Currentpriority healthPolicy N/A

NEGATIVE PRESSURE WOUND THERAPY PUMPS

This reimbursement/coding policy governs coverage, coding, documentation, and frequency limits for negative pressure wound therapy pumps, supplies, and related services for Priority Health members (Commercial, Medicare per CMS, and Medicaid per MDHHS).

Policy Summary

Payerpriority health

PolicyNegative Pressure Wound Therapy Pumps

Policy CodePolicy N/A

Change TypeFrequency limits added

Effective DateAug 25, 2025

Next Review DateFeb 2, 2025

Key ActionFor Medicare cases not meeting NCD/LCD or policy, submit a Pre-Service Organization Determination (PSOD) with required documentation including wound measurements, prior treatments, dressing frequency, and exudate quantity.

SourceLink

POLICY UPDATE CHANGES

Added Frequency Limits for A6550, A7000 and E2402 effective Aug. 25, 2025.

Added 'Disclaimer' section.

15A6550 per wound / month

10A7000 canisters / month

1E2402 pumps / month

90 ml/daydrainage threshold

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Coverage Criteria and Billing Rules

Coverage criteria and billing rules

Coverage is provided with coding and documentation requirements; frequency limits apply to supplies and equipment.

A diagnosis code for the treated wound must be included on each claim for equipment and related supplies.

Clinical documentation must include history, previous treatment regimens (if applicable), current wound management, length of sessions of use, dressing types and frequency of change, changes in wound conditions, precise wound measurements (length, width, depth), quantity of exudate, presence of granulation and necrotic tissue, and measures being addressed relevant to treatment; quantitative wound measurements must be documented at least monthly to show progress.

Wound evaluation and treatment documentation must indicate regular evaluation and treatment of the wounds; a statement from the provider describing the initial condition of the wound (including measurements) and efforts to address all aspects of wound care must be present.

If NPWT is initiated during an inpatient stay, the initial inpatient date of service must be documented to accurately account for duration of treatment.

For NPWT that exceeds four months, consideration for one additional month at a time may be granted through an appeal.

NPWT is defined as a system that contains a pump (E2402), dressing sets (A6550) and a separate collection canister (A7000); systems missing these required components are not considered NPWT.

ALL of the following

Coding and frequency limits
- E2402 — Negative pressure wound therapy electrical pump, stationary or portable: limit 1 per month.
- A6550 — Wound care set for NPWT (includes all supplies and accessories): maximum 15 dressing kits per wound per month.
- A7000 — Disposable canister used with suction pump: maximum 10 canister sets per month; may exceed the 10-per-month limit if documentation evidences a large volume of drainage (greater than 90 ml of exudate per day).

Applicable CPT/HCPCS codes include NPWT session codes (97605, 97606, 97607, 97608) and DME/supply codes (E2402, A6550, A7000) which must be billed as appropriate to the service provided.

Codes, Frequency Limits, and Thresholds

A7000 monthly limit threshold

A7000 monthly limit10 canister sets per month

Documented-exception thresholdMay exceed 10/month if documentation shows large volume drainage (> 90 ml of exudate per day)

Related code descriptionA7000 - Canister, disposable, used with suction pump, each

A6550 monthly limit

A6550 monthly limitMaximum 15 dressing kits per wound per month

Related code descriptionA6550 - Wound care set, for negative pressure wound therapy electrical pump, includes all supplies and accessories

Prior Authorization and Documentation Requirements

Prior Authorization

Prior Authorization Required

Prior authorization is required for certain members and indications. For Medicare members, if the indication does not meet criteria of an applicable NCD, LCD, or specific medical policy, a Pre-Service Organization Determination (PSOD) must be completed. Review the Provider Manual for full PSOD instructions. Failure to obtain required prior authorization/PSOD may result in claim denial or delayed payment.

PSOD required when NCD/LCD or specific medical policy criteria are not met (Medicare).
Document the initial inpatient date of service when NPWT is initiated during an inpatient stay to account for duration of treatment.
Requests for NPWT continuing beyond four months may be considered one additional month at a time via appeal.

Documentation Required

Documentation Requirements

Comprehensive clinical documentation must accompany prior authorization requests and claims to support medical necessity. Inadequate or missing documentation increases risk of denial.

Key Definitions

Negative Pressure Wound Therapy (NPWT) definition

DefinitionNegative Pressure Wound Therapy (NPWT) is the application of sub-atmospheric pressure to a wound to remove exudate and debris, delivered through a system that consists of a suction pump, separate exudate collection chamber (canister) and dressing sets.

System componentsCore components include a suction pump (E2402), dressing sets (A6550), and a separate disposable collection canister (A7000).

Therapy descriptionThe system applies negative pressure to ensure exudate is removed from the wound site and collected in the chamber, facilitating wound drainage and management.

Exclusion noteWound suction systems that do not contain all required components (pump, dressing set, and separate collection chamber) are not classified as NPWT.

Policy Summary

Payerpriority health

PolicyNegative Pressure Wound Therapy Pumps

Policy CodePolicy N/A

Change TypeFrequency limits added

Effective DateAug 25, 2025

Next Review DateFeb 2, 2025

SourceLink

On This Page

Limit applies per wound site (per wound per month)

E2402 frequency

E2402 frequency limit1 pump per month

Related code descriptionE2402 - Negative pressure wound therapy electrical pump, stationary or portable

Billing noteFrequency limit reported as code=1 in frequency table (1 = Limit)

Provide history and prior treatment regimens, current wound management, session lengths, dressing types and change frequency.
Record changes in wound condition, presence of granulation or necrotic tissue, and quantity of exudate.
Enter quantitative wound measurements (length, width, depth, drainage) at least monthly; month-to-month comparisons must use like measurements.
Include a provider statement describing the initial wound condition (with measurements) and efforts undertaken for wound care.
If NPWT initiation occurs during an inpatient stay, document the initial inpatient date of service.

Denial Risk

Provider Actions & Denial Risk

Action steps for providers: obtain required prior authorization/PSOD when applicable, attach complete wound evaluation and monthly measurement documentation, and include inpatient initiation date if applicable. Missing required documentation or failing to obtain authorization may result in denial—submit appeals for continued therapy beyond four months as noted.

Obtain PSOD for Medicare indications not covered by NCD/LCD/policy before service.
Attach monthly quantitative wound measurements and narrative progress notes to prior authorization and claims.
Document inpatient start date when NPWT begins during an inpatient stay.
If continuation beyond four months is needed, file an appeal requesting one month extensions with supporting documentation.