CPT 93350 Billing: Stress Echocardiography

CPT 93350 is stress echocardiography: echo imaging at rest and with stress, interpreted and reported. The defining feature is what it leaves out. Unlike 93351, it does not include the continuous ECG monitoring and physician supervision, which is why the stress test codes stay separately reportable alongside it.

What CPT 93350 covers

93350 is echocardiography, transthoracic, real-time with image documentation (2D), including M-mode recording when performed, during rest and cardiovascular stress using treadmill, bicycle exercise and/or pharmacologically induced stress, with interpretation and report.

It covers the imaging side of a stress echo. The stress test itself, meaning the supervision, the continuous ECG tracing and its interpretation, is separate work reported with the 93015 family as appropriate to the setting.

93350 excludes ECG monitoring and supervision. 93351 includes them. Everything about how you pair these codes follows from that one distinction.

Reimbursement context

93350 splits into professional and technical components, and the setting determines which you may report. Payment follows the CMS Physician Fee Schedule and varies by locality.

Documentation requirements

The cardiac indication that justified a stress study rather than a resting echo.
Rest images and stress images, both retained and both addressed in the report.
Wall motion assessment at rest and at peak stress, segment by segment.
The stress method used, including agent and dose where pharmacological.
Heart rate achieved against target, and reason for termination.
Where contrast was used, the agent and the reason it was needed.
A signed interpretation with a conclusion answering the clinical question.

Common denials and the exact fix

Stress test components omitted when they were reportable

This is an under-reporting problem rather than a denial. Because 93350 excludes supervision and ECG monitoring, practices that treat it like 93351 leave the stress test component unbilled on every study.

Fix: where your practice supervised the test and interpreted the tracing, report the appropriate stress test component codes alongside 93350.

Resting echo billed on the same day

The rest imaging is already inside 93350.

Fix: report the stress echo alone unless a genuinely separate indication is documented for an additional study.

Missing or mismatched 26 / TC

A global code from a facility place of service denies where the facility bills the technical component.

Fix: align modifier, place of service and equipment ownership.

CO-50: indication does not justify a stress study

A stress echo ordered without a documented reason that a resting study would not answer draws a medical-necessity denial.

Fix: record the clinical question in the order and the report, and code it specifically.

Modifier rules

26 / TC: split by setting and equipment ownership.
51: not appended to add-on codes reported with the study.
76 / 77: repeat study with a documented clinical trigger.
59 / XE / XP / XS / XU: rarely applicable; not a route to separately billing imaging already inside the code.

NCCI bundling edits

93350 with 93015 to 93018: separately reportable, because 93350 excludes supervision and ECG monitoring.
93350 with 93306, 93307 or 93308: the rest imaging is included in the stress study.
93350 with 93351: mutually exclusive. One stress echo, one code.
93352: contrast use during the stress study is reported with this add-on where genuinely administered, and the agent itself is reported under its own HCPCS code.

Frequently asked questions

What is the difference between CPT 93350 and 93351?

93351 includes the performance of continuous electrocardiographic monitoring with physician supervision, while 93350 does not. That single difference decides everything downstream: with 93351 the stress test codes 93015 to 93018 are not separately reportable, whereas with 93350 the appropriate stress test component codes remain separately reportable.

Can I bill a resting echo on the same day as 93350?

Not routinely. 93350 already includes the rest imaging performed as part of the stress study. A separate complete echo on the same day needs documentation of a distinct clinical indication that the stress study did not address, and it draws scrutiny even then.

Is contrast separately reportable with stress echocardiography?

Yes. When an echocardiographic contrast agent is used during the stress study, the add-on code 93352 reports that use, with 93350 or 93351. Report it only where the agent was genuinely administered and documented, and note that the agent itself may be billed separately depending on the setting and payer.

Sources

American Medical Association, CPT 2026 Professional Edition.
Centers for Medicare & Medicaid Services, National Correct Coding Initiative Policy Manual and quarterly edit tables, cms.gov.
Centers for Medicare & Medicaid Services, Physician Fee Schedule Look-Up Tool, cms.gov.
American College of Cardiology, acc.org. AAPC coding resources, aapc.com.

CPT® is a registered trademark of the American Medical Association. Code descriptors are summarised here for billing guidance and are not a substitute for the current CPT codebook. Payer rules and NCCI edits change quarterly; verify against your own payer policy before submission.

Related codes

CPT 93351. Stress echo including ECG monitoring and supervision.
CPT 93306. Complete TTE with spectral and color flow Doppler.
CPT 93308. Limited or follow-up echo.

CPT 93350: Stress Echocardiography, Rest and Stress Imaging