CARC 198: Precertification/notification/authorization/pre-treatment exceeded.
Prior auth was obtained but the service exceeded what was approved (more units, longer stay, different code).
CARC 198 is the code your insurance company used to explain why your claim was reduced, denied, or paid less than expected. It appears on your Explanation of Benefits (EOB) — the statement your plan sends after a claim is processed. Here's what it means for you and what you can do about it.
What CARC 198 means
The official X12 description is: “Precertification/notification/authorization/pre-treatment exceeded.”
In plain language: Prior auth was obtained but the service exceeded what was approved (more units, longer stay, different code).
Common scenarios
- Inpatient stay extended beyond approved days
- Surgery extended beyond approved procedure
- PT sessions exceeded approved count
What to do next 198
Appeal the exceeded portion with clinical justification. Often resolved by submitting the chart documentation showing why the additional service was needed (e.g., complications, intra-operative findings).
DenialHelp helps organize a source-linked draft from the denial notice and confirmed case facts. The patient and treating clinician must verify the governing review rule, current payer policy, clinical sources, attachments, destination, and deadline.
CARC 198 group codes explained
On the 835 ERA, CARC 198 appears alongside a group code that signals who is financially responsible for the adjustment. CO (Contractual Obligation) — Contractual write-off. The provider agreed to the rate. Patient does NOT owe this amount.
Frequently asked questions
What does CARC 198 mean?
Precertification/notification/authorization/pre-treatment exceeded. In plain language: Prior auth was obtained but the service exceeded what was approved (more units, longer stay, different code).
Is CARC 198 appealable?
Yes — CARC 198 is one of the codes that commonly supports an appeal. Appeal the exceeded portion with clinical justification. Often resolved by submitting the chart documentation showing why the additional service was needed (e.g., complications, intra-operative findings).
Which group code does CARC 198 appear under?
CARC 198 most often appears under: CO (Contractual Obligation) — Contractual write-off. The provider agreed to the rate. Patient does NOT owe this amount.
When does CARC 198 typically appear on a denial?
Common scenarios: Inpatient stay extended beyond approved days; Surgery extended beyond approved procedure; PT sessions exceeded approved count.
How do I appeal a CARC 198 denial?
Appeal the exceeded portion with clinical justification. Often resolved by submitting the chart documentation showing why the additional service was needed (e.g., complications, intra-operative findings).
Related resources
Sources
Appeal a CARC 198 denial
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