Glossary · Coding

Modifier 26 (professional component)

Modifier 26 designates the professional component (PC) of a diagnostic service—the physician's interpretation and written report—when billed separately from the technical component. Append it to a procedure code when the interpreting physician did not own or operate the equipment used to perform the test.

Verified May 8, 2026 · 8 sources ↓

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Definition

Source · Editorial summary grounded in 8 cited references ↓

When a single CPT code covers both a technical component (TC) and a professional component (PC), the two portions can be billed separately if different entities provide them. Modifier 26 identifies the PC: the physician's cognitive work of reviewing images or data, exercising medical judgment, and producing a distinct, signed written report. It does not cover equipment, supplies, technician time, or facility overhead—those belong to the TC, billed with modifier TC by the facility or equipment owner.

In orthopedic practice, the clearest trigger is hospital-based imaging. When a patient receives a CT scan or MRI at a hospital and an outside radiologist or orthopedic surgeon interprets the study, the hospital bills CPT + TC and the interpreting physician bills CPT + 26. If the same physician both performs and interprets the study using equipment the practice owns, no modifier is appended—that is the global (combined) service. CMS identifies eligible codes by a PC/TC indicator in the National Physician Fee Schedule Relative Value File; only codes with an indicator of 1 or 6 may be split. The modifier must appear in the first modifier field on the claim.

Modifier 26 is appropriate across radiology, pathology, and certain medicine services. It is never appropriate on evaluation and management (E/M) codes, anesthesia codes, codes whose descriptors already specify interpretation only (e.g., CPT 93010), or global-test-only codes (e.g., CPT 93000). It also cannot be used to re-bill an interpretation already rendered by another physician.

Why it matters

Incorrect use of modifier 26 is a direct revenue and compliance risk. Appending it to a global service—where the practice owns the equipment and employs the technologist—results in underpayment because the payer reimburses only the PC rate instead of the full global rate. Conversely, billing globally when the equipment belongs to the facility double-counts the TC, triggering overpayment recovery and potential False Claims Act exposure on audit. CMS and commercial payers use PC/TC indicator logic and place-of-service edits to flag mismatches automatically; denials and post-payment audits follow predictably when the modifier is misapplied.

Common mistakes

Where people most often go wrong with this concept.

Source · Editorial brief grounded in cited references ↓

Appending modifier 26 to E/M codes (e.g., 99213) — these have no technical component and the modifier is invalid.
Using modifier 26 on professional-component-only codes such as CPT 93010; the code descriptor already limits payment to the PC, so the modifier is redundant and will cause a claim edit.
Billing globally (no modifier) for hospital-owned imaging that the physician only interpreted, omitting modifier 26 and thereby triggering a duplicate-payment or enrollment mismatch denial.
Placing modifier 26 in the second modifier field instead of the first, which can cause payer editing failures.
Appending modifier 26 to re-read interpretations — billing for a second physician's review of a study already interpreted by another physician is not separately reimbursable under this modifier.
Assuming modifier 26 is always appropriate for any imaging code without verifying the PC/TC indicator (value 1 or 6) in the CMS National Physician Fee Schedule Relative Value File.
Using modifier 26 in an office place-of-service (POS 11) when the equipment is hospital-owned; several payers, including some Blue Cross plans, restrict modifier 26 to facility-based POS codes (19, 21, 22, 23).

Related codes

Codes commonly involved when this concept appears in practice.

CPT

Modifiers

52 Reduced services 59 Distinct procedural service 24 Unrelated E/M during postop

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 8 cited references ↓

01Can an orthopedic surgeon use modifier 26 when interpreting an MRI ordered at a hospital?

Yes, provided the surgeon produces a separate, signed written report of the findings and the hospital is billing the technical component separately. The surgeon appends modifier 26 to the appropriate imaging CPT code and bills under a facility-based place of service (POS 21, 22, or 23 depending on the setting).

02What happens if the orthopedic practice owns the X-ray equipment and the surgeon both takes and reads the film?

Bill the procedure code with no modifier — that is the global service. Adding modifier 26 in this scenario would reduce reimbursement to the PC rate only and underpay the practice for the equipment and supply costs already incurred.

03Is a written report required to bill modifier 26?

Yes. CMS policy is explicit: if the interpreting physician does not produce a separate written report documenting the clinical findings, billing for the professional component is not supported. A verbal communication or phone call to the ordering provider does not satisfy this requirement.

04Can modifier 26 and modifier TC be billed together on the same claim line?

No. They represent mutually exclusive components of a service. Billing both on the same line is equivalent to claiming the global fee twice under different modifier labels and will be rejected or flagged for overpayment recovery.

05How do I know which CPT codes are eligible for modifier 26?

Check the PC/TC Indicator column in the CMS National Physician Fee Schedule Relative Value File. Codes with an indicator of 1 (diagnostic tests with both PC and TC) or 6 (clinical laboratory tests with separately billable interpretation) are eligible. Codes with any other indicator are not.

06Can modifier 26 be used when a second physician re-reads a study already interpreted by a colleague?

No. Payers, including Medicare, do not separately reimburse a re-read of an interpretation already provided by another physician under modifier 26. The re-read is not a separately billable professional component service.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

Mira's documentation layer flags modifier 26 eligibility at charge capture when the place of service is a hospital-based setting (POS 21, 22, 23, or 19) and the interpreting provider is distinct from the facility performing the study. When Mira detects that the practice owns the imaging equipment (in-office X-ray, in-office ultrasound), it defaults to global billing and suppresses the modifier 26 suggestion to prevent underpayment. For studies ordered but not performed by the billing physician, Mira prompts the provider to confirm that a separate, signed, written interpretation report exists before appending modifier 26—because CMS requires a distinct written report for the PC claim to be valid. Mira also cross-checks the PC/TC indicator in the current NPFS Relative Value File; if a code carries indicator 2 (professional-component only) or indicator 3 (technical-component only), Mira blocks the modifier 26 append and alerts the coder. Modifier 26 is always placed in the first modifier field in Mira-generated claims. No action is taken on E/M or anesthesia codes.

See Mira's approach

Related terms

Modifier 52 (reduced services) Coding

Modifier 52 signals that a procedure was intentionally performed in a reduced form—completed but not to the full extent the CPT code describes—and triggers a corresponding reduction in reimbursement, typically 50% of the applicable fee schedule.

Modifier 59 (distinct procedural service) Coding

Modifier 59 signals that a procedure is distinct and independent from another non-E/M service billed on the same date—used specifically to override applicable NCCI Procedure-to-Procedure (PTP) edits when documentation supports a separate session, site, incision, lesion, or injury.