CPT 93306: Transthoracic Echo With Doppler, Complete
CPT 93306 reports a complete transthoracic echocardiogram with 2D and M-mode imaging, plus spectral Doppler AND color flow Doppler. It is the standard full heart ultrasound for cardiac function and valve assessment. In 2026 Medicare pays about $196.73 for the global service, split into a professional (modifier 26) and technical (modifier TC) component.
- Code type
- Transthoracic echo, complete, w/ spectral + color Doppler
- 2026 Medicare (global)
- $196.73
- Components
- Professional (26) + Technical (TC); PC/TC indicator 1
- Global period
- XXX (concept does not apply)
What is CPT 93306 used for?
CPT 93306 reports a complete transthoracic echocardiogram (TTE) with 2D and M-mode imaging, spectral Doppler, and color flow Doppler. It is the standard full heart ultrasound ordered for heart failure, murmur, valve disease, chest pain, arrhythmia, and cardiomyopathy. To bill 93306, the report must document all three modalities: 2D with M-mode, spectral Doppler, and color flow Doppler.
If Doppler is not performed, the complete-without-Doppler code is 93307. A follow-up or limited study is 93308. Choosing 93306 requires the full complete-plus-Doppler documentation to be present.
How much does 93306 pay in 2026, and how does the 26/TC split work?
The 2026 national Medicare allowed amount for the global study is about $196.73. With a PC/TC indicator of 1, the global fee divides into professional and technical components:
| Component | Modifier | Covers | Approx. 2026 |
|---|---|---|---|
| Professional | 26 | Cardiologist interpretation and report | ~$52 |
| Technical | TC | Ultrasound equipment, sonographer, overhead | ~$145 |
| Global | (none) | Both, same entity | ~$196.73 |
The two components always sum to the global figure. Confirm your locality amount with the Medicare fee calculator.
Complete versus limited, and who bills each component
Example: a hospital outpatient echo lab performs a complete TTE with Doppler; a cardiologist reads it later. The hospital bills the technical resources through OPPS, and the cardiologist bills 93306-26 for about $52. A cardiology office that owns the machine and interprets its own studies bills the $196.73 global.
- Confirm the report documents 2D/M-mode, spectral Doppler, AND color Doppler before choosing 93306.
- In a hospital place of service, the physician appends modifier 26; the facility captures the technical side.
- Do not add 93320 or 93325 — the Doppler work is already bundled into 93306.
How does 93306 fit the echocardiography family?
Transthoracic echo codes are chosen by completeness and whether Doppler is included.
- 93306 — complete TTE with spectral and color Doppler.
- 93307 — complete TTE without Doppler.
- 93308 — follow-up or limited TTE.
The professional and technical split works the same across all three — see modifier 26 and modifier TC. For the routine electrocardiogram, which uses a code-based split instead of modifiers, see 93000.
Frequently asked questions
The 2026 national Medicare allowed amount for the global complete transthoracic echo with Doppler is about $196.73. That global fee is the sum of the professional component (interpretation, modifier 26) and the technical component (equipment and sonographer, modifier TC). Medicare pays 80 percent after the deductible; the patient or secondary owes 20 percent.
Append modifier 26 when a cardiologist interprets an echo acquired elsewhere — the professional component. Append modifier TC when your facility owns the equipment and the sonographer performs the study but an outside physician reads it. Bill 93306 global only when the same entity both performs and interprets the echocardiogram.
93306 is a COMPLETE transthoracic echo that must include 2D with M-mode, spectral Doppler, AND color flow Doppler, all documented. 93308 is a follow-up or LIMITED study. If Doppler is not performed, the complete code without Doppler is 93307. Do not report the color/spectral Doppler add-ons (93320/93325) separately with 93306 — they are bundled into it.
Sources & further reading
Reviewed by the ImmediCare Solutions RCM team
Certified billers and coders handling claims across 50+ specialties nationwide. This entry is reviewed against current payer policy and CMS rules. Last review: Jul 5, 2026.
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