Currentpriority healthPolicy N/A

JW and JZ drug dosing modifiers

Policy defines use, reporting and billing requirements for JW (drug discarded) and JZ (zero drug discarded) modifiers for drugs separately payable under Medicare Part B supplied in single‑dose/single‑use containers; affects providers submitting claims to Priority Health.

Policy Summary

Payerpriority health

PolicyJW and JZ drug dosing modifiers

Policy CodePolicy N/A

Change TypeNew policy (April 2026)

Effective Date

Next Review Date

Key ActionFollow the billing instructions: report JW with two claim lines when drug is wasted and report JZ on a single claim line when no drug is discarded, and retain documentation to substantiate reported waste.

SourceLink

POLICY UPDATE CHANGES

New policy created in April 2026 establishing JW/JZ modifier guidance for Priority Health.

2017-01-01Priority Health adopted CMS requirement to append JW to obtain payment for discarded amounts

2023-07-01Effective date aligning JZ requirement when no drug is discarded

1Claim line for JZ (single line submission for no waste)

2Claim lines required when reporting JW (separate lines for given and wasted drug)

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This policy defines Priority Health's billing requirements for the JW and JZ drug dosing modifiers for drugs separately payable under Medicare Part B that are supplied in a single‑dose container / single‑use package. The policy's coverage stance is focused on billing rules, specifying when to use JW to report discarded drug amounts and when to use JZ to indicate no discarded amount, consistent with CMS guidance and recent modifier requirements.

Policy scope, subject, disclaimer, and references

ScopePolicy defines use, reporting and billing requirements for JW (drug discarded) and JZ (zero drug discarded) modifiers for drugs separately payable under Medicare Part B supplied in single‑dose/single‑use containers; affects providers submitting claims to Priority Health.

SubjectJW and JZ drug dosing modifiers

DisclaimerCMS and/or MDHHS guidance applies unless otherwise specified; failure to follow coding, billing, or documentation requirements may result in claim denial, recoupment, or recovery. Policy may be superseded by contracts, state or federal mandates.

ReferencesCMS JW modifier fact sheet; CMS JZ modifier fact sheet; Medicare Claims Processing Manual, Chapter 17 on Drugs and Biologicals; CMS JW and JZ policy FAQs; MM13056 - New JZ Claims Modifier for Certain Medicare Part B Drugs

Policy change noteNew policy created in April 2026 establishing JW/JZ modifier guidance for Priority Health.

Clinical and Administrative Background

Priority Health adopted CMS guidance requiring the JW modifier to be appended to obtain payment for discarded amounts effective January 1, 2017, and aligned with CMS in requiring the JZ modifier when no drug is discarded effective July 1, 2023. Providers must follow standard billing and coding guidelines (including CMS NCCI), maintain complete medical record documentation to substantiate discarded quantities, and understand that failure to follow coding, billing, or documentation requirements may result in claim denial, recoupment, or recovery.

Modifier and Claim Line Coding

Modifier codesModifier

JW	Drug amount discarded/not administered to any patient — used to identify discarded doses from single‑use container
JZ	Zero drug amount discarded/not administered to any patient — used to identify that no amount was discarded

HCPCS drug line reportingHCPCS

HCPCS (general)

Policy requires HCPCS code for drug be reported on claim lines; when reporting waste submit two claim lines (line 1: HCPCS for drug given without modifier; line 2: same HCPCS with JW modifier for wasted amount). For no waste submit single claim line with HCPCS and JZ modifier.

For claim-line submission, report a single complete claim line with the HCPCS code, JZ modifier, units given, and charge when no drug is discarded. When waste occurs, submit two separate claim lines using the same HCPCS: line 1 for the drug given (no modifier) with units and charge for the amount administered; and line 2 for the wasted drug with the JW modifier, units wasted, and charge for the wasted amount. Units reported must correspond to the smallest dose (vial) available from the manufacturer or pharmacy, and discarded amounts must be documented in the medical record to support the reported waste.

Billing, Documentation, and Prior Authorization Requirements

Billing Rule

Reporting JW (wasted drug)

When drug is discarded from a single-use vial, submit two claim lines: line 1 with the HCPCS for the drug given (no modifier), units given, and charge for amount given; line 2 with the same HCPCS plus JW to indicate waste, units wasted, and charge for amount wasted. Units reported must correspond with the smallest dose (vial) available from the manufacturer or pharmacy.

Affected codes: JW modifier; HCPCS drug code must be reported on claim lines
Units/reporting rule: Report two claim lines — one for amount given (no modifier) and one with JW for amount wasted; units reported must correspond to the smallest dose (vial) available

Billing Rule

Reporting JZ (no waste)

When no drug is discarded, submit a single claim line with the HCPCS code, the JZ modifier, number of units given, and charge for the amount given.

Affected codes: JZ modifier; report HCPCS drug code on the single claim line
Submission instruction: Submit one complete claim line with HCPCS + JZ, units given, and charge for amount given

Billing Rule

Prohibited modifier use

Do not append JW or JZ to drugs supplied in multi-dose containers, packaged OPPS/ASC drugs, or drugs administered in FQHC or RHC settings; appending both JW and JZ on the same claim line is inappropriate and will cause denial.

Prohibitions: Do not use JW or JZ on drugs from multi-dose containers
Prohibitions: Do not apply JW or JZ to packaged OPPS/ASC drugs
Prohibitions: Do not apply JW or JZ to drugs administered in FQHC or RHC settings
Prohibitions: Do not append JW and JZ together on the same claim line

Documentation Required

Documentation requirement for waste

Providers must document discarded doses/quantities in the medical record to support reported waste; documentation must substantiate the procedure performed and the quantities billed.

Requirement: Medical record must document discarded doses/quantities to substantiate billed waste

Prior Authorization

Medicare PSOD requirement

For indications that do not meet an NCD, local LCD, or a specific medical policy, a Pre-Service Organization Determination (PSOD) must be completed as described in the Provider Manual.

Requirement: Complete a PSOD for indications not covered by NCD/LCD or specific medical policy

Billing Rule

Modifier application standards

Follow CMS/NCCI billing and coding guidance; apply modifiers only when supported by documentation and in accordance with CMS guidance.

Standard: Apply modifiers per CMS/NCCI guidance
Standard: Use modifiers only when documentation supports the reported modifier

Defined Terms

Definitions

Single‑dose container / single‑use packageDrugs described as supplied in a single‑dose container or single‑use package based on FDA‑approved labeling (applies to JW/JZ modifier policy).

JWModifier indicating drug amount discarded/not administered to any patient; used to identify discarded doses from a single‑use vial or single‑use packaging. Units reported must correspond with the smallest dose (vial) available from the manufacturer or pharmacy.

JZModifier indicating zero drug amount discarded/not administered to any patient; required to be reported when no drug is discarded (effective July 1, 2023 alignment with CMS).

Separately payable drugsDrugs payable under Medicare Part B that are billed separately; the JW/JZ modifier policy applies to these when supplied in single‑dose containers or single‑use packages.

OpenPayer

JW and JZ drug dosing modifiers

Policy Snapshot

Clinical and Administrative Background

Modifier and Claim Line Coding

Billing, Documentation, and Prior Authorization Requirements

Defined Terms

Policy Update Changes

At-a-Glance Metrics