Echo transthoracic
CPT 93304 covers a transthoracic echocardiogram, which is an ultrasound test that uses sound waves to create moving pictures of your heart through the chest wall. This code represents the professional interpretation and report of the echo images.
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
Billing tips
Always verify whether you own the equipment or are billing in a facility. Bill the global code without modifiers only when you own the equipment and perform both technical and professional components
Impact: $146.85 global payment versus split payments with 26/TC modifiers that must equal the same total
Document complete views obtained and any limitations. Incomplete studies due to body habitus or patient cooperation should be documented and may require modifier 52 or 53
Impact: Reduced payment of 50-70% with modifier 52; prevents denials for incomplete documentation
Ensure medical necessity is clearly documented in the ordering physician's notes and your interpretation references the clinical indication. Link to appropriate ICD-10 codes
Impact: Prevents medical necessity denials which result in 100% payment loss; accounts for 20-30% of echo denials
Do not bill 93304 with a complete stress echo on the same date. Stress echocardiography codes (93350-93352) are comprehensive and include the baseline images
Impact: Prevents unbundling denials and potential fraud allegations; recovery of overpayments could exceed $150 per occurrence
Bill 93304 separately from cardioversion, pacemaker checks, or E/M services when documented as distinct and medically necessary with modifier 59 or 25 as appropriate
Impact: Secures additional $100-300 in reimbursement when properly documented and coded
For serial echos on same day, document clinical change warranting repeat study and use modifier 76. Hospital protocols requiring immediate repeat for quality do not qualify
Impact: Enables second payment of $146.85 when medically justified; automatic denial without modifier and documentation
Common denials
Medical necessity not established - payer deems echo not justified based on diagnosis codes or clinical information provided
How to appeal: Submit clinical notes demonstrating signs/symptoms warranting echo, cite specialty society guidelines (ASE/ACC) for appropriate use criteria matching patient's presentation, provide comparative documentation if monitoring known condition
Frequency limitation exceeded - many payers limit routine echos to once per 6-12 months without documented clinical change
How to appeal: Document specific clinical change, new symptoms, medication changes requiring reassessment, or acute event. Provide previous echo report showing interval comparison is medically necessary. Reference payer's own policy exceptions
Bundling with stress test or other cardiac imaging performed same day
How to appeal: Demonstrate the resting echo (93304) was medically distinct from stress imaging, performed for different indication, or represents pre-procedure baseline required for patient safety. Submit operative reports and time-stamped documentation
Missing or incomplete interpretation report - technical component performed but professional component documentation insufficient
How to appeal: Submit complete signed and dated interpretation report including all required elements: image quality, chamber dimensions, wall motion assessment, valve evaluation, estimated ejection fraction, comparison to priors if available, and clinical correlation with impression
Frequently asked questions
What is the Medicare reimbursement rate for CPT 93304 in 2025?
The 2025 Medicare national average payment for CPT 93304 is $146.85 for both facility and non-facility settings. This represents the global payment when both technical and professional components are performed by the same entity. Actual payment may vary based on geographic location and local MAC adjustments.
Can I bill CPT 93304 with modifier 26 for reading an echo performed at another facility?
Yes, when you only interpret images acquired at another facility or by a separate technical provider, you should bill 93304-26 for the professional component only. The facility performing the technical component bills 93304-TC. The sum of both components equals the global fee.
How often can CPT 93304 be billed for the same patient?
There is no absolute Medicare frequency limit for 93304, but medical necessity must be established for each study. Most payers question routine repeat echos within 6-12 months without documented clinical change, new symptoms, or interval cardiac events. Serial monitoring for specific conditions may be covered with proper documentation.
What diagnosis codes support medical necessity for CPT 93304?
Common supporting ICD-10 codes include I50.x (heart failure), I48.x (atrial fibrillation), I34-I39 (valvular diseases), I25.x (ischemic heart disease), R07.x (chest pain), R06.0x (dyspnea), Z95.x (cardiac device status), and I42.x (cardiomyopathy). The diagnosis must match the clinical indication documented in the order and interpretation.
Can CPT 93304 be billed on the same day as a stress echocardiogram?
No, you should not bill 93304 separately with stress echo codes (93350-93352) as the stress echo codes are comprehensive and include both baseline and post-stress imaging. Billing both constitutes unbundling and will result in denial or recoupment.
What are the RVU values for CPT 93304 in 2025?
For 2025, CPT 93304 has a work RVU of 0.75, non-facility PE RVU of 3.75, facility PE RVU of 3.75, and malpractice RVU of 0.04, totaling 4.54 RVUs. These values are multiplied by the 2025 conversion factor of 32.3465 to determine Medicare payment.
Do I need to document all cardiac structures to bill CPT 93304?
Yes, CPT 93304 represents a complete transthoracic echocardiogram and requires documentation of all cardiac chambers, all four valves, ventricular function, and pericardium. If the study is limited or incomplete due to technical factors, document the limitation and consider modifier 52 for reduced services, which will result in reduced reimbursement.