CPT code 93303: Congenital echo, complete transthoracic study2026 Medicare rate & RVUs in Missouri
A complete transthoracic echocardiogram evaluates congenital heart abnormalities, such as septal defects or abnormal valve anatomy, using ultrasound imaging.
Medicare pays $196.14–$212.02 for 93303 in the office in Missouri, from Rest of Missouri to Metropolitan St. Louis, MO. Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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On this page 9 sections
What 93303 covers
This study uses an ultrasound probe on the chest to assess heart structure and function when congenital cardiac anatomy is present or suspected. A cardiologist or other qualified clinician interprets the images; the technical service is generally performed by trained cardiac sonography staff in a hospital, clinic, or imaging practice. It may be used for initial assessment or ongoing evaluation of congenital heart disease in children or adults.
Select this code for a complete transthoracic study focused on congenital cardiac abnormalities, rather than a limited follow-up examination or a standard study for acquired heart disease. The report should support the congenital indication and document a complete examination and interpretation. Bill the global service without a component modifier, or use modifier 26 for interpretation or TC for equipment and staff when those components are billed separately. CMS applies the cardiovascular diagnostic multiple procedure reduction to the technical component.
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 93303 pays more and less in Missouri
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
3 payment localities
$196.14 to $212.02
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Kansas City, MO | $209.68 | Unavailable |
| Metropolitan St. Louis, MO | $212.02 | Unavailable |
| Rest of Missouri | $196.14 | Unavailable |
How the 93303 rate is calculated
Each of 93303’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.
How the rate is built · 93303
RVUs × geographic indexes × conversion factor
Work1.27
1.27 RVUs× 1.000 GPCI
Practice expense5.26
5.26 RVUs× 1.000 GPCI
Malpractice0.07
0.07 RVUs× 1.000 GPCI
Adjusted RVUs
6.6000
Conversion factor
$33.4009
Medicare rate
$220.45
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 93303
The CMS indicators that decide how 93303 is paid alongside other services.
CMS payment indicators · 93303
Congenital echo, complete transthoracic study
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 6 | Diagnostic cardiovascular reduction applies to the technical component. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 1 | Diagnostic test with separate professional (26) and technical (TC) components. |
What modifiers do to the payment
Modifier 26 · payment effect
With and without the modifier
93303 without 26 · national office
$220.45
Congenital echo, complete transthoracic study
93303-26 · Professional component
$60.12
Pays only the interpretation and report.
93303 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- 93304Transthoracic echoCongenital, limited or follow-up
- Choose 93303 for a complete congenital transthoracic examination. Choose 93304 when the congenital study is limited or performed as follow-up.
- 93306Echocardiogram (TTE)Complete, with spectral and color Doppler
- 93306 is the complete standard transthoracic study with Doppler. This code identifies a complete transthoracic evaluation focused on congenital cardiac abnormalities.
- 93307Transthoracic echoComplete, without Doppler
- 93307 describes a complete standard transthoracic study without Doppler. This code is the congenital-specific complete study.
- 93312Transesophageal echoComplete service
- 93312 uses a transesophageal probe, rather than imaging through the chest wall. Select the approach that matches the examination actually performed.
93303 billing questions
When should this code be used instead of 93306?
Use this code for a complete transthoracic study evaluating congenital cardiac abnormalities. Code 93306 describes a complete standard transthoracic study with Doppler and is not the congenital-specific choice.
How does this differ from 93304?
This code represents a complete congenital transthoracic examination. Code 93304 is for a limited or follow-up congenital study.
Can the professional and technical services be billed separately?
Yes. Modifier 26 identifies the professional interpretation, and modifier TC identifies the technical service. Without either modifier, the claim represents the global service.
Which part is subject to the cardiovascular diagnostic multiple procedure reduction?
The technical component is subject to the reduction. CMS applies the reduction to the technical component.
What documentation supports reporting the complete study?
Document the congenital cardiac indication, the complete transthoracic examination performed, and the interpreting clinician’s findings. A limited follow-up examination should be distinguished from a complete study.
Can Doppler services be reported with this study?
Codes 93320 and 93325 describe spectral Doppler and color-flow mapping services that may accompany congenital echocardiography when performed and separately documented.
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
Show the CMS file lines behind this rate
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