Negative pressure wound therapy (NPWT) applied using durable medical equipment to a wound or combined wound area exceeding 50 square centimeters.

Verified May 8, 2026 · 6 sources ↓

Medicare: $50.44
Work RVU: 0.59
Global, days
Region: General

Drawn from CMSSummitrcmKzanowSprypt

Documentation requirements

What must appear in the operative or office note to support the claim.

Source · Editorial brief grounded in 6 cited references ↓

Exact wound measurements with total surface area documented as greater than 50 sq cm
Identification of the DME NPWT system by brand and model, confirming non-disposable device
Dressing type specified (foam or gauze) along with negative pressure level and settings
Wound assessment including tissue type, exudate, and current wound status
Seal verification and pump function confirmation at each session
Physician order for NPWT with documented clinical justification for medical necessity
Response to therapy noted — progress or lack of progress toward healing
Patient or caregiver education documented if applicable

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

59 Distinct service KX Documentation on file LT Left side RT Right side

What this code covers

Source · Editorial summary grounded in 6 cited references ↓

97606 covers NPWT sessions where a non-disposable DME pump delivers controlled subatmospheric pressure through a sealed dressing to evacuate fluids and promote healing on large wounds. The defining threshold is total wound surface area greater than 50 sq cm — if the wound is 50 sq cm or smaller, bill 97605 instead. The DME distinction matters too: if a disposable, single-use system is used, bill 97607 (≤50 sq cm) or 97608 (>50 sq cm), not 97605/97606.

97606 carries a global period of XXX, meaning standard surgical global rules do not apply. The code is billed per session, not per wound, and only one NPWT code is billable per session regardless of wound count. NCCI policy explicitly bundles low-frequency non-contact ultrasound (97610) with active wound care management codes 97597–97606 when treating the same wound on the same date — do not bill both.

A critical coverage rule: 97605/97606 apply only to open wound sites. If a wound vac is placed over a surgically closed incision, it functions as a dressing and is not separately billable. Medicare covers NPWT when medically necessary and physician-ordered; many private payers require prior authorization. Modifier 51 exemption applies — do not append modifier 51 to NPWT codes.

RVU & reimbursement

Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU vs. total RVU

The work RVU (0.59) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (1.51) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	0.59
Practice expense RVU	0.91
Malpractice RVU	0.01
Total RVU	1.51
Medicare national rate	$50.44
Global period	days

Payment by site of service

Medicare pays different rates by setting. HOPD typically pays substantially more than ASC for the same procedure.

Source · CMS OPPS Addendum B·ASC HCPCS payment rates·2026

Setting	Medicare rate (national)
Office (PFS non-facility) Procedure performed in physician's office	$50.44
HOPD (APC 5052) Hospital outpatient department	$415.32

Common denial reasons

The recurring reasons claims for CPT 97606 get rejected.

Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓

Wound size not documented or total area not clearly exceeding 50 sq cm threshold
DME device details (brand, model, non-disposable status) absent from the record
97606 billed over a surgically closed incision — wound vac used as a dressing is not separately reportable
97610 billed same-day for the same wound — NCCI bundles low-frequency ultrasound with 97597–97606
Missing physician order or lack of documented clinical necessity for NPWT
Prior authorization not obtained for private payer claims requiring it

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 6 cited references ↓

01What is the size threshold that separates 97605 from 97606?

97605 covers wounds 50 sq cm or smaller. 97606 covers wounds with a total surface area greater than 50 sq cm. If you have multiple wounds in a single session, add the areas together to determine which code applies.

02Can I bill 97606 when a wound vac is placed over a closed surgical incision?

No. NPWT codes 97605 and 97606 are only reportable on open wound sites. A wound vac placed over a surgically closed incision is considered a dressing and is not separately billable.

03Can I bill 97606 and 97610 for the same wound on the same date?

No. NCCI policy bundles CPT 97610 (low-frequency non-contact ultrasound) with active wound care management codes 97597–97606 when applied to the same wound on the same date of service.

04Should modifier 51 be appended to 97606 when billing with another procedure?

No. NPWT codes are exempt from modifier 51. Do not append it. Use modifier 59 only if NPWT is performed as a distinct service separate from another same-day wound procedure on a different wound.

05When is modifier KX appropriate with 97606?

Append modifier KX on Medicare claims to attest that documentation supports the medical necessity criteria defined in the applicable LCD. It confirms the patient meets coverage requirements and that supporting documentation is on file.

06How does 97606 differ from 97608?

Both cover wounds greater than 50 sq cm, but 97606 is used when a non-disposable DME pump system is applied. 97608 is used when a disposable, single-use NPWT device is applied to the same wound size range.

07Is 97606 subject to a surgical global period?

No. 97606 carries a global period of XXX, which means standard 10- or 90-day global package rules do not apply. Each treatment session is billed independently.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

Mira's AI scribe captures wound location, measured dimensions (length × width in cm), total surface area, DME device brand and model, dressing type, pressure settings, seal integrity, and the clinician's wound assessment from dictation. That prevents the two most common 97606 denials: missing wound size documentation and absent DME device details.

See how Mira captures CPT 97606 documentation