By Medgeene Solutions ·

A denial that reads CO-197, "authorization absent," feels like a billing problem. Usually it started days earlier, at the scheduling desk, and the billing team only meets it at the end.

Four places an authorization goes missing

  1. Nobody asked. The payer's requirements changed, or the scheduler didn't know the service needed one.
  2. It was approved for something slightly different. The approved code, provider, location, or date range doesn't match what was performed.
  3. It expired or ran out of units. A multi-visit authorization lapses before the last visit.
  4. The number never reached the claim. It lives in an email or a note instead of the visit record.

An approval isn't a promise of payment

An authorization says the payer agrees the service may be covered. It doesn't guarantee payment, and it only applies to what was actually approved. That's why the match between the authorization and the final charge matters as much as getting the authorization in the first place.

What helps

  • Check requirements at scheduling, by payer and by service, not at check-in.
  • Record the authorization number, valid dates, provider, location, and units in the visit itself.
  • Compare the charge you're about to enter with what was approved, before the claim goes out.
  • Watch expiration dates on multi-visit plans.
  • When a denial still happens, read the code, check the payer's appeal window, and decide quickly. Some payers allow retroactive requests in limited cases; many don't.

A quick example

A patient is scheduled for an imaging study. The scheduler confirms the authorization, but it was approved for one imaging code and the final study was billed under a different one. The visit goes fine, the claim doesn't. Comparing the approval with the charge before the claim leaves would have caught it in a minute.

Who should catch it

Whoever it is, it has to be on purpose. If everyone assumes someone else checked, the denial is the first time anyone looks. Billing can help by flagging patterns: which payer, which service, which provider. Those patterns show where the front-end process has a hole. This article is general information; requirements vary by payer and plan.

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