CurrentAnthemPolicy C-09006

Modifiers 59 and XE/XP/XS/XU Distinct Procedural Service - Professional

Defines Anthem's reimbursement rules for use of Modifier 59 and the X{EPSU} modifiers to indicate distinct or independent procedures/services billed by the same provider on the same day; applies to commercial professional claims governed by this policy.

Policy Summary

PayerAnthem

PolicyModifiers 59 and XE/XP/XS/XU Distinct Procedural Service - Professional

Policy CodePolicy C-09006

Change TypeRelated Coding addition

Effective Date07/01/2026

Next Review Date

Key ActionProvide requested documentation promptly for post-payment review to avoid claim denial or recoupment.

SourceLink

POLICY UPDATE CHANGES

Updated Related Coding section by adding code pair J1202 when reported with G0138.

C-09006Policy identifier

07/01/2026Effective date

04/01/2026Last review

NCCI PTPCoding edit framework

Recoupment possibleAudit action

Reimbursement and Coverage Criteria

Reimbursement criteria for Modifier 59 and X{EPSU}

Reimbursement allowed when modifier use appropriately indicates a distinct/independent service and is supported by coding rules and documentation; certain situations and code pairs are nonreimbursable.

All of the following must be met:

Modifier and coding framework
- Procedure or service billed with Modifier 59 or an X modifier (XE, XP, XS, XU) to indicate the service is distinct or independent from other services performed the same day by the same provider.
- Modifier use aligns with CMS NCCI Procedure-to-Procedure (PTP) edit guidelines (NCCI Column 1/Column 2); Modifiers 59 or X{EPSU} may be appended to the paid or denied code.
Modifier 59 is used only if no more descriptive X{EPSU} modifier is available and Modifier 59 is not appended to the same claim line item as an X{EPSU} modifier.

Policy Summary

PayerAnthem

PolicyModifiers 59 and XE/XP/XS/XU Distinct Procedural Service - Professional

Policy CodePolicy C-09006

Change TypeRelated Coding addition

Effective Date07/01/2026

Next Review Date

Key ActionProvide requested documentation promptly for post-payment review to avoid claim denial or recoupment.

SourceLink

On This Page

Reimbursement may be withheld or reversed if any of the following apply:

The denial of a code is supported by CPT parenthetical language indicating the code is not reportable 'with' specific other codes.
Multiple procedures were performed on the same anatomical digit by the same provider during the same operative session (code pairing not allowed).
The service is part of a code pair listed in the Related Coding table that does not allow override with Modifier 59 or X{EPSU}.
See Related Coding section for specific nonreimbursable code pairs.
Requested documentation is not provided, or provided documentation does not support the billed services; the plan may deny the claim and recover/recoup payments.

Related Coding and Modifier Usage

Related Coding - example added pairCPTNot Covered

J1202 reported with G0138

Code pair added to Related Coding section as nonreimbursable when reported together.

Modifier 59 use restriction

Use restrictionModifier 59 should only be used if no more descriptive X{EPSU} modifier (XE, XP, XS, XU) is available.

Mutual exclusivity on claim lineModifier 59 should not be appended to the same claim line item as any X{EPSU} modifier.

Operational caveat — NCCI editsModifier 59 or X{EPSU} may be appended to the paid or denied code consistent with NCCI Column 1/Column 2 edits.

Post-payment reviewThe health plan reserves the right to perform post-payment review of claims submitted with Modifier 59 and X{EPSU} and may request additional documentation.

Consequences of non-complianceIf requested documentation is not provided or does not support billed services, the plan may deny the claim and recover/recoup payments.

Provider Responsibilities and Review Process

Documentation Required

Post-payment review and documentation requests

The health plan reserves the right to perform post-payment review of claims submitted with Modifier 59 and X{EPSU}. Providers may be asked to submit additional documentation, including medical records or other supporting materials, to validate the services billed. If requested documentation is not provided or does not support the services billed for the episode of care, the health plan may deny the claim and/or recover/recoup monies previously paid. The health plan is not liable for interest or penalties when payment is denied or recouped because the provider fails to submit required or requested documentation.

Post-payment review may include clinical record requests and claim audit.
Requested documentation may include medical records or other documentation not directly related to the member if relevant to support the claim.
If documentation is not provided or is insufficient, the plan may deny the claim or recover/recoup payment.
Modifier 59 and X{EPSU}: the plan may review claims billed with these modifiers and apply NCCI Column 1/Column 2 edits; Modifiers 59 or X{EPSU} may be appended to the paid or denied code.
Modifier 59 should only be used if no more descriptive modifier is available (XE, XP, XS, XU) and should not be appended to the same claim line as X{EPSU}.

Definitions: Modifier 59 and X Modifiers

Modifier 59 and X{EPSU} — definition & relationship

High-level definitionModifier 59 and the X{EPSU} modifiers (XE, XP, XS, XU) indicate procedures or services that are distinct or independent from other services performed the same day by the same provider.

Relationship to NCCIThe health plan follows CMS NCCI Procedure-to-Procedure (PTP) edit guidelines when assessing use of Modifier 59 and X{EPSU} modifiers.

Modifier 59 reserved statusModifier 59 is reserved for situations where no more descriptive X{EPSU} modifier exists and best explains the circumstances.

X modifier definitions

XESeparate encounter — a service that is distinct because it occurred during a separate encounter.

XPSeparate practitioner — a service that is distinct because it was performed by a different practitioner.

XSSeparate structure — a service that is distinct because it was performed on a separate organ/structure.

XUUnusual non-overlapping service — a service that is distinct because it does not overlap usual components of the main service.