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CO-D7 Denial Code (Deactivated): Last Physician Visit Date

CO-D7 meant the claim lacked the date of the patient's most recent physician visit. X12 deactivated it and directs payers to CARC 16 with remark codes as needed.

X12 deactivated CARCD7 on October 16, 2003. Payers should no longer use it on new remittances, but it can still appear on older ERAs, corrected claims, and appeals.

Quick facts

Code
CO-D7 (CARC D7)
Status
Deactivated StoppedOctober 16, 2003 (in use since January 1, 1995).
Code set
Claim Adjustment Reason Codes (CARC)
Group codes
  • CO (Contractual Obligation): The provider needed to add the missing date; it was not a patient balance.
Official description
Claim/service denied. Claim lacks date of patient's most recent physician visit.
X12 Claim Adjustment Reason Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What CO-D7 meant

Some payers cover certain services only if a physician has seen the patient within a recent period. To check that, they need the date of the most recent physician visit on the claim. CARC D7 told the provider the date was missing, so the claim could not be approved.

What replaced it

X12 says to use code 16 with remark codes. On current remittances the denial is CO-16 together with a remark identifying the missing date. The remark code X12 used for the last physician visit date has itself since been retired, so payers can use N324, which flags a missing or invalid last seen or visit date, or CO-252 if they want records.

If you still see CO-D7

It appears only in historical claims. If a current claim is denied for a missing visit date, look up the patient’s last visit with the physician responsible for the care, confirm it falls within the payer’s required window, and add it to the claim in the correct field before resubmitting. If the visit was too long ago, a new physician visit may be needed before future services are covered.

  • CO-16 (Claim/service lacks information or has submission/billing error(s).): Named replacement: claim lacks information, used with a remark code.
  • N324 (Missing/incomplete/invalid last seen/visit date.): Remark code for a missing, incomplete, or invalid last seen or visit date.
  • CO-252 (An attachment/other documentation is required to adjudicate this claim/service.): An attachment or other documentation is required to adjudicate the claim.

CO-D7 FAQ

Which claims needed the last physician visit date?

Services that depend on ongoing physician involvement. Examples have included certain podiatry, therapy, and supply claims where coverage requires the patient to have been seen recently.

Where is the date reported?

Claim formats have a field for the last seen date. Check the payer's companion guide for when it is required and how to report it.