Modifier 26 (Professional Component) is a CPT/HCPCS modifier used to report only the physician’s professional portion of a diagnostic procedure or service when the technical component is provided and billed separately by another provider or facility.

Many diagnostic procedures are considered global services because they include two distinct components:

Professional Component (Modifier 26) – Physician supervision (when applicable), interpretation of the diagnostic study, medical judgment, and a signed written report.
Technical Component (Modifier TC) – Equipment, supplies, technicians, facilities, and performance of the diagnostic test.

When only the professional interpretation is provided, Modifier 26 is appended to the CPT® code. CMS requires Modifier 26 only for procedures that are eligible for professional/technical split billing based on the Medicare Physician Fee Schedule (MPFS) PC/TC Indicator.

Modifier

Modifier Name

Professional Component

Plain English Explanation

Modifier 26 tells the payer:

“Only the physician’s interpretation and professional services were provided. The technical portion of the procedure was performed and billed separately.”

Purpose of Modifier 26

Modifier 26 is used to:

Bill only the physician’s professional interpretation.
Separate physician services from equipment and facility expenses.
Prevent duplicate reimbursement for global services.
Support split billing when different entities provide the technical and professional portions.
Comply with Medicare Physician Fee Schedule billing requirements.

Understanding Modifier 26

The Professional Component includes:

Physician interpretation
Medical judgment
Image or test analysis
Supervision when applicable
Preparation of the final written report
Physician liability associated with interpretation

It does not include:

Equipment
Imaging machines
Laboratory analyzers
Supplies
Technologists
Facility expenses
Technical performance of the procedure

Common Services That Use Modifier 26

Modifier 26 is frequently used with:

Diagnostic X-rays
CT scans
MRI
Ultrasound
Nuclear medicine
Echocardiography
Electrocardiography (ECG/EKG)
Pulmonary function testing
Pathology interpretation
Diagnostic laboratory interpretation (when applicable)

These services generally have a PC/TC Indicator of “1” in the Medicare Physician Fee Schedule Database, meaning they may be billed globally or split into professional and technical components.

When to Use Modifier 26

Modifier 26 is appropriate when:

The physician provides only the interpretation and report.
Another provider or facility performs the technical portion.
The CPT® code allows PC/TC split billing.
A separate written interpretation is documented.
The payer recognizes Modifier 26.

Common Examples

✔ Hospital performs a chest X-ray; radiologist interprets the images.

✔ Imaging center performs an MRI; independent radiologist reads the study.

✔ Hospital performs an echocardiogram; cardiologist provides the interpretation only.

✔ Hospital laboratory prepares pathology slides; pathologist performs only the microscopic interpretation.

When NOT to Use Modifier 26

Do not use Modifier 26 when:

The same provider performs both the technical and professional components (bill the global service without Modifier 26).
The CPT® code is already professional-component-only (PC/TC Indicator = 2), such as 93010.
The CPT® code is technical-component-only (PC/TC Indicator = 3), such as 93005.
The CPT® code is designated as global-only.
Evaluation and Management (E/M) services are billed.

Appending Modifier 26 to professional-only codes or global services commonly results in claim denials.

Medicare Rules

Medicare requires:

Modifier 26 only for procedures eligible for professional/technical split billing.
The physician must prepare a separate signed written interpretation and report.
Modifier 26 identifies only the physician work RVUs and associated professional reimbursement.
If one provider performs both the technical and professional portions, bill the global CPT® code without modifiers.
Always verify the PC/TC Indicator in the Medicare Physician Fee Schedule Database before billing.

Commercial Insurance Rules

Most commercial insurers follow Medicare methodology.

Many payers:

Recognize Modifier 26.
Require a documented written interpretation.
Verify the CPT® code allows PC/TC split billing.
Require Modifier 26 in the first modifier position when applicable.
Audit duplicate global billing.

Always review payer-specific billing policies.

Documentation Requirements

Documentation should include:

Physician order.
Date of service.
CPT® code.
Diagnostic findings.
Independent physician interpretation.
Signed written report.
Medical necessity.
Provider signature.

A separate written interpretation is one of the most important documentation requirements for Modifier 26.

Real Billing Examples

Example 1 – Chest X-ray

A hospital performs a two-view chest X-ray.

An independent radiologist interprets the images and prepares the report.

Billing

Hospital:

71046-TC

Radiologist:

71046-26

Example 2 – CT Scan

An outpatient imaging center performs a CT abdomen.

An independent radiologist provides the interpretation.

Radiologist bills:

Appropriate CT CPT® code with Modifier 26.

Example 3 – Echocardiogram

A hospital performs a transthoracic echocardiogram.

A cardiologist reviews the images and issues a signed interpretation.

The cardiologist reports the appropriate CPT® code with Modifier 26.

Example 4 – Incorrect Use

A physician owns the imaging equipment, performs the diagnostic study, and interprets the results.

Billing:

72148-26

This is incorrect because the physician performed the global service. The CPT® code should generally be billed without Modifier 26.

CMS-1500 Claim Example

Field	Example
CPT Code	71046-26
Modifier	26
Diagnosis Pointer	Appropriate ICD-10-CM diagnosis
Units	1

Billing Example

Provider	CPT® Code
Hospital	71046-TC
Radiologist	71046-26

Common Denial Reasons

Modifier 26 appended to professional-only CPT® codes.
Billing both the global service and Modifier 26.
Missing signed interpretation.
CPT® code does not allow PC/TC split billing.
Duplicate billing by another provider.
Incorrect modifier placement.

How to Correct the Denial

Review the EOB or ERA.
Verify the CPT® code’s PC/TC Indicator.
Confirm only the professional interpretation was provided.
Ensure a signed written report exists.
Submit supporting documentation.
Appeal when documentation supports professional-component billing.

Coding Tips

Always verify the PC/TC Indicator before appending Modifier 26.
Do not use Modifier 26 with professional-component-only CPT® codes.
Bill the global CPT® code when the same provider performs both technical and professional services.
Maintain a complete signed interpretation.
Coordinate billing with the facility to avoid duplicate claims.

Modifier 26 vs Modifier TC

Modifier	Purpose
26	Professional component (physician interpretation and written report).
TC	Technical component (equipment, technicians, supplies, and facility).

Modifier 26 vs Global Service

Billing Type	Includes
Global Service	Professional + Technical Components
Modifier 26	Professional Component Only
Modifier TC	Technical Component Only

Frequently Asked Questions (FAQs)

Q1. What is Modifier 26?

Answer: Modifier 26 identifies the physician’s professional interpretation and written report when billed separately from the technical component.

Q2. What is included in the professional component?

Answer: The professional component includes physician interpretation, medical judgment, supervision (when applicable), and a signed written report. It does not include equipment or facility expenses.

Q3. Can Modifier 26 and Modifier TC be billed together?

Answer: Yes. When different providers perform the technical and professional portions, one bills the CPT® code with Modifier TC, while the interpreting physician bills the same CPT® code with Modifier 26. Together they represent the global service.

Q4. Can Modifier 26 be appended to CPT® 93010?

Answer: No. CPT® 93010 already represents the professional interpretation and report only. Appending Modifier 26 is unnecessary and generally results in a denial.

AR Caller Tips

When following up on a denied Modifier 26 claim:

Verify the CPT® code supports PC/TC split billing.
Confirm a signed interpretation and report are available.
Check whether another provider billed the global service.
Review the MPFS PC/TC Indicator.
Record the payer representative’s name, reference number, and appeal instructions.

Interview Questions

Question 1

What is Modifier 26?

Answer: Modifier 26 identifies the physician’s professional interpretation and report for an eligible diagnostic service when billed separately from the technical component.

Question 2

What is the difference between Modifier 26 and Modifier TC?

Answer: Modifier 26 covers the physician’s interpretation and report, while Modifier TC covers the equipment, supplies, personnel, and facility resources used to perform the test.

Question 3

When should Modifier 26 not be reported?

Answer: It should not be used when the provider performs the global service or when the CPT® code is already defined as professional-component-only.

Practice Scenario

Scenario

A hospital performs a CT scan of the chest using its imaging equipment. The images are sent electronically to an independent radiologist, who reviews the images and issues a signed written report.

Question

How should each provider bill?

Answer

Hospital: Bills the CT CPT® code with Modifier TC.
Radiologist: Bills the same CT CPT® code with Modifier 26.

This accurately separates the technical and professional components of the diagnostic service.

Related Modifiers

Modifier TC – Technical Component
Modifier 59 – Distinct Procedural Service
Modifier 76 – Repeat Procedure by Same Physician
Modifier 77 – Repeat Procedure by Another Physician

Common Billing Mistakes

Appending Modifier 26 to professional-only CPT® codes.
Billing the global service and Modifier 26 for the same provider.
Failing to prepare a signed written interpretation.
Ignoring the MPFS PC/TC Indicator.
Duplicate billing between physician and facility.

Key Takeaways

Modifier 26 identifies the professional component of eligible diagnostic services.
It covers physician interpretation, medical judgment, and the written report—but not equipment or facility costs.
Use Modifier 26 only with CPT®/HCPCS codes eligible for PC/TC split billing.
Always verify the PC/TC Indicator in the Medicare Physician Fee Schedule Database.
Proper documentation and a signed interpretation are essential to support reimbursement.

References

CMS Medicare Claims Processing Manual – Professional and Technical Components.
Noridian Medicare – Modifier 26 Guidance.
Asuris Reimbursement Policy – Modifier 26 & TC.
AMA CPT® Professional Edition (licensed codebook).

Conclusion

Modifier 26 is an essential modifier used to report the professional component of eligible diagnostic procedures. It allows physicians to bill separately for their interpretation and written report when another entity performs the technical portion of the service. Proper application requires understanding PC/TC indicators, maintaining complete documentation, and following Medicare and payer-specific billing requirements. Correct use of Modifier 26 supports compliant billing, accurate reimbursement, and fewer claim denials.

Educational Disclaimer

This article was prepared with the assistance of artificial intelligence (AI) for educational and informational purposes. It is based on publicly available CMS guidance, Medicare billing resources, and general medical billing principles. It is not an official publication of the American Medical Association (AMA), CMS, or any insurance payer. CPT® is a registered trademark of the American Medical Association. Always consult the latest AMA CPT® codebook, the CMS Medicare Physician Fee Schedule Database (MPFSDB), Medicare Administrative Contractor (MAC) guidance, National Correct Coding Initiative (NCCI) policies, and payer-specific billing policies before coding, billing, or submitting claims.