# CO 97 denial code on dental claims > What does denial code CO 97 mean on a dental claim, and can it be appealed? URL: https://dentovio.com/dental-claim-denial-codes/co-97 Last verified: 2026-08-29 Dentovio is an independent publisher — not a payer, the ADA, X12, or any government agency. Code meanings on this page are Dentovio's paraphrases of the X12 Claim Adjustment Reason Code list (the official descriptions are published by X12 and are its copyrighted work); appealability verdicts are editorial guidance grounded in payer-filed denial data and published payer policies. Educational billing reference only — not billing, legal, or clinical advice. Plan contracts control individual outcomes. ## Direct answer On a dental remittance, code CO 97 means: The payer considers this service's value included in the payment for another service already adjudicated — a bundling adjustment. depends: check the facts first. Split by cause: a policy-stated bundle (buildup-into-crown without pre-op evidence of separate necessity) is close to unwinnable after the fact. A bundling edit misapplied to genuinely distinct services on different teeth or dates is winnable with charting that shows the separation. ## What it means in dental context Dental's signature bundle: core buildup (D2950) folded into the crown fee. Also irrigation folded into SRP and limited exams folded into periodic exams within the payer's window. Payer policies state these combinations — some are contractual and final, some hinge on documentation of separate necessity. ## Appealability: Depends — check the facts first Contractual variants of this denial are final; factual-error variants are winnable. Run the checks on this page before spending the appeal window. Split by cause: a policy-stated bundle (buildup-into-crown without pre-op evidence of separate necessity) is close to unwinnable after the fact. A bundling edit misapplied to genuinely distinct services on different teeth or dates is winnable with charting that shows the separation. ## What to do 1. Identify which service the payer bundled this one into (the ERA shows the adjudicated pair) 2. Check the payer's published bundling rule for the pair before drafting anything 3. If the services were clinically distinct, appeal with site- and date-specific documentation ## Documentation pages for this denial family - [Core buildup (D2950) — payer documentation requirements](https://dentovio.com/dental-claim-documentation/d2950-core-buildup/index.html.md) - [Crowns (D2710–D2799) — payer documentation requirements](https://dentovio.com/dental-claim-documentation/d2740-crowns/index.html.md) ## Official source - X12 Claim Adjustment Reason Codes (official descriptions): - HIPAA adoption of the 835 remittance standard that carries these codes (45 CFR 162.1602): ## Related - [All dental denial codes](https://dentovio.com/dental-claim-denial-codes/index.html.md) - [Payer documentation requirements](https://dentovio.com/dental-claim-documentation/index.html.md) - [Dental insurance prompt-pay laws by state](https://dentovio.com/dental-prompt-pay-laws/index.html.md)