What Is the 97 Denial Code?
CARC 97 is the X12-standardized denial code meaning 'Payment is included in the allowance for another service/procedure' — the payer is saying the billed service was already paid as a component of another code on the claim, typically because the two codes appear as a bundled pair on the CMS NCCI Procedure-to-Procedure edit table. CO-97 is the version most often seen on commercial claims (CO = Contractual Obligation provider write-off). The fix depends on the NCCI Modifier Indicator: 0 = cannot unbundle, 1 = unbundle with modifier 59 or X-modifier, 9 = edit deleted.
- Modifier Indicator 1 unbundles with 59, XE, XS, XP, or XU
- Modifier Indicator 0 = final, not appealable, write-off
- X-modifiers preferred over 59 (Medicare audits 59 aggressively)
- First-level appeal success: 50-70% with documentation supporting distinctness
What Is the 97 Denial Code?
By MedPrecision Operations Team · Published
Denial code 97 is a Claim Adjustment Reason Code (CARC) meaning 'Payment is included in the allowance for another service/procedure.' In plain language: the payer believes this service was already paid as part of a different code on the same claim. CARC 97 is one of the most common denial codes in surgical, orthopedic, dermatology, and procedure-heavy specialties because it is triggered automatically by NCCI Procedure-to-Procedure (PTP) edits whenever two codes that CMS considers bundled appear together — even when both were legitimately performed and separately documentable. This guide explains exactly what triggers a 97 denial, how to fix it with the correct modifier, when the denial is correct (and you should not appeal), and how to prevent it before the claim ever leaves the practice.
What CARC 97 Means in Plain Language
CARC 97 is the standardized X12 code payers use to communicate: 'We are not paying for this line item because we already paid for it as part of another code on the claim.' The official X12 definition is 'Payment is included in the allowance for another service/procedure.' In practice this almost always means one of three things: 1. **NCCI bundling edit.** The two CPT codes you billed are listed in the National Correct Coding Initiative (NCCI) Procedure-to-Procedure (PTP) edit table as a bundled pair, and the payer applied the edit automatically. 2. **Global surgical package.** The service you billed falls inside the 0-day, 10-day, or 90-day global period of a major procedure already paid on the claim. Pre-op visits, routine post-op care, and minor wound checks inside the global period are not separately payable. 3. **Inherent component coding.** The code you billed describes a step that is already inherent to the primary procedure (for example, surgical access, closure of the same incision, or a fluoroscopic guidance code that is included in the parent CPT description). The denial is communicated on the 835 ERA paired with a Group Code (usually CO — Contractual Obligation) and often a RARC giving more detail. CO-97 is the version you will see most often: contractual obligation, bundled service. CARC 97 is informational about the relationship between codes — it says nothing about whether the service was performed or documented. Two codes can be billed correctly, both performed, both documented, and still hit a 97 denial because of an NCCI edit that is overridable with the right modifier.
When CARC 97 Is Triggered
Three operational scenarios produce roughly 90% of CARC 97 denials. **Scenario 1: NCCI PTP edit between two CPT codes on the same claim.** CMS publishes the NCCI PTP edit table quarterly. Each edit has a Column 1 code (the full code that gets paid) and a Column 2 code (the component code that gets denied as bundled into Column 1). Each edit also has a Modifier Indicator: 0 (cannot be unbundled), 1 (can be unbundled with an appropriate modifier), or 9 (edit deleted). When you bill a Column 1 / Column 2 pair without a modifier, the Column 2 code denies CO-97. Common examples: 17000 (destruction of premalignant lesion) bundled with 11102 (tangential biopsy) on the same DOS; 64483 (transforaminal epidural injection) bundled with 77003 (fluoroscopic guidance) — fluoro is included in 64483. **Scenario 2: Service inside a global period.** When a major surgery is billed with a 90-day global, related E/M visits and minor procedures performed by the same provider inside that 90 days deny CO-97 unless an appropriate global-modifier (24, 25, 57, 58, 78, 79) is appended. **Scenario 3: Mutually exclusive code combination.** NCCI also publishes Mutually Exclusive Edits (MEE) — code pairs that should never be billed together because they describe procedures that cannot reasonably be performed in the same session. These also deny CO-97. The distinction matters because the fix differs. PTP edits with a Modifier Indicator of 1 can be unbundled with modifier 59 (or the more specific X-modifiers) when documentation supports it. PTP edits with Modifier Indicator 0 cannot be unbundled — the denial is final and the service is a write-off if both codes were legitimately performed.
The Modifier 59 / X-Modifier Fix
The most common fix for CARC 97 is appending modifier 59 — or, preferably, one of the more specific X-modifiers — to the Column 2 code when documentation supports a separate, distinct service. **Modifier 59 (Distinct Procedural Service)** indicates the procedure was performed at a different anatomic site, on a different lesion, in a different session, or for a different injury than the Column 1 code. CMS introduced 59 in 1996 as a universal unbundling modifier, but its overuse led to the X-modifiers in 2015. **The X-modifiers (preferred when applicable):** - **XE** — Separate Encounter. Service distinct because it occurred during a separate encounter on the same DOS. - **XS** — Separate Structure. Service distinct because it was performed on a separate organ or anatomic structure. - **XP** — Separate Practitioner. Service distinct because it was performed by a different practitioner. - **XU** — Unusual Non-Overlapping Service. Service distinct because it does not overlap usual components of the main service. Medicare and many commercial payers prefer X-modifiers over 59 when the situation fits. Use the most specific modifier the documentation supports. **Critical documentation requirement.** Modifier 59 / X-modifier appeals only succeed when the operative or progress note explicitly documents the distinct nature of the service: the different lesion, the separate site, the separate encounter time, or the unrelated indication. A common audit failure is billing 59 without documentation that supports the distinction. Payers (especially Medicare and Medicare Advantage) audit modifier 59 use aggressively; misuse can trigger pre-payment review or RAC audit. Before appending modifier 59, the documentation must answer: 'What specifically makes this Column 2 service distinct from the Column 1 service?'
When CARC 97 Is Correct vs When to Appeal
Not every CARC 97 denial is wrong. Knowing when to appeal versus accept is the difference between a productive denial workflow and a wasted one. **The denial is correct (do not appeal) when:** - The two codes are on the NCCI PTP table with Modifier Indicator 0 — bundling cannot be overridden regardless of documentation. - Documentation does not support a distinct service. If the operative note describes the Column 2 service as part of the workflow for the Column 1 procedure, the bundling is appropriate. - The service is inherent to the primary procedure (surgical access, closure of the same incision, intra-operative imaging that is included in the CPT descriptor, draping/positioning). - The E/M visit was the routine pre-op or post-op check inside a global period without a separately identifiable problem. **The denial is wrong (appeal it) when:** - The Column 2 service was performed at a separate anatomic site, on a separate lesion, in a separate session, or for an unrelated indication, AND documentation clearly establishes the distinction, AND the PTP edit has Modifier Indicator 1. - A significant, separately identifiable E/M service was performed on the same day as a procedure (modifier 25 territory, but sometimes denies as 97 when 25 was missing). - The payer applied the bundling edit incorrectly — for example, applied an NCCI edit that was deleted in a more recent quarterly update. **Appeal package for a CARC 97 reversal:** original claim, EOB, operative note or progress note with the distinct service highlighted, the correct modifier (59, XE, XS, XP, or XU) appended to a corrected claim, and a one-paragraph cover letter citing the specific NCCI edit table reference and the documentation passage that establishes distinctness. First-level appeal success rate when documentation genuinely supports the modifier is typically 50–70%.
Related CARC Codes You Will See Alongside 97
CARC 97 rarely appears in isolation. Several related codes show up on the same denial worklist and need similar workflow treatment. **CARC 95 — Plan procedures not followed.** Issued when a payer-specific procedural requirement (referral, prior auth, network rule) was not met. Sometimes substituted for 97 by certain commercial payers. **CARC 16 — Claim/service lacks information.** Often paired with 97 when the payer needs additional documentation to evaluate whether a modifier was appropriate. The fix is to submit the requested documentation, not to appeal the 97 directly. **CARC B15 — This service/procedure requires that a qualifying service/procedure be received and covered.** Used when a procedure is dependent on a primary service that was not paid (often global-period related). **CARC 236 — This procedure or procedure/modifier combination is not compatible with another procedure or procedure/modifier combination provided on the same day according to the National Correct Coding Initiative.** This is the explicit NCCI-flag version of 97. When you see 236, the message is unambiguous: NCCI edit triggered. **CARC 18 — Exact duplicate claim/service.** Sometimes appears when a corrected claim with modifier 59 is submitted as a new claim line instead of a corrected claim. Resubmit as a corrected claim, not a new line. **CARC 50 — These services are non-covered services because this is not deemed medically necessary.** Distinct from 97, but sometimes the underlying issue is bundling reframed as medical necessity. Appeal path differs. Working the 97 denial worklist effectively means knowing which related codes signal the same root cause (bundling/NCCI) and which signal a different problem entirely.
Preventing CARC 97 With NCCI PTP Edit Scrubbing
Working CARC 97 denials reactively is expensive. Preventing them with pre-submission scrubbing is the higher-ROI workflow. **Step 1: Implement NCCI PTP edit scrubbing in your claim scrubber.** Most modern practice management systems and clearinghouses include the CMS NCCI PTP edit table as a built-in rule set. Confirm yours does, and confirm the edit table is updated quarterly when CMS publishes new edits (January, April, July, October). An out-of-date NCCI table generates either false-positive scrub flags (annoying) or missed denials (expensive). **Step 2: Review the top 20 NCCI edits affecting your specialty.** Every specialty has a recurring set of bundling edits. Orthopedics: 20610 (joint injection) bundled with various procedure codes; dermatology: 17000 series bundled with 11102 (biopsy); pain management: 64483/64484 bundled with 77003 (fluoroscopic guidance); cardiology: 93306 (echo) bundled with 93308 (limited echo). Knowing the top 20 for your specialty lets you train providers on documentation patterns that support the modifier when distinct services are performed. **Step 3: Document distinctness at the point of care, not at the point of billing.** The modifier 59 / X-modifier fix only works if documentation supports the distinction. Provider templates should prompt for distinct-service language whenever an NCCI bundled pair is performed: 'Separate lesion at [site],' 'Separate encounter at [time],' 'Unrelated indication: [indication].' Adding this prompt to EHR templates eliminates 60–80% of modifier-59 audit failures. **Step 4: Reference the NCCI edit table directly when in doubt.** CMS publishes the NCCI PTP edit table at cms.gov/medicare/coding-billing/national-correct-coding-initiative-ncci-edits. Each edit shows Column 1 code, Column 2 code, Modifier Indicator (0 = cannot unbundle, 1 = can unbundle with modifier, 9 = deleted), and effective date. When a denial arrives, looking up the edit confirms whether it can be appealed.
What This Means Operationally
A practice running clean on CARC 97 denials does five things consistently: 1. **NCCI PTP edits are scrubbed pre-submission**, with the edit table refreshed quarterly. False-positive scrub flags are reviewed by a coder before the claim leaves. 2. **Provider documentation templates prompt for distinct-service language** whenever an NCCI bundled pair is in play. The documentation is created at the encounter, not retrofitted at appeal time. 3. **Modifier 59 is reserved for true Column-2-distinct cases**, and X-modifiers are used in preference whenever the distinction is more specifically described by XE, XS, XP, or XU. 4. **Denial worklist categorizes 97 by NCCI Modifier Indicator** so that the team knows immediately which denials are appealable and which are write-offs. Modifier Indicator 0 denials should not be appealed — they are coding errors that need to be prevented next time. 5. **The top 20 specialty-specific NCCI edits are tracked monthly** with appeal success rate by edit. Patterns reveal which edits the practice is consistently appealing successfully (continue) and which the practice is appealing with poor success (stop, retrain providers on documentation, or accept the bundling). Practices that operationalize these five disciplines typically reduce CARC 97 denial volume by 60–80% within 90 days and recover 50–70% of the remaining 97 denials through correctly modifier-supported appeals.
Common Questions
Common questions about 97 denial code explained: what it means and how to fix it.
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Get a Free Billing Audit arrow_forwardWhat is the 97 denial code in medical billing?
CARC 97 means 'Payment is included in the allowance for another service/procedure.' The payer is saying the service you billed has already been paid as a component of a different code on the same claim — usually because the two codes are listed as a bundled pair in the CMS National Correct Coding Initiative (NCCI) Procedure-to-Procedure edit table. CO-97 is the version most often seen on commercial claims (Group Code CO = Contractual Obligation, Reason Code 97 = Bundled). The denial is informational about the code relationship — it says nothing about whether the service was performed or documented. The fix depends on whether the NCCI edit's Modifier Indicator allows unbundling.
How do I fix a CARC 97 denial?
First, look up the two codes on the NCCI PTP edit table at cms.gov to confirm the bundling edit and check the Modifier Indicator. If the indicator is 1, the edit can be unbundled with an appropriate modifier when documentation supports a distinct service — append modifier 59, or one of the more specific X-modifiers (XE for separate encounter, XS for separate structure, XP for separate practitioner, XU for unusual non-overlapping service), to the Column 2 code and resubmit as a corrected claim. If the indicator is 0, the edit cannot be unbundled and the denial is final. If the indicator is 9, the edit was deleted and the original denial was incorrect — appeal with the deletion date cited.
When should I use modifier 59 vs an X-modifier for CARC 97?
Use the X-modifier whenever the documentation supports a more specific reason for distinctness, because Medicare and many commercial payers audit modifier 59 use more aggressively than the X-modifiers. XE is for services on the same date but in a separate encounter. XS is for services on separate anatomic structures or organs. XP is for services performed by a separate practitioner. XU is for unusual non-overlapping services that do not duplicate the main procedure's typical components. Modifier 59 remains appropriate when none of the X-modifiers fit but the service is still distinct. The documentation must explicitly establish the distinction; a 59 or X-modifier without supporting documentation will fail audit.
Can I appeal a 97 denial successfully?
Yes, when the NCCI PTP Modifier Indicator is 1 and the operative or progress note documents a genuinely distinct service. First-level appeal success rates with documentation that clearly supports the modifier are typically 50–70%. The appeal package needs the original claim, EOB, the operative or progress note with the distinct service highlighted, a corrected claim with modifier 59 or the appropriate X-modifier on the Column 2 code, and a brief cover letter referencing the NCCI edit table entry and the documentation passage. When the NCCI Modifier Indicator is 0, the denial is final and not appealable — the bundling is by CMS rule and no documentation overrides it. When the indicator is 9, the edit was deleted and the appeal should cite the deletion.
What is the difference between CARC 97 and CARC 236?
Both relate to NCCI bundling, but CARC 236 is more specific: 'This procedure or procedure/modifier combination is not compatible with another procedure or procedure/modifier combination provided on the same day according to the National Correct Coding Initiative.' CARC 97 is broader — 'Payment is included in the allowance for another service/procedure' — and can apply to NCCI bundling, global surgical package bundling, or inherent-component bundling. When you see 236, the trigger is unambiguously an NCCI edit. When you see 97, the trigger could be NCCI, a global period, or an inherent component, and the worklist categorization needs to identify which. The fix workflow is similar (modifier review and corrected claim), but the appeal documentation differs by underlying cause.
How do I prevent CARC 97 denials before they happen?
Implement NCCI PTP edit scrubbing pre-submission with the edit table refreshed every quarter when CMS publishes updates (January, April, July, October). Train providers to document distinct-service language whenever an NCCI bundled pair is performed: separate lesion, separate site, separate encounter, unrelated indication. Add EHR template prompts for the top 20 NCCI edits that affect your specialty. Reserve modifier 59 for cases where no X-modifier fits, and prefer XE, XS, XP, or XU when applicable. Review the NCCI Modifier Indicator before billing — if it is 0, the codes cannot be unbundled regardless of documentation, and one of them must be removed from the claim. Practices that follow these steps typically reduce CARC 97 volume 60–80% in 90 days.
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