Billing code 93325: Color flow DopplerMedicare rate & RVUs

Medicare pays $23.71 for 93325 nationally in the office. Local office rates run $20.70–$33.42.

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 93325 covers

Color flow Doppler overlays blood flow direction and velocity onto two-dimensional echo images, helping identify valvular regurgitation, stenotic jets, intracardiac shunts, and prosthetic valve flow. Sonographers acquire images in cardiology offices and hospitals; cardiologists interpret them, while fetal studies may involve pediatric cardiologists or maternal-fetal medicine specialists. Mapping accompanies a qualifying transthoracic, transesophageal, stress, or fetal echocardiogram whose primary code excludes color flow.

Report this add-on with a qualifying primary echo; it is paid within that procedure’s global period. Examples include limited TTE (93308), complete TTE with color Doppler alone (93307), congenital TTE (93303 or 93304), TEE (93312 or 93315), stress echo (93350 or 93351), and fetal echo (76825 or 76826). When both spectral and color Doppler accompany a complete standard TTE, report 93306 instead of separate Doppler add-ons. Document the primary study and color flow findings, such as a regurgitant jet or shunt direction. Report one unit for the color mapping, not one per valve or jet. Modifier 26 identifies the interpretation, modifier TC identifies equipment and staff, and billing without either modifier represents the global service.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

Where 93325 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

93325 rates by state

Office rate range in each state. Select a state to see its payment localities.

How the 93325 rate is calculated

Each of 93325’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for 93325

The CMS indicators that decide how 93325 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

93325 compared with similar codes

How to choose

93306Echocardiogram (TTE)

93306 is a complete TTE that includes both spectral and color Doppler. Do not add 93325 to it.

93320Spectral Doppler

93320 covers complete spectral Doppler; 93325 covers color flow mapping. Both may be reported when both techniques accompany a qualifying primary echo.

93321Doppler echo

93321 covers limited or follow-up spectral Doppler. 93325 has no complete-versus-limited distinction and covers color flow mapping.

93307Transthoracic echo

93307 is a complete TTE without Doppler. Add 93325 when color flow mapping alone is performed; use 93306 when the complete TTE includes both spectral and color Doppler.

Codes related to 93325

Related codes aren’t interchangeable: bill the code that matches the service performed.

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates