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    OpenPayerPolicy UpdatesClinical/Medical PolicyWPS NPWT/VAC Coverage Policy Update | OpenPayer
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    CurrentWPS Health InsurancePolicy 250-0034-1812

    Durable Medical Equipment (DME): Negative Pressure Wound Therapy (NPWT), Vacuum-Assisted Wound Closure (VAC) Medical Guideline

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    This guideline governs coverage of negative pressure wound therapy (NPWT), also called vacuum-assisted wound closure (VAC), including the pump, dressing kits, and canister sets. It applies to providers seeking coverage for members when the therapy is medically necessary under the listed wound indications, comprehensive wound-program requirements, and plan terms.

    Policy Summary
    PayerWPS Health Insurance
    PolicyNegative Pressure Wound Therapy (NPWT) / VAC
    Policy CodePolicy 250-0034-1812
    Change TypeNo material change
    Effective DateOct 1, 2026
    Last ReviewSep 10, 2026
    Next Review DateNot specified
    Key ActionReview the member's contract and endorsements for applicable exclusions, prior-authorization requirements, and benefit requirements before requesting coverage.
    SourceLink
    POLICY UPDATE CHANGES

    No material clinical or coverage changes in this revision.

    30 daysInitial authorization period
    Every 30 daysExtension request frequency
    15Dressing kits per wound/month
    10

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    Canister sets per month
    >90 mL/dayHigh-volume drainage threshold

    Negative Pressure Wound Therapy Coverage Criteria

    Initial NPWT Coverage

    Coverage requires that both the wound indication criteria and the comprehensive wound program criteria below are met.

    ALL of the following

    • A. Wound is ONE of the following

      • Diabetic (neuropathic) ulcer/wound

        • Wagner grade 1 ulcer/wound that has not responded to at least 30 days of other conventional wound treatments.
        • Wagner grade 2 or higher ulcer/wound that has not responded within 30 days of wound treatment.
      • Stage III or IV pressure ulcer that has not improved with conventional wound/ulcer treatment of at least 30 days.
      • Venous or arterial insufficiency ulcer that has not improved with conventional wound/ulcer treatment of at least 30 days.
      • Post-sternotomy wound or post-surgical mediastinitis.
      • Open dehisced surgical wound.
      • Skin graft, flap, or dermal substitute for an acute or chronic wound.
      • Open fracture, as a bridge to definitive closure when primary closure is not possible after or between debridements.
      • Fasciotomy wound.
      • Post-amputation diabetic wound.

    • B. Comprehensive wound program includes ALL of the following

      • Appropriate medical management of the causal or contributing medical condition(s) is in place, such as medical and nutritional management for diabetes or lower-extremity elevation and compression garments/bandages for venous insufficiency.
      • Nutritional and hydration status have been evaluated and are being managed as appropriate to support optimal wound healing.
      • Environmental and positional/pressure concerns have been evaluated and addressed as appropriate, including frequent repositioning, offloading, properly fitted devices or braces, and incontinence management.
      • Smoking status has been evaluated and smoking-cessation assistance/resources have been offered as appropriate.
      • A comprehensive wound assessment is completed and documented weekly by a licensed medical professional.

    Continuation Therapy

    The pump rental and NPWT supplies may be approved for 30 days when the initial criteria are met. Continued use beyond 30 days requires an extension request every 30 days with updated wound-assessment documentation for review by the Health Plan Medical Director.

    Continued coverage requires ALL of the following

    • All Initial NPWT Coverage criteria in A and B remain met.
    • Updated wound-assessment documentation demonstrates progressive wound improvement or healing.

    Review the contract and endorsements for exclusions, prior-authorization requirements, and other benefit requirements. NPWT used for a condition or diagnosis other than one listed in the Indications of Coverage is considered experimental, investigational, and unproven to affect health outcomes. When the condition or diagnosis is listed but the coverage criteria are not met, NPWT is considered not medically necessary.

    The following are considered experimental, investigational, and unproven to affect health outcomes: single-use, disposable, non-powered, or mechanical NPWT devices, including but not limited to PICO, SNAP, and UNO; NPWT with instillation (NPWTi); the ABTHERA® Open Abdomen Negative Pressure Therapy System; and WoundVision Scout®.

    NPWT is also considered experimental, investigational, and unproven for pilonidal disease, cyst, or sinus; partial-thickness burn; infected bypass graft on the lower extremity; necrotizing fasciitis; esophageal perforation or leak; prevention of surgical-site infection; prophylactic use after surgery; or use in conjunction with hyperbaric oxygen therapy or bioengineered skin substitutes.

    NPWT is considered not medically necessary when any of the following are present: malignancy or cancer in the wound; untreated soft-tissue infection or osteomyelitis near the wound; necrotic tissue with eschar in the wound; a fistula to an organ or body cavity near the wound; exposed vital structures, including nerves, an anastomotic site, vasculature, or organs; uniform granulation tissue has formed; a closed, clean, non-infected incision; a non-infected cesarean section; or a closed surgical incision following total joint arthroplasty.

    More than one NPWT pump billed per individual for the same dates of service or time span is considered not medically necessary, because tubing can typically be bridged between wounds to use one pump. Rental charges exceeding the purchase price of the device may be limited by the applicable health plan.

    Up to a maximum of 15 dressing kits per wound per month is considered medically necessary, unless documentation shows that the wound size requires more than one dressing kit for each dressing change.

    Up to a maximum of 10 canister sets per month is considered medically necessary, unless documentation shows large-volume drainage exceeding 90 mL of exudate per day. For high-volume exudative wounds, a stationary pump with the largest-capacity canister must be used. Excess canister utilization attributable to equipment failure, rather than excessive drainage volume, is not medically necessary.

    Treatment and Supply Utilization Parameters

    Conventional wound treatment failure
    Wagner grade 1 diabetic ulcerAt least 30 days of other conventional wound treatments without response
    Wagner grade 2 or higher diabetic ulcerNo response within 30 days of wound treatment
    Stage III or IV pressure ulcerNo improvement with conventional wound or ulcer treatment for at least 30 days
    Venous or arterial insufficiency ulcerNo improvement with conventional wound or ulcer treatment for at least 30 days
    Dressing kit utilization
    Standard allowanceUp to a maximum of 15 dressing kits per wound per month

    Authorization, Billing, and Coverage Actions

    Prior Authorization

    Verify plan requirements and obtain authorization

    Review the member’s contract and endorsements for applicable exclusions, prior-authorization requirements, and benefit requirements before requesting coverage. When the coverage criteria are met, the NPWT pump rental and supplies may be approved for 30 days; continued use requires an extension request every 30 days.

    Documentation Required

    Include the required submission documentation

    Submit a Standard Written Order prescribed by a qualified healthcare provider concerning the member’s diagnosis, together with medical-record information supporting medical necessity and continued need or use when applicable.

    • Document all comprehensive wound-program components.
    • Include wound-assessment notes.
    • Submit correct coding for the item or service that meets all coding guidelines.

    Therapy Overview

    Negative pressure wound therapy (NPWT), also called vacuum-assisted wound closure, applies controlled continuous or intermittent negative pressure, or vacuum suction, across a wound. A sealed foam or gauze dressing connects through tubing to a pump and collection canister, which removes wound drainage and supports healing in selected acute or chronic wounds. Coverage requires the therapy to be part of a comprehensive wound program that addresses the causal condition, nutrition and hydration, pressure or environmental factors, smoking, and weekly wound assessment.

    Key Terms

    Negative pressure wound therapy (NPWT)
    TherapyDistributes negative pressure, or vacuum suction, across a wound to remove drainage and promote wound healing
    Dressing and sealUses foam or gauze in the wound bed covered by a clear adhesive dressing that creates a seal and maintains a warm, moist environment
    Pump and tubingTubing connects the sealed dressing to a pump that applies continuous or intermittent negative pressure at variable levels
    Collection canisterHolds drainage pulled from the wound
    Vacuum-assisted wound closure (VAC)
    Alternate nameVacuum-assisted wound closure (VAC) is another name for negative pressure wound therapy (NPWT)

    Equipment and Supply Limits

    Equipment and Supply Utilization

    Equipment and supplies are medically necessary within the stated utilization limits unless the applicable documentation exception is met.

    Dressing kits: Up to 15 dressing kits per wound per month are medically necessary; more may be supported when documentation shows the wound size requires more than one dressing kit for each dressing change.15 kits per wound per month

    Additional kits require documentation of wound size and the need for more than one kit per dressing change.

    Canister sets: Up to 10 canister sets per month are medically necessary; more may be supported when documentation shows large-volume drainage greater than 90 mL of exudate per day. For high-volume exudative wounds, a stationary pump with the largest-capacity canister must be used.10 canister sets per month; greater than 90 mL of exudate per day for the exception

    Excess canister utilization caused by equipment failure rather than drainage volume is not medically necessary.

    Equipment Rental and Purchase Provisions

    SupplyCovered utilization limitException
    Dressing kits
    Up to 15 kits per wound per month
    Additional kits may be supported when documentation shows the wound requires more than one dressing kit for each dressing change.
    Canister sets
    Up to 10 canister sets per month
    Additional sets may be supported when documentation shows drainage greater than 90 mL of exudate per day. For high-volume exudative wounds, use a stationary pump with the largest-capacity canister.
    DeviceCapped-rental provision
    NPWT devices
    Rental charges exceeding the device purchase price may be limited by the member’s health plan.

    Required Clinical Documentation

    Documentation Required

    Obtain a complete Standard Written Order

    Obtain a Standard Written Order prescribed by a qualified healthcare provider concerning the member’s diagnosis. Support the order with medical records documenting medical necessity, the comprehensive wound-program components, wound assessments, continued need and use when applicable, and correct coding.

    • Address the causal or contributing condition.
    • Evaluate and manage nutritional and hydration status as appropriate.
    • Evaluate and address environmental and positional or pressure concerns as appropriate.
    • Evaluate smoking status and offer cessation assistance or resources as appropriate.
    • Complete and document a comprehensive wound assessment weekly by a licensed medical professional.
    Documentation Required

    Support each 30-day continuation request

    Submit updated wound-assessment documentation with each extension request beyond the initial 30 days for continued medical-necessity review by the Health Plan Medical Director. The documentation must demonstrate progressive wound improvement or healing.

    Excluded Devices and Uses

    The following NPWT devices or uses are not covered: single-use, disposable, non-powered, or mechanical devices, including PICO, SNap, and UNO; NPWT with instillation; the ABTHERA Open Abdomen Negative Pressure Therapy System; and WoundVision Scout. Excluded uses also include pilonidal disease, partial-thickness burns, infected lower-extremity bypass grafts, necrotizing fasciitis, esophageal perforation or leak, prevention of surgical-site infection, prophylactic postoperative use, and use with hyperbaric oxygen therapy or bioengineered skin substitutes.

    Policy Summary
    PayerWPS Health Insurance
    PolicyNegative Pressure Wound Therapy (NPWT) / VAC
    Policy CodePolicy 250-0034-1812
    Change TypeNo material change
    Effective DateOct 1, 2026
    Last ReviewSep 10, 2026
    Next Review DateNot specified
    Key ActionReview the member's contract and endorsements for applicable exclusions, prior-authorization requirements, and benefit requirements before requesting coverage.
    SourceLink
    On This Page
    Negative Pressure Wound Therapy Coverage CriteriaTreatment and Supply Utilization ParametersAuthorization, Billing, and Coverage ActionsTherapy OverviewKey TermsEquipment and Supply LimitsEquipment Rental and Purchase ProvisionsRequired Clinical DocumentationExcluded Devices and Uses
    Documentation exception
    Additional kits may be medically necessary when documentation shows the wound size requires more than one dressing kit for each dressing change
    Utilization basisThe limit applies to dressing kits used for negative pressure wound therapy
    Canister utilization
    Standard allowanceUp to a maximum of 10 canister sets per month
    High-volume drainage exceptionAdditional canister sets may be medically necessary when documentation shows drainage greater than 90 mL of exudate per day
    Required equipment for high-volume woundsA stationary pump with the largest-capacity canister must be used for high-volume exudative wounds
    Documentation Required

    Document continued improvement every 30 days

    For each extension beyond the initial 30-day authorization, submit updated wound-assessment documentation for continued medical-necessity review by the Health Plan Medical Director. The assessment must demonstrate progressive wound improvement or healing.

    • Submit an extension request every 30 days.
    • Continue to meet the initial coverage criteria.
    Denial Risk

    Flag unlisted indications

    Use for a condition or diagnosis not listed in the indications of coverage is considered experimental, investigational, and unproven and will not be covered.

    Denial Risk

    Confirm the criteria are met

    Use for a listed indication when the stated medical-necessity criteria are not met is considered not medically necessary.

    Denial Risk

    Avoid experimental or unproven uses

    Experimental, investigational, or unproven devices, treatment uses, and listed conditions are not covered. This includes specified disposable or mechanical devices, NPWT with instillation, ABTHERA, WoundVision Scout, and the listed treatment conditions.

    • Single-use, disposable, non-powered, or mechanical devices, including PICO, SNap, and UNO, are included.
    • Listed conditions include pilonidal disease, partial-thickness burn, infected lower-extremity bypass graft, necrotizing fasciitis, and esophageal perforation or leak.
    • Prophylactic use, prevention of surgical-site infection, and use with hyperbaric oxygen therapy or bioengineered skin substitutes are included.
    Billing Rule

    Do not bill duplicate NPWT pumps

    More than one NPWT pump billed per individual for the same dates of service or time span is considered not medically necessary. Bridge the tubing from each wound when appropriate to enable use of only one pump for multiple wounds.

    Billing Rule

    Check rental charges against the purchase price

    Payment of rental charges exceeding the purchase price of the device may be limited by the member’s health plan.

    Therapeutic methodVAC uses vacuum suction distributed across a wound to remove drainage and promote wound healing
    System componentsThe system includes a sealed wound dressing, tubing, pump, and collection canister
    Durable medical equipment (DME)
    Prescription requirementEquipment must be prescribed by a qualified healthcare provider for a medical reason
    General usefulnessThe equipment is not typically useful to someone without a health condition
    Intended settingThe equipment is primarily intended for use in the member's home
  1. An extension request is required every 30 days.
  2. The initial coverage criteria must continue to be met.