CurrentAmbetter NevadaPolicy WA.CP.MP.518

Negative Pressure Wound Therapy for Home Use

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Establishes medical-necessity criteria, continuation limits, discontinuation conditions, and billing guidance for home negative pressure wound therapy for eligible members with open, low-healing, or nonhealing wounds.

Policy Summary

PayerAmbetter Nevada

PolicyNegative Pressure Wound Therapy for Home Use

Policy CodePolicy WA.CP.MP.518

Change TypeNo material changes

Effective DateSep 1, 2026

Last ReviewJun 1, 2026

Next Review DateNot specified

Key ActionDocument an open wound, inpatient NPWT need, qualifying wound-therapy history or contraindication, and measurable wound progress.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

4 monthsMaximum NPWT treatment period

10 per 30 daysMedicaid disposable canister limit

2 pathwaysCoverage qualification pathways

3 HCPCS codesReferenced equipment and supply codes

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CurrentAmbetter NevadaPolicy WA.CP.MP.518

Negative Pressure Wound Therapy for Home Use

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Sign up for Ambetter Nevada Policy WA.CP.MP.518 alerts

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Policy Summary

PayerAmbetter Nevada

PolicyNegative Pressure Wound Therapy for Home Use

Policy CodePolicy WA.CP.MP.518

Change TypeNo material changes

Effective DateSep 1, 2026

Last ReviewJun 1, 2026

Next Review DateNot specified

Key ActionDocument an open wound, inpatient NPWT need, qualifying wound-therapy history or contraindication, and measurable wound progress.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

4 monthsMaximum NPWT treatment period

10 per 30 daysMedicaid disposable canister limit

2 pathwaysCoverage qualification pathways

3 HCPCS codesReferenced equipment and supply codes

Medical Necessity and Continuation Criteria

Initial Therapy

Home NPWT is medically necessary when all required conditions are met.

Initial home-use eligibility

Wound-therapy qualification
- Failed therapy: A complete wound therapy program has been tried and failed.
- Contraindicated therapy: Complete wound therapy programs are contraindicated.

Continuation Therapy

Coverage may continue only before either discontinuation condition occurs.

Continued coverage

Ongoing wound response: Measurable wound healing has occurred during the prior month.Improvement in wound surface area, calculated as length times width, or wound depth
Treatment-duration limit not reached: Fewer than four months have elapsed using an NPWT pump for treatment of the most recent wound.Up to four months
Inpatient NPWT time before discharge counts toward the four-month maximum.

Coverage is discontinued when any measurable degree of wound healing has failed to occur during the prior month. Wound healing is measured by improvement in the wound’s surface area, calculated as length multiplied by width, or in the wound’s depth.

Coverage is discontinued when four months have elapsed using an NPWT pump to treat the most recent wound. The four-month period includes NPWT applied during the inpatient stay before discharge.

Equipment, Supply Codes, and Limits

Referenced HCPCS CodesHCPCS

A7000	Canister, disposable, used with suction pump, each.
A6550	Wound care set, for negative pressure wound therapy electrical pump, includes all supplies and accessories.
E2402	Negative pressure wound therapy electrical pump, stationary or portable

Maximum Treatment Duration

Maximum durationUp to four months

Treatment scopeUse of an NPWT pump for the most recent wound

Inpatient timeNPWT use during the inpatient stay before discharge counts toward the four-month limit

Healing Monitoring Period

Monitoring periodPrior month

Required outcomeAny measurable degree of wound healing must occur during the prior month

Coverage impact

Documentation, Eligibility, and Billing Actions

Step Therapy

Conventional Wound Therapy Prerequisite

Before requesting or continuing home NPWT, document that a complete wound therapy program was either tried and failed or is contraindicated, consistent with InterQual requirements.

Document the applicable therapy program and whether it was completed and failed or was contraindicated.
Do not rely on home NPWT eligibility unless one of these pathways is established.

Documentation Required

Medical-Necessity and Progress Documentation

The record must support medical necessity for home NPWT and show ongoing wound progress. Include documentation of the open wound, the need for NPWT during the inpatient hospital stay, the applicable complete wound therapy program, and measurable wound status over time.

Open wound requiring NPWT during an inpatient hospital stay.
Complete wound therapy program tried and failed, or contraindicated.

About Home Negative Pressure Wound Therapy

Negative pressure wound therapy (NPWT) uses a suction pump and wound dressing system to support treatment of open wounds that are low-healing or nonhealing. Under this policy, home NPWT is considered medically necessary in the specified inpatient-transition context and may continue only while measurable wound healing occurs and the maximum treatment period has not been reached.

Key Policy Definitions

Wound Healing

Healing measureImprovement in the wound surface area or depth

Surface area calculationWound surface area is calculated as length times width

Depth measureImprovement in the depth of the wound qualifies as healing

Home-Use NPWT

TimingProvided after an inpatient hospital stay

Wound requirementThe member has an open wound

Inpatient treatment requirementThe member required NPWT during the inpatient stay

Policy Summary

PayerAmbetter Nevada

PolicyNegative Pressure Wound Therapy for Home Use

Policy CodePolicy WA.CP.MP.518

Change TypeNo material changes

Effective DateSep 1, 2026

Last ReviewJun 1, 2026

Next Review DateNot specified

Key ActionDocument an open wound, inpatient NPWT need, qualifying wound-therapy history or contraindication, and measurable wound progress.

SourceLink

On This Page

Coverage is discontinued when measurable wound healing has failed to occur during the prior month

Medicaid Disposable Canister Limit

Canister codeA7000

Quantity limit10 disposable canisters

Frequency limitEvery 30 days

Pump requirementCanisters may only be billed with the E2402 pump

Wound measurements and progress, including surface area (length × width) or depth.

Medical-necessity determination under applicable InterQual guidelines.

Documentation Required

Treatment-Duration Tracking

Track the treatment period from the first inpatient application of the NPWT device and maintain the cumulative pump-use duration for the most recent wound.

Record the date of the first inpatient NPWT application.
Include inpatient NPWT time before discharge when calculating duration.
Track cumulative pump use for the most recent wound against the four-month maximum.

Denial Risk

Initial Eligibility Not Established

Home NPWT coverage is not established when the record does not demonstrate an open wound requiring NPWT during an inpatient hospital stay or does not establish an eligible conventional wound-therapy pathway.

Deny or do not continue coverage when the inpatient NPWT need is not documented.
Deny or do not continue coverage when a complete wound therapy program was neither tried and failed nor shown to be contraindicated.

Denial Risk

No Healing or Maximum Duration Reached

Discontinue home NPWT coverage when no measurable healing has occurred during the prior month or when four months of NPWT pump use for the most recent wound have elapsed.

Measurable healing means improvement in wound surface area (length × width) or depth.
The four-month period includes NPWT applied in the inpatient setting before discharge home.

Billing Rule

Canister Billing Limit

For Medicaid claims, disposable canisters (A7000) may be billed only with the NPWT pump (E2402) and are limited to 10 canisters per 30 days.

Deny A7000 when billed without E2402.
Deny quantities exceeding 10 A7000 canisters in a 30-day period.