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CO-75 Denial Code: Direct Medical Education Adjustment

CARC 75 is a direct medical education adjustment. It reflects the portion of a teaching hospital's payment related to the direct costs of training residents, such as salaries and teaching costs, or its removal when a payer excludes it.

Quick facts

Code
CO-75 (CARC 75)
Status
Active In use since January 1, 1995.
Code set
Claim Adjustment Reason Codes (CARC)
Group codes
  • CO (Contractual Obligation): The usual group. The adjustment is part of how the payer calculates the facility's payment and isn't billed to the patient.
  • OA (Other Adjustment): Some payers report it under OA as an informational adjustment.
Official description
Direct Medical Education Adjustment.
X12 Claim Adjustment Reason Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What CARC 75 means

CARC 75 is the direct medical education adjustment. Teaching hospitals incur direct costs for running residency programs: resident stipends and benefits, supervising physician time, and administrative costs. Some payment methods account for those costs separately from the basic service payment. When a payer adds, removes, or itemizes that component on a claim, it can report it with CARC 75.

Medicare pays direct graduate medical education (DGME) mainly through the hospital’s cost report, not as a per-claim add-on. Some Medicaid programs and other payers include a medical education component in their rates or claims, and some Medicare Advantage or commercial contracts carve it out. That’s why CARC 75 shows up only on certain payers’ remittances.

This is a facility code. Professional claims don’t normally carry it.

Because direct education costs are usually settled at the hospital level, a claim-level CARC 75 is often a sign that the payer is deliberately separating that component from the service rate. Reviewers should confirm that the carve-out matches what the hospital agreed to, and that the same costs aren’t being removed twice, for example once on the claim and again in a settlement.

Common causes

  • Payer methodology that itemizes a direct medical education component on each claim.
  • Contract carve-outs removing medical education costs from rates.
  • Medicaid programs that pay graduate medical education through claims or supplemental payments.
  • Rate updates that change the education component.

How to check it

  1. Review the contract or payer methodology for how direct medical education is treated.
  2. Confirm the rates and factors the payer used for your facility.
  3. Compare the ERA amount with the expected component.
  4. Dispute mismatches with the payer, attaching your calculation and contract language.

How to prevent problems

  • Record medical education terms in each payer contract summary.
  • Coordinate with reimbursement and cost report staff so claim-level and cost report treatment match.
  • Watch CARC 75 separately from denials. An ERA Analyzer can isolate these adjustments for contract review.

Specialty notes

Academic medical centers and teaching hospitals are the only providers that normally encounter CARC 75. Community hospitals without residency programs rarely see it; if they do, the payer may have misapplied a methodology.

Remark codes that may appear with CO-75

  • N381 (Alert: Consult our contractual agreement for restrictions/billing/payment information related to these charges.): Points to the contract, which may say whether medical education costs are included in rates.
  • CO-74 (Indirect Medical Education Adjustment.): Indirect medical education adjustment, which covers the indirect costs of teaching.
  • CO-76 (Disproportionate Share Adjustment.): Disproportionate share adjustment.
  • CO-45 (Charge exceeds fee schedule/maximum allowable or contracted/legislated fee arrangement.): The standard contractual adjustment.
  • CO-70 (Cost outlier - Adjustment to compensate for additional costs.): Cost outlier adjustment on high-cost cases.

CO-75 FAQ

How is direct medical education different from IME?

Direct medical education (often called direct graduate medical education, or DGME) covers direct training costs such as resident salaries, supervising physician time, and program overhead. IME covers the higher patient care costs associated with being a teaching hospital.

How does Medicare pay direct medical education?

Medicare pays DGME largely through the hospital's cost report rather than per claim. Other payers may include, exclude, or itemize an education component in claim payments, depending on their methodology.

Should I dispute CO-75?

Only when the adjustment conflicts with your contract or the payer's published methodology.

Can I bill the patient for CO-75?

No. It's a payment methodology adjustment between the payer and the facility and has nothing to do with patient cost-sharing.