CARC 97: Service Bundled into Another Payment

What CARC 97 Actually Means

CARC 97 is a bundling denial. The payer is telling you that one of the procedures on your claim is considered part of another procedure that was already paid — either on the same claim or on a prior claim. The payment for the comprehensive procedure is considered to include the payment for the component procedure.

This is one of the most misunderstood denial codes in billing, because sometimes the payer is correct and sometimes they're not. Knowing the difference is what determines whether you write it off or fight it.

When the Denial Is Correct

Bundling rules are defined by CCI (Correct Coding Initiative) edits. When a procedure is on the CCI edit list as a component of another procedure, the payer is right to bundle it. Common examples:

• Billing a surgical approach code separately from the primary surgical procedure
• Billing an E/M visit on the same day as a procedure without a separately identifiable reason
• Billing a component code when the comprehensive code was already paid

In these cases, the denial is correct. Write it off to the appropriate contractual adjustment code and move on.

When the Denial Is Wrong — and Recoverable

CARC 97 is worth fighting when the two procedures are genuinely distinct services that happened to occur on the same date or during the same encounter. The key question: were the services performed at separate sites, in separate sessions, or on separate injuries/anatomical locations?

If yes, modifier -59 (or the X-modifiers: XE, XS, XP, XU) exists precisely to unbundle services that were legitimately separate. The modifier tells the payer: "I know these codes normally bundle, but they don't in this specific case because the services were distinct."

How to Appeal a CARC 97 Denial

A CARC 97 appeal with modifier -59 will fail without the documentation to back it up. Payers have become much more aggressive about requesting operative notes, progress notes, and session records when -59 is used. Your appeal needs:

1. Confirm the CCI edit. Look up the two codes in the CCI edit table. If there is a modifier indicator of "1," the edit can be overridden with a modifier. If the indicator is "0," it cannot be overridden — the bundling is absolute.
2. Add the appropriate modifier. Use -59 or the more specific X-modifier (XE for separate encounter, XS for separate structure, XP for separate practitioner, XU for unusual non-overlapping service).
3. Submit with documentation. Include the clinical notes that show the distinct service — separate operative reports, different anatomical sites clearly identified, or documentation of separate sessions.
4. Write a cover letter explaining why the services are not bundled in this specific case, citing the CCI modifier indicator and your supporting documentation.

How to Prevent It

• Run CCI edits as part of your pre-submission claims scrubber — most clearinghouses offer this
• When two codes are CCI-related, review the encounter documentation before submission to determine if -59 is warranted
• Train coders to distinguish comprehensive from component codes in your specialty's most common procedure combinations
• Track your CARC 97 denials by procedure code pair — you'll find the same combinations appearing repeatedly, which tells you exactly where to build a claim review step