CO-75: Direct Medical Education Adjustment
Standard DGME contractual write-off. Post as an allowance. Challenge only if the PRA, FTE count, or Medicare day share is wrong.
What Does CO-75 Mean?
CO-75 is the standard DGME contractual adjustment for teaching hospitals under Medicare. It represents the difference between billed charges and the DGME pass-through payment allocated to the claim. This is a normal component of Medicare's teaching hospital payment methodology, not a denial.
CARC 75 represents the Direct Graduate Medical Education payment adjustment on remittances for teaching hospitals. Unlike the Indirect Medical Education adjustment (CARC 74) which is a percentage add-on to DRG payments, DGME is a separate aggregate payment calculated through a distinct formula based on three inputs: the hospital-specific per-resident amount (PRA), the number of full-time equivalent (FTE) residents in approved programs, and Medicare's share of total inpatient days.
The DGME payment compensates teaching hospitals for the direct costs of training residents — salaries, benefits, and allocated overhead for residency programs accredited by ACGME or ADA. Because DGME is calculated as an aggregate pass-through payment rather than a per-discharge add-on, the adjustment on any individual claim reflects the hospital's overall DGME allocation spread across its Medicare discharges.
CARC 75 is almost always paired with Group Code CO, making it a contractual write-off. The adjustment amount on each claim represents the gap between billed charges and the DGME-allocated payment. If the adjustment seems unexpectedly large or small, the issue typically traces to outdated FTE resident counts, an incorrect per-resident amount, or a shift in the Medicare share of inpatient days. Teaching hospitals should build DGME reconciliation into their revenue cycle workflow alongside CARC 74 (IME) and CARC 76 (DSH) to catch discrepancies across all three Medicare payment adjustments.
Common Causes
| Cause | Frequency |
|---|---|
| Standard DGME payment adjustment under Medicare Teaching hospitals receive a separate DGME payment from Medicare based on a per-resident amount, the number of FTE residents, and Medicare's share of total inpatient days. CARC 75 reflects this adjustment as part of the normal payment process | Most Common |
| Incorrect FTE resident count The hospital's reported full-time equivalent (FTE) resident count used in the DGME calculation was inaccurate, resulting in a different adjustment than expected | Common |
| Missing residency program accreditation documentation Required documentation supporting the residency program's ACGME or ADA accreditation status was not submitted, incomplete, or expired, affecting the DGME payment | Common |
| Per-resident amount calculation discrepancy The hospital-specific per-resident amount (PRA) used in the DGME formula was updated or adjusted, causing a different payment than the hospital anticipated | Common |
| Change in Medicare share of inpatient days The proportion of Medicare inpatient days relative to total inpatient days changed, altering the DGME payment calculation | Occasional |
How to Resolve
Reconcile the DGME adjustment against expected payment amounts by verifying the per-resident amount, FTE counts, and Medicare inpatient day share.
- Calculate expected DGME payment Multiply the per-resident amount by the FTE resident count by the Medicare share percentage. Compare this total annual amount against the per-claim allocation on the ERA.
- Verify FTE caps and resident counts Medicare caps FTE residents at the 1996 level for most hospitals. Confirm you are not exceeding the cap and that current program counts are correctly reported.
- Post the contractual adjustment If the calculation checks out, post CO-75 as a contractual write-off. Track it alongside CARC 74 and CARC 76 adjustments for complete Medicare payment reconciliation.
- Dispute with the MAC if incorrect If the PRA, FTE count, or Medicare day share is wrong, submit corrected data with supporting documentation from your cost report and request reprocessing.
Common RARC Pairings
The RARC code tells you exactly what triggered the CO-75:
| RARC | Description |
|---|---|
| N115 | Alert: This payment reflects the DGME adjustment applied to the claim for this teaching hospital. |
| N381 | Alert: Consult your contractual agreement for billing and payment information related to these charges. |
How to Prevent CO-75
- Keep FTE resident count data current and submit timely updates to CMS when residency programs add or lose positions
- Maintain up-to-date ACGME and ADA accreditation records for all programs included in the FTE count
- Monitor the per-resident amount and reconcile it against CMS cost report settlements annually
- Train finance and billing staff on the DGME formula so they can identify unexpected adjustments
- Conduct regular internal audits of GME cost report data to catch errors before cost report finalization
General Prevention
- Maintain accurate and current FTE resident count data and submit updates to CMS promptly when residency program sizes change
- Ensure all residency program accreditation documentation is current and filed with the MAC before annual cost report submissions
- Monitor the hospital-specific per-resident amount and reconcile it against CMS updates annually
- Train billing and finance staff on the DGME payment formula so they can identify discrepancies between expected and actual payments
- Conduct regular internal audits of GME cost report data to prevent errors in the DGME calculation inputs
Also Filed As
The same CARC 75 may appear with different Group Codes:
Related Denial Codes
Sources
- https://www.mdclarity.com/denial-code/75
- https://www.cms.gov/medicare/payment/prospective-payment-systems/acute-inpatient-pps/direct-graduate-medical-education-dgme
- https://ambci.org/medical-billing-and-coding-certification-blog/guide-to-claim-adjustment-reason-codes-carcs
- Codes maintained by X12. Visit x12.org for official definitions.