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N653 Remark Code: Injury Date and Loss Date Don't Match

N653 means the date of injury on your bill is different from the date of loss the carrier has recorded for the claim. The carrier cannot confirm the bill belongs to that injury until the dates are reconciled.

Quick facts

Code
N653 (RARC N653)
Status
Active In use since July 15, 2013.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • CO (Contractual Obligation): The bill is held back from payment because of a data conflict the provider is expected to resolve. It is not a patient balance.
Official description
The date of injury does not match the reported date of loss.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N653 means

Injury claims are keyed on two things: the carrier’s claim number and the date the injury happened. When your bill reports an injury date that doesn’t line up with the carrier’s date of loss for that claim number, the carrier can’t be sure the treatment relates to the injury it accepted. N653 is the flag it uses for that mismatch.

Unlike N652, the service date here may be perfectly reasonable. The conflict is purely between the two injury dates.

N653 appears on workers’ compensation and property and casualty remittances, where the date of loss is central to coverage.

Typical causes

  • The front desk recorded the date the patient first came in, rather than the date the injury happened.
  • The patient gave an approximate date, and the employer or auto carrier recorded a different one.
  • A repetitive-strain or occupational disease claim, where the jurisdiction’s rules set a specific date of injury that differs from when symptoms started.
  • A patient with several injury claims had the wrong claim number attached.
  • A simple keying error in the month, day, or year.

How to fix it

  1. Call the adjuster to confirm the date of loss and claim number on file.
  2. Check your records, including intake forms and the first report of injury, to see which date is right.
  3. Correct your bill if your date was wrong and resubmit using the carrier’s corrected-bill process.
  4. Ask for the carrier’s record to be updated if its date is wrong, with supporting documents from the patient or employer, then request reprocessing.
  5. Re-attach the correct claim if the bill was filed under another injury’s claim number.

How to prevent it

Collect the date of injury, claim number, and adjuster contact at the first visit, and confirm them with the carrier before billing. Store them at the case level so every later bill uses the same verified values instead of retyped ones.

Codes that may appear with N653

  • CO-16 (Claim/service lacks information or has submission/billing error(s).): The claim has a billing error or missing information; N653 names the conflicting date.
  • OA-19 (This is a work-related injury/illness and thus the liability of the Worker's Compensation Carrier.): Used by some carriers when the date issue leaves the injury's work-relatedness unconfirmed.
  • N652 (The date of service is before the date of loss.): The date of service falls before the date of loss, a stronger conflict than a mismatch.
  • N625 (Missing/Incomplete/Invalid Workers' Compensation Claim Number.): The workers' compensation claim number is missing or invalid.
  • N622 (Not covered based on the date of injury/accident.): Coverage denied based on the date of injury or accident.

N653 FAQ

Where does the carrier get its date of loss?

From the first report of injury, the employer's report, or the auto accident claim. That record usually controls, so your bill needs to match it unless the record itself is wrong.

What if the patient says the carrier's date is wrong?

The patient or employer needs to have the carrier correct its claim record. Once the adjuster confirms the change, ask for your bill to be reprocessed.

Could the patient have two injuries?

Yes. Two injuries with separate dates usually mean two claim numbers. Make sure the bill uses the claim number and date that match the condition treated.