Specialty billing
Cardiology Billing Services
Cardiology claims often involve diagnostic tests with separate professional and technical components, advanced imaging that needs prior authorization, and device monitoring with frequency rules.
Rules to watch
- Modifier 26 / TC by place of service
- Authorization tracking for imaging
- NCCI bundling for cath lab procedures
- Coverage determinations (LCDs/NCDs)
- Global surgical periods for interventional procedures
What should practices know about cardiology billing?
Cardiology billing is mostly about splitting work correctly. Many cardiac tests have a professional component, the physician’s interpretation, and a technical component, the equipment and staff. Who bills which part depends on where the test was done and who owns the machine. Get the modifier wrong and the claim is denied, or paid to the wrong party. Advanced imaging often needs prior authorization, and device patients bring remote monitoring codes with their own time periods. Common denial reasons include a missing 26 or TC modifier, an authorization that did not cover the exact test performed, and a diagnosis code that does not support medical necessity.
What makes it different
What makes cardiology billing different
Codes at a glance
Common cardiology codes and what to watch
| Service | Codes | What to watch |
|---|---|---|
| Electrocardiogram | 93000 (global), 93010 (interpretation only) | Bill only the part you performed |
| Echocardiogram | 93306 (complete TTE with Doppler and color) | Diagnosis must support necessity; check authorization |
| Stress test | 93015 (global), 93016–93018 (components) | Split components when work is shared |
| Holter monitor | 93224 (up to 48 hours) | Recording and interpretation included in the code |
| Split billing | Modifier 26 (professional), TC (technical) | Depends on place of service and equipment ownership |
Related services
Services that matter most for cardiology
FAQ
Cardiology billing questions
What do modifiers 26 and TC mean?
Modifier 26 reports only the professional component (the interpretation). Modifier TC reports only the technical component (the equipment, staff and supplies). A global service with neither modifier covers both.
Why are cardiac imaging claims denied?
Common reasons include missing prior authorization and diagnosis codes that do not meet the payer’s medical-necessity policy for the test.
Coding rules change every year. The code references on this page reflect general guidance at the time of writing. Payer policies and your documentation always determine what is billable.
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