Coding Rules/Advanced/28 minutes/Reviewed 2026-07-10

NCCI Procedure-to-Procedure Edits

Read Column One, Column Two, and modifier indicators before deciding whether services may be reported together.

Quick answer

A Medicare NCCI PTP edit identifies code pairs that generally should not be paid together for the same beneficiary and date. The Column Two code denies unless the edit permits a modifier and the clinical facts support a valid exception.

Rules to know

Use the edit file effective for the date of service.
Modifier indicator 1 does not mean a modifier is automatically appropriate.
Modifier indicator 0 means the edit is not bypassed with an NCCI-associated modifier.
NCCI files do not establish benefit coverage.

Operational workflow

01Identify claim setting and date of service.
02Check the current practitioner or outpatient hospital PTP file.
03Read the code pair and modifier indicator.
04Compare the record to NCCI policy-manual rationale.
05Use a modifier only when a documented distinct circumstance exists.

Common failure modes

Appending modifier 59 only because Column Two denied.
Using the wrong quarter or claim-setting file.
Assuming separate claim lines prove separate services.

Knowledge check

What does modifier indicator 1 establish?

The claim will payA modifier may bypass the edit when facts support itBoth services are always coveredThe code pair is obsolete

Official sources

Medicare NCCI Procedure-to-Procedure EditsCenters for Medicare & Medicaid ServicesReviewed 2026-07-10 National Correct Coding Initiative for MedicareCenters for Medicare & Medicaid ServicesReviewed 2026-07-10 Medicare NCCI FAQ LibraryCenters for Medicare & Medicaid ServicesReviewed 2026-07-10

Continue this track

AdvancedMedically Unlikely Edits and Units of Service AdvancedModifier 59 and XE, XP, XS, XU

Education only. Verify the current code set, payer contract, coverage policy, implementation guide, and claim-specific facts. Do not enter protected health information into this site.