cardiac images through the chest wall for patients born with heart defects. It is a targeted ultrasound exam that addresses discrete clinical concerns and does not attempt to document all structures included in a complete echocardiogram. The service carries both professional and technical components and is commonly performed in echocardiography labs, outpatient hospital settings, and specialty clinics.

Key national payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise briefing on the clinical context for use of 93304, how this limited echo differs from a full transthoracic study, and where it is typically delivered. The publication also summarizes common modifiers associated with split professional/technical billing, outlines typical sites of service, and identifies gaps where input data was not provided.

This summary is intended to inform stakeholders about the code’s purpose, common billing configurations, and the practical clinical scenarios driving utilization. Data not available in the input is noted where applicable.