Neg prs wnd ther dme>50 sqcm
CPT 97606 covers negative pressure wound therapy using durable medical equipment for wounds larger than 50 square centimeters. This involves applying controlled suction to large wounds to promote healing.
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
Billing tips
Document precise wound measurements in square centimeters at each visit to justify 97606 versus 97605 (wounds ≤50 sq cm)
Impact: Coding error between 97605 and 97606 results in $21.68 payment difference ($50.14 vs $28.46 non-facility); incorrect smaller code costs $21.68 per visit
Bill in non-facility settings when possible to capture the $24.59 higher reimbursement compared to facility rate
Impact: Non-facility rate ($50.14) pays 96% more than facility rate ($25.55); annual volume of 100 treatments yields $2,459 additional revenue in office setting
For multiple wounds totaling >50 sq cm, bill a single unit of 97606 rather than multiple units, as this is a per-session code not per-wound
Impact: Prevents denials for excessive units and potential fraud investigation; most payers allow only one unit per session regardless of number of wounds treated
Document the medical necessity for NPWT versus standard wound care, including failed conservative treatments and wound progression photos
Impact: NPWT requires prior authorization from most payers; incomplete medical necessity documentation causes 40-60% of prior auth denials, delaying care and payment
Bill on the date of application/change, not equipment delivery date, and ensure therapy notes document hands-on skilled service
Impact: Payment requires skilled therapeutic intervention; billing for equipment-only visits without therapy documentation results in denials and potential recoupment
Verify patient has not exceeded therapy caps when using GN modifier and document complexity factors justifying continued NPWT beyond typical healing timeframes
Impact: Medicare therapy cap is $2,240 for PT/SLP combined in 2025; exceeding cap without exception documentation triggers automatic payment suspension
Common denials
Insufficient documentation of wound size measurement to support >50 sq cm requirement
How to appeal: Submit detailed wound assessment with length × width measurements, calculation methodology, and photographic documentation with measurement ruler visible. Include wound diagrams showing measurement technique per established wound care standards.
Medical necessity not established or lack of prior authorization for NPWT equipment
How to appeal: Provide comprehensive wound history documenting failed conservative treatments (minimum 30 days standard care), wound characteristics meeting LCD criteria, clinical rationale for NPWT, and expected treatment duration. Submit supporting literature for complex cases.
Services denied as bundled with E/M or other wound care procedures performed same day
How to appeal: Resubmit with appropriate modifier (25 for E/M, 59 for distinct procedural service) and documentation clearly distinguishing separate services. Include time-stamped notes showing distinct nature of each service and separate medical necessity.
Denial for exceeding frequency limitations or therapy caps without exception documentation
How to appeal: Submit clinical documentation justifying continued NPWT beyond typical duration, including wound measurements showing ongoing progress, complications preventing normal healing, and treatment plan adjustments. Request manual review with KX modifier attestation for medically necessary services exceeding caps.
Frequently asked questions
What is the difference between CPT 97605 and 97606?
CPT 97605 is used for negative pressure wound therapy on wounds 50 square centimeters or smaller, while 97606 is for wounds greater than 50 square centimeters. The wound size determines code selection, with 97606 reimbursing $50.14 (non-facility) compared to $28.46 for 97605 in 2025. Accurate measurement documentation is critical as this represents a $21.68 payment difference.
How often can CPT 97606 be billed for the same patient?
CPT 97606 can typically be billed 2-3 times per week during active NPWT treatment, corresponding to dressing change frequency. However, specific frequency limits vary by payer LCD/LCA policies. Medicare and most commercial payers require medical necessity documentation for treatment extending beyond 4-6 weeks, with some requiring prior authorization for continued therapy beyond initial approval periods.
Does CPT 97606 include the cost of NPWT equipment and supplies?
No, CPT 97606 covers only the professional application, monitoring, and adjustment of NPWT by a qualified healthcare provider. The NPWT equipment, pumps, and supplies are billed separately using HCPCS durable medical equipment codes (E2402 for stationary pump, A6550 for wound care set). The DME supplier bills the equipment while the provider bills 97606 for the skilled service.
Can CPT 97606 be billed with an E/M code on the same day?
Yes, CPT 97606 can be billed with an evaluation and management code on the same day when a significant, separately identifiable E/M service is performed and documented. Append modifier 25 to the E/M code and ensure documentation clearly distinguishes the separate nature of the wound assessment/treatment decision-making from the NPWT application service to prevent bundling denials.
What is the 2025 Medicare reimbursement for CPT 97606?
The 2025 Medicare national average reimbursement for CPT 97606 is $50.14 for non-facility settings and $25.55 for facility settings. The code has 1.55 total RVUs (0.6 work RVU, 0.94 non-facility PE RVU, 0.18 facility PE RVU, 0.01 MP RVU) multiplied by the 2025 conversion factor of 32.3465. Actual payment varies by geographic locality adjustment.
Is prior authorization required for CPT 97606?
Prior authorization requirements for CPT 97606 vary by payer. While Medicare does not require prior authorization for the professional application service itself, many Medicare Advantage and commercial plans do require authorization. The associated NPWT DME equipment almost universally requires prior authorization. Check specific payer policies and obtain authorization before initiating treatment to avoid denials.
Who can perform and bill CPT 97606 services?
CPT 97606 can be performed and billed by licensed physical therapists, physicians (wound care specialists, surgeons, podiatrists), and other qualified healthcare professionals operating within their scope of practice under state licensure laws. Some states allow occupational therapists or nurses with wound certification to perform NPWT under physician supervision. Payer credentialing and supervision requirements vary, so verify specific billing privileges with each payer.