CPT Modifier 26
Professional Component
Source: AMA CPT / CMS HCPCS Level II definitions. Maintained by the D3rx Clinical Billing Team.
What modifier 26 means
Modifier 26 identifies the physician's professional component — the interpretation and written report — of a diagnostic test that has both a professional and a technical component. It is used when the provider interprets a study but does not own the equipment used to perform it.
When to use it
A physician interprets a diagnostic study performed on equipment owned by a facility — for example, reading a CT scan or an echocardiogram acquired at a hospital.
Documentation checklist
The record should support every item below before you append modifier 26.
- A separate, signed interpretation and report
- That the code has a professional/technical split (PC/TC indicator 1)
- That the interpreting provider did not furnish the technical component
Do NOT use modifier 26 when
- The code is professional-only or global-only (no PC/TC split — indicator 0/2/3/4)
- You own both components — bill the code globally with no modifier
- Only the technical resources were furnished — use modifier TC
Common denial reasons
- Appended to a code that has no PC/TC split
- Both the global code and the 26 component billed (double-billing)
- A duplicate interpretation was already billed by another provider
How to appeal a modifier 26 denial
Confirm the code carries PC/TC indicator 1, then submit the signed interpretation and report demonstrating the professional work. If denied as duplicate, show your interpretation is distinct from any technical-only or global billing by the facility.
Payer notes
Only codes with a PC/TC indicator of 1 split into 26 and TC. The 26 component reimburses the interpretation; the facility bills TC for equipment and technical resources.
Related & commonly confused modifiers
Where modifier 26 is used
- Radiology (70450, 73721, 93306)
- Cardiology diagnostics
- Pathology with a professional component
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Medical billing disclaimer
Modifier definitions follow standard AMA CPT and CMS HCPCS Level II guidance and are for educational reference. Payer policies, billing formats, and coverage rules vary and change. Always verify the current rule with the specific payer before submitting. D3rx is not responsible for claim outcomes.