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CO-134 Denial Code: Technical Fees Removed

CO-134 means the payer removed technical fees from the charges. The technical component of the service, such as equipment, staff, and supplies, is not payable to you on this claim, usually because another entity like the hospital must bill it or because only the professional component is payable.

Quick facts

Code
CO-134 (CARC 134)
Status
Active In use since October 31, 1998.
Code set
Claim Adjustment Reason Codes (CARC)
Group codes
  • CO (Contractual Obligation): The removed technical charges are not payable to the billing provider on this claim and are not the patient's responsibility.
Official description
Technical fees removed from charges.
X12 Claim Adjustment Reason Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What CO-134 means

CARC 134 reads technical fees removed from charges. Many diagnostic services have two parts: a technical component (the equipment, technologist, and supplies) and a professional component (the physician’s interpretation). When you bill the global service, the payer may decide you are entitled to only one part. CARC 134 reports the technical portion it removed.

The most common reason is setting. When a patient is a hospital inpatient, and often a hospital outpatient, the facility bills the technical component. A physician billing a global service in that setting will see the technical fees removed.

Example: a cardiologist bills a global diagnostic test for a patient who was a hospital inpatient. The payer pays the interpretation and reports the technical portion as CO-134 with remark M96. The hospital bills the technical side on its own claim.

Common causes

  • A global service billed for a hospital inpatient or outpatient, where the facility bills the technical component.
  • Missing modifier 26 on a professional-only interpretation.
  • The wrong place of service in box 24B, making a facility service look like an office service or the reverse.
  • Technical services performed under arrangement with a facility that already billed them.
  • An independent diagnostic testing facility or practice billing the technical part without being enrolled or equipped for it.

How to fix it

  1. Confirm where the service was performed and who owns the equipment and employs the staff.
  2. If the facility performed the technical part, submit a corrected claim (resubmission code 7 in box 22) for the professional component only, with modifier 26 in box 24D and the right place of service.
  3. If you performed the technical part in your office with your equipment, check the place of service and appeal with documentation of the setting.
  4. Post the removed amount as a charge reclassification. Do not bill the patient.
  5. Coordinate with the facility to make sure the technical component is billed once.

How to prevent it

  • Build rules that add modifier 26 automatically for interpretations of tests performed in hospital settings.
  • Verify patient status (inpatient, outpatient, or office) before coding diagnostic services.
  • Check place of service codes against where the service happened.
  • Use a Claims Validator to flag global billing in facility places of service.

Specialty notes

Radiology, cardiology, neurology, and pathology groups see this most, because their tests split cleanly into technical and professional components.

Remark codes that may appear with CO-134

  • M96 (The technical component of a service furnished to an inpatient may only be billed by that inpatient facility.): For inpatients, the technical component may only be billed by the inpatient facility; bill the professional component only.
  • CO-89 (Professional fees removed from charges.): The mirror code: professional fees removed from a facility claim.
  • CO-4 (The procedure code is inconsistent with the modifier used.): Procedure code inconsistent with the modifier, which can arise when 26 or TC is wrong.
  • CO-5 (The procedure code/type of bill is inconsistent with the place of service.): Procedure code inconsistent with the place of service.
  • CO-97 (The benefit for this service is included in the payment/allowance for another service/procedure that has already been adjudicated.): Payment included in another service's allowance.

CO-134 FAQ

What is the difference between the technical and professional components?

The technical component covers equipment, staff, and supplies used to perform a test. The professional component covers the physician's interpretation and report. Modifier TC identifies the technical portion and modifier 26 the professional portion.

Why was the technical fee removed?

Most often because the patient was a hospital inpatient or outpatient and the facility is responsible for billing the technical component. The physician may bill only the professional part.

How do I fix CO-134?

If the facility performed the test, rebill only the professional component with modifier 26. If you performed and own the equipment in a non-facility setting, appeal with proof.