Last Updated on October 14, 2026
CPT 93306 describes a complete transthoracic echocardiogram (TTE) performed using two-dimensional imaging, including M-mode when performed, with spectral Doppler and color flow Doppler. The code covers a complete assessment of cardiac structures and blood flow. Because both Doppler components are included, CPT 93320 and 93325 should not be separately reported with 93306 for the same examination.
Accurate CPT 93306 billing depends on distinguishing complete and limited echocardiograms, documenting the required cardiac structures, and applying appropriate professional or technical component modifiers. Incorrect code selection, unsupported Doppler add-ons, and incomplete documentation can lead to claim denials, payment delays, and avoidable rework.
Table of contents
- CPT 93306 2026 Billing Compliance Updates
- What CPT 93306 Really Is
- What CPT 93306 includes and excludes
- CPT 93306 vs 93307 vs 93308 how to choose
- Common CPT 93306 mistakes and the correct approach
- Add ons with CPT 93306
- Modifiers for CPT 93306 That Prevent Edits
- Documentation for CPT 93306 That Payers Expect
- NCCI and MUE sanity for echo
- CPT 93306 vs 93307 vs 93308 in Practice: Five Fast Checks
- Accurate Echo Coding Demands Consistent Processes
- FAQs
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Schedule a MeetingCPT 93306 2026 Billing Compliance Updates
Accurate CPT 93306 reporting depends on documenting the scope of the echocardiogram, confirming spectral and color flow Doppler services, and applying appropriate billing modifiers. Coding teams should also verify medical necessity, payer coverage requirements, and current coding edits before submitting claims.
Documentation Requirements
- Document the cardiac structures examined and any technical limitations.
- Identify Doppler types performed (spectral + color flow).
- Clarify whether the study was complete vs. limited.
- Incomplete visualization does not automatically require reporting CPT 93308. The code must reflect the documented examination scope.
Medicare Conversion Factor
- $33.57 for qualifying APM participants.
- $33.40 for non‑qualifying participants.
- Represents a +3.5% increase vs. 2025.
NCCI Bundling Edits
- Echo and Doppler services are subject to applicable NCCI bundling rules.
- Improper unbundling is a potential audit trigger.
LCD Medical Necessity Updates
Medical necessity requirements vary by Medicare Administrative Contractor and payer. Heart failure, valvular disease, pre-operative evaluation, and oncology-related cardiac assessment may support echocardiography when applicable coverage criteria are met.
Modifier Scrutiny
Payers review modifier 26 (professional) and TC (technical) to determine whether billing reflects the services furnished.
Incorrect modifier use in hospital outpatient settings can result in denials or payment discrepancies.
CPT 93306 compliance hinges on detailed documentation, payer-specific coding accuracy, and modifier discipline. Practices should implement structured echo reporting templates and quarterly self-audits to stay ahead of payer reviews.
What CPT 93306 Really Is
CPT 93306 reports complete transthoracic echocardiogram with 2D imaging plus spectral Doppler and color flow Doppler in a single code. Includes M-mode if performed. Documentation should support assessment of the relevant cardiac structures, including left/right atria, left/right ventricles, aortic/mitral/tricuspid valves, aorta, and pericardium.
Any structures that could not be adequately visualized should be identified with the applicable technical limitations.If both Dopplers performed and interpreted, do not append separate Doppler add-ons 93320/93325. For cardiology-specific workflows, explore our cardiology billing services.
What CPT 93306 includes and excludes
Includes with 93306
- Complete transthoracic echo with 2D imaging (M-mode if done) and spectral Doppler and color flow Doppler.
- Documentation of following Cardiac structures: Left/right atria, Left/right ventricles, Aortic, mitral, tricuspid valves, Aorta and Pericardium
Not this code
- 93307 when the complete TTE is without spectral or color Doppler; add 93320 and or 93325 only if those Dopplers were actually performed.
- 93308 when the study is limited or follow up; add 93321 and or 93325 only if limited Doppler or color was used.
- Studies with fewer than 9 cardiac structures documented (without explanation).
- Incomplete study due to poor visualization without documentation
93312 series for transesophageal echo, 93350 93351 for stress echo, 93303 93304 for congenital focus.
Quick win: Do not add 93320 or 93325 to “finish” a complete study reported with 93306 because both Dopplers are already included.
CPT 93306 vs 93307 vs 93308 how to choose
Use this during coding or QA to pressure-test your choice.
| CPT Code | Description | When to Report |
|---|---|---|
| 93306 |
Complete TTE with spectral and color flow Doppler
|
When the complete examination and both Doppler components are performed and documented
|
| 93307 |
Complete TTE without spectral or color Doppler
|
When a complete 2D examination is performed without Doppler; separately report eligible Doppler services only when supported
|
| 93308 |
Limited or follow-up TTE
|
When the examination is limited in scope; eligible limited Doppler or color flow services may be separately reported when performed and supported.
|
If the study is TEE or stress echo, move to those families immediately rather than forcing 93306.
Common CPT 93306 mistakes and the correct approach
Mistake – Add 93320 93325 to “complete” a 93306.
Fix – Do not append these to 93306. They pair with 93307 or 93308 only when Dopplers were performed, interpreted, and supported by applicable coding rules.
Mistake – Treat 93308 as a TEE code.
Fix – 93308 is limited to TTE. TEE lives in the 93312 family.
Mistake – Use 93352 contrast add-on with routine 93306.
Fix – +93352 is for stress echo in the physician office; hospitals use HCPCS C or Q contrast codes instead of +93352.
Mistake -Throw modifier 59 at Doppler.
Fix – There is nothing to “unbundle” from 93306; verify unusual pairs with the NCCI PTP resources instead.
Tip: Document the examination scope, Doppler components, and medical necessity explicitly to help prevent avoidable coding errors.
Add ons with CPT 93306
Belongs with 93306 when documented
- +93356 Myocardial strain imaging using speckle tracking, listed in addition to an echo code (e.g., 93306). Document quantification, not just images.
- 76376 76377 3D post-processing and rendering with physician interpretation (rare; requires true 3D reconstruction work).
Confirm the current CPT reporting instructions, documentation requirements, and payer-specific edit rules for 93356, 76376, and 76377 before publication.
Does not belong with 93306
- +93320 and +93325 Doppler add-ons (already included in 93306).
- +93352 contrast with routine TTE (use only with stress echo in the office; hospitals report contrast via HCPCS).
Modifiers for CPT 93306 That Prevent Edits
- 26 or TC: Split professional vs technical when components are billed separately (e.g., physician interpretation of a facility study).
- 76 or 77: True repeat echocardiograms on the same date with a new medical need (post-procedure change, clinical deterioration). Check Medically Unlikely Edits and payer policy first.
- 52: Rarely fits echo; if the study is inherently limited, you are usually in 93308 rather than reduced 93306.
- Avoid 59: For Doppler on 93306, use the NCCI PTP files or your MAC lookup to validate any unusual code pairings.
- One wrong modifier can mean a denied claim or payment reduction, especially in global billing or split/shared services.
Documentation Tip: Modifier 26/TC requires appropriate documentation supporting the professional or technical component being billed.
Billing Global vs Split for CPT 93306
Global (no modifier): Same billing entity reports the professional and technical components when permitted under the applicable billing arrangement.
Split billing:
93306-26 → Professional only (interpretation)
93306-TC → Technical only (equipment/facility)
Documentation for CPT 93306 That Payers Expect
- Indication: In policy language (heart failure evaluation, valvular disease, pre-op risk, oncology baseline).
- Study type: Stated plainly: complete vs limited, transthoracic vs transesophageal.
- Doppler performed and interpreted: Spectral and color Doppler for 93306.
- Key measurements and findings: Chambers, valves, gradients, function, pericardium.
- Technical limitations: Document any cardiac structures that could not be adequately evaluated.
CMS articles that complement local LCDs for TTE explicitly point you back to NCCI and OPPS packaging, use these resources as part of your audit review.
Need a system for clean notes every time? Put our compliance program to work for your echo lab.
NCCI and MUE sanity for echo
Before pairing echo families or stacking add-ons, check the NCCI PTP edit tables and your MAC’s lookup tools to confirm whether a modifier can bypass an edit. For TTE services, CMS also flags that echo and Doppler services are subject to OPPS packaging and edit logic, so teach your team the workflow rather than hard-coding old numbers.
If repeat edits or denials keep bouncing back, route the batch to denials management for root-cause fixes
2026 NCCI Verification Checks:
- Verify applicable echo and Doppler bundling edits.
- Confirm professional and technical component reporting requirements.
- Review current MUE limits for applicable codes.
- Check same-day echo and stress echocardiography edits before billing.
CPT 93306 vs 93307 vs 93308 in Practice: Five Fast Checks
- Both Dopplers present: If yes, and the study is complete, 93306. If no, see 93307 or 93308 with only the add-ons actually performed and separately reportable.
- Complete versus limited: If the report supports a focused or limited examination, evaluate 93308.
- Family fit: TEE 93312 series, stress echo 93350/93351, congenital 93303/93304.
- Add-on drift check: If you added 93320/93325 to 93306, back up. Those Dopplers are included.
- Repeat the same day: If clinically necessary, document the reason and apply 76 or 77 when appropriate; verify MUEs before billing.
These five checks help identify common CPT 93306 coding errors before claim submission.
Accurate Echo Coding Demands Consistent Processes
Successful CPT 93306 billing requires more than selecting the right code. A thorough comprehension and appropriate utilization of CPT codes are indispensable for ensuring precision billing in cardiology. Reimbursement depends on complete documentation, correct Doppler reporting, proper modifier use, NCCI compliance, and payer‑specific rules.
Echo denials can stem from preventable mistakes, including misreporting Doppler add-ons with 93306, coding a limited exam as complete, or missing medical necessity documentation.
Before submitting a claim, verify:
- The study was complete vs. limited.
- Spectral and color Doppler were performed and documented.
- The correct echocardiography code family was selected.
- Add-on services are appropriately supported.
- Modifier and MUE requirements are met.
AnnexMed partners with cardiology practices to standardize echo workflows, reduce preventable denials, and improve reimbursement accuracy across cardiovascular diagnostics.
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Talk to our Billing ExpertsFAQs
Yes. CPT 93306 includes both spectral Doppler and color flow Doppler and should not be billed with 93320 or 93325. Both Doppler components are bundled into CPT 93306 when performed and interpreted during a complete TTE.
Documentation should support a complete transthoracic echocardiogram including chamber assessment, valve evaluation, Doppler findings, measurements, physician interpretation, and medical necessity.
Yes. CPT 93356 may be reported with 93306 when myocardial strain imaging is performed, quantified, and interpreted.The strain analysis must include documented measurements and clinical interpretation, not just image acquisition.
Modifier 26 is used when only the professional component (physician interpretation) is billed.Use modifier TC when billing only the technical component of the echocardiogram.
CPT 93306 reports a resting transthoracic echocardiogram. Stress echocardiography services are reported using CPT 93350 or 93351. Stress echo codes involve imaging performed during cardiac stress testing and follow separate coding rules.
