CPT 93307 is the complete transthoracic echocardiogram performed without spectral or color flow Doppler. It is the least understood member of the echo family. It is the correct code only when Doppler was not done, and it is still routinely paired with Doppler add-on codes that CPT does not allow alongside it.
What CPT 93307 covers
93307 is transthoracic echocardiography, real-time with image documentation (2D), including M-mode recording when performed, complete, without spectral or color flow Doppler.
The word doing the work is "complete". The structural requirements are the same as 93306: an attempted evaluation of the left and right atria, the left and right ventricles, the aortic, mitral and tricuspid valves, the pericardium and the adjacent portions of the aorta. The only difference is the absence of Doppler.
Reimbursement context
93307 pays less than 93306 because it excludes the Doppler work. When Doppler genuinely was performed on a complete study, the answer is 93306, not 93307 plus add-on codes.
2026 Medicare RVUs for CPT 93307
| CPT 93307: 2026 Medicare RVUs (national, before GPCI) | ||||||
|---|---|---|---|---|---|---|
| Line | Work | PE, non-facility | PE, facility | Malpractice | Total, non-facility | Total, facility |
| Global (no modifier) | 0.90 | 3.18 | NA | 0.05 | 4.13 | NA |
| Professional (modifier 26) | 0.90 | 0.36 | 0.36 | 0.03 | 1.29 | 1.29 |
| Technical (modifier TC) | 0.00 | 2.82 | NA | 0.02 | 2.84 | NA |
Source: CMS CY 2026 PFS Relative Value File, RVU26D (October release, published 08/26/2026). RVUs are national and unadjusted; commercial payers set their own rates.
In the 2026 CMS relative value file, CPT 93307 carries 0.90 work RVUs and 4.13 total RVUs when billed globally in a non-facility setting. The global line is NA in a facility, because there the physician bills the professional component only and the facility bills the technical side. Its PC/TC indicator is 1: the code splits into a professional component (modifier 26, 1.29 total RVUs) and a technical component (modifier TC, 2.84 total RVUs), and the global line is billed only when one entity does both. Its global indicator is XXX: the surgical global period concept does not apply. Across the transthoracic and stress echo codes, work RVUs run from 0.52 (93308) to 1.71 (93351); 93307 sits at 0.90.
To turn RVUs into payment, each component is multiplied by your locality's geographic practice cost index, the three are added, and the sum is multiplied by the 2026 conversion factor: $33.4009, or $33.5675 for qualifying APM participants (CMS-1832-F; CMS fact sheet). The CMS Physician Fee Schedule Look-Up Tool runs that calculation for your locality.
Documentation requirements
- An indication explaining why the study was ordered, coded specifically.
- Findings for each required structure, or an explicit statement of why one could not be adequately visualised.
- Chamber dimensions, wall motion and ejection fraction with the method used.
- An explicit statement that Doppler was not performed, so the choice of 93307 over 93306 is visible in the record.
- Retained images available for review.
- A signed interpretation naming the study performed.
Medicare contractor billing articles. Each Medicare Administrative Contractor publishes its own billing and coding articles for this service, and the covered diagnoses differ by jurisdiction. Active examples in the CMS Medicare Coverage Database, checked September 28, 2026: A57306 (Transthoracic Echocardiography (TTE), CGS), A56781 (Transthoracic Echocardiography (TTE), Wellpoint Federal) and A56625 (Echocardiography, Palmetto GBA). Use the article from the contractor that processes your claims.
Common denials and the exact fix
Doppler add-ons billed with 93307
CPT instructs that 93307 is not reported with 93320, 93321 or 93325, so those lines deny. This is a code-selection error, not a bundling edit a modifier can fix.
Fix: where both spectral and color flow Doppler were performed and documented on a complete study, recode to 93306 and remove the add-on lines.
Under-reporting: 93307 billed when Doppler was performed
This does not deny, which is why it persists for years. Every affected study loses the Doppler value.
Fix: if spectral and color flow Doppler were performed as part of a complete study, the correct code is 93306. Adding Doppler add-ons to 93307 is not an alternative, because CPT does not allow that combination. What is not defensible is billing 93307, with or without add-ons, when a complete study with Doppler was done.
93307 used as a fallback for a weak complete report
An incomplete structural exam is 93308. Using 93307 to soften a documentation gap misstates what was performed.
Fix: code the study the report supports. If required structures were not addressed and no reason was given, that is a limited study.
Missing or mismatched 26 / TC
The same split-billing rule applies as on 93306. A global code from a facility place of service denies.
Fix: align modifier, place of service and equipment ownership.
CO-50: diagnosis does not support the echo
Screening-flavoured indications draw medical-necessity denials, and most MACs publish an echocardiography LCD.
Fix: code the specific cardiac indication and check the applicable LCD before appealing.
Modifier rules
- 26 / TC: split by setting, equipment ownership and place of service.
- Doppler add-ons: 93320, 93321 and 93325 are not reported with 93307, and no modifier changes that.
- 76 / 77: repeat study with a documented clinical trigger.
- 59 / XE / XP / XS / XU: rarely applicable on a diagnostic echo, and never a route to billing Doppler add-ons with 93307.
NCCI bundling edits
- 93307 with 93320, 93321 or 93325: not reported together per CPT. A complete study with Doppler is 93306.
- 93307 with 93306: one study, one code.
- 93307 with 93308: one study, one code.
- 93307 with 93350 or 93351: stress echocardiography includes the echo imaging for that study.
Frequently asked questions
When is 93307 correct instead of 93306?
Can I bill 93320 and 93325 with 93307?
Is 93307 paid less than 93306?
Sources
American Medical Association, CPT 2026 Professional Edition.
Centers for Medicare & Medicaid Services, CY 2026 PFS Relative Value File RVU26D (October release): RVUs, PC/TC indicator and global period for CPT 93307.
Centers for Medicare & Medicaid Services, CY 2026 Physician Fee Schedule final rule, CMS-1832-F: conversion factors.
Centers for Medicare & Medicaid Services, National Correct Coding Initiative Policy Manual for Medicare Services and quarterly procedure-to-procedure edit tables.
Medicare Coverage Database billing and coding articles A57306, A56781, A56625.
CPT® is a registered trademark of the American Medical Association. Payer policy and NCCI edits change quarterly, so check your own contractor before submission. How we verify this guidance.
Related codes
- CPT 93306. Complete TTE with spectral and color flow Doppler.
- CPT 93308. Limited or follow-up echo.
- CPT 93320. Spectral Doppler add-on.
Related reading
- Cardiology billing & RCM. How we scrub cardiology claims across diagnostics, cath lab, EP and remote monitoring.
- Echocardiography billing: complete vs. limited studies. What separates a defensible complete echo from a limited one.
- TC/26 modifier errors in cardiology. The split-billing mistakes that cost diagnostic practices the most.
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