Doppler echo complete
CPT 93320 covers a complete Doppler echocardiogram, which is an ultrasound test that uses sound waves to create moving pictures of your heart and measure blood flow through its chambers and valves.
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
Billing tips
Always bill 93320 in conjunction with the base echocardiography code (93303-93317) as it is an add-on code for Doppler evaluation
Impact: Prevents automatic denial; 93320 alone will be rejected as it requires a primary echo procedure code
Document all Doppler modalities used (pulsed-wave, continuous-wave, color flow) and specific structures evaluated to support 'complete' designation
Impact: Differentiates from limited Doppler studies and supports the $48.52 reimbursement versus potential downcoding
Verify whether your facility bills globally or splits professional/technical components using modifiers 26/TC
Impact: Component billing errors can result in 50-100% payment loss; proper modifier use ensures correct $48.52 allocation
Do not bill 93320 with 93325 (Doppler color flow velocity mapping) as 93325 is included in the complete Doppler study
Impact: Prevents bundling denials and potential compliance issues; billing both typically results in $0 payment for 93325
Link appropriate ICD-10 codes documenting medical necessity for Doppler assessment, especially for valvular or congenital conditions
Impact: Reduces medical necessity denials; proper diagnosis coding can improve first-pass payment rate by 15-25%
Check payer-specific policies on frequency limitations for repeat Doppler studies, especially for serial valve assessments
Impact: Some payers limit frequency to once per 90 days without additional justification; proactive authorization can prevent $48.52 denials
Common denials
Billed without base echocardiography procedure code - 93320 is an add-on code requiring a primary echo service
How to appeal: Resubmit claim with appropriate base echo code (93303-93317) or provide documentation showing base code was billed separately. Include operative note showing complete echo was performed with Doppler as additional component.
Medical necessity not established - payer questions need for complete Doppler evaluation versus limited study
How to appeal: Submit clinical documentation showing specific indications requiring comprehensive Doppler (valvular disease assessment, quantification of regurgitation/stenosis, shunt evaluation). Include ordering physician notes and prior studies showing progression.
Bundled with other echocardiography services performed same day - payer considers inclusive of base code
How to appeal: Provide current CPT coding guidelines showing 93320 is separately reportable add-on code. Submit CMS NCCI edits documentation and payer's own policy manual showing 93320 is not bundled with the base echo code billed.
Duplicate service denial when billed with 93325 (color flow mapping) - considered inclusive
How to appeal: If both were truly performed as distinct services, provide detailed documentation. However, typically 93325 is included in 93320 complete study; consider withdrawing 93325 and accepting 93320 payment only to resolve.
Frequently asked questions
What is the Medicare reimbursement rate for CPT 93320 in 2025?
The 2025 Medicare national average payment for CPT 93320 is $48.52 for both facility and non-facility settings, based on 1.5 total RVUs and the conversion factor of 32.3465.
Can CPT 93320 be billed alone or does it require another code?
CPT 93320 cannot be billed alone; it is an add-on code that must be reported with a primary echocardiography procedure code such as 93303, 93304, 93306, 93307, 93308, or others from the transthoracic or transesophageal echo family.
What is the difference between CPT 93320 and 93325?
CPT 93320 represents a complete Doppler echocardiographic study including all modalities (pulsed, continuous, and color flow), while 93325 is specifically for Doppler color flow velocity mapping add-on. The complete study (93320) is more comprehensive and includes color flow, so both should not typically be billed together.
How many RVUs is CPT code 93320 worth in 2025?
CPT 93320 has 1.5 total RVUs in 2025, consisting of 0.38 work RVUs, 1.1 practice expense RVUs (both facility and non-facility), and 0.02 malpractice RVUs according to the CMS Physician Fee Schedule.
Do I need modifier 26 when billing CPT 93320?
Modifier 26 is required only if you are billing for the professional component (interpretation only) separately from the technical component. If billing the complete service globally, no modifier is needed. This typically depends on whether you are in a hospital or office setting.
What diagnosis codes support medical necessity for CPT 93320?
Common supporting diagnoses include valvular disorders (I34.x-I37.x), heart failure (I50.x), congenital heart defects (Q20.x-Q24.x), cardiac murmurs (R01.x), cardiomyopathy (I42.x), and endocarditis (I33.x). Documentation must show why Doppler assessment was medically necessary.
Can CPT 93320 be billed more than once per day?
Yes, but only with appropriate documentation and modifier usage (typically modifier 76 for repeat by same physician or 77 for different physician). Medical necessity must clearly demonstrate why repeat Doppler evaluation was required, such as assessment after intervention or clinical deterioration.