Low frequency non-thermal us
CPT code 97610 covers low frequency, non-thermal ultrasound therapy—a type of therapeutic ultrasound that uses sound waves without producing heat to promote wound healing and tissue repair. This is distinct from diagnostic ultrasound imaging and thermal therapeutic ultrasound.
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
Billing tips
Verify place of service coding accuracy—the reimbursement difference between POS 11 (office, $397.22) and POS 22 (hospital outpatient, $17.14) is $380.08 per treatment
Impact: Incorrect POS coding can result in $380.08 underpayment per session; over a typical 12-session wound care course, this equals $4,560.96 in lost revenue
Document specific ultrasound parameters including frequency (kHz), treatment duration in minutes, wound measurements before/during treatment course, and rationale for choosing non-thermal ultrasound over alternative modalities
Impact: Comprehensive parameter documentation reduces denial rate by approximately 40-60% and strengthens medical necessity in appeals
Bill only once per day regardless of number of wounds treated; CPT 97610 is not a per-wound code but rather a timed service that can address multiple wounds in one application session
Impact: Prevents upcoding denials and potential fraud allegations; submitting multiple units for same-day service on different wounds typically results in denial of all but one unit
Establish medical necessity by documenting failed conventional wound care for minimum 4 weeks before initiating 97610; include previous treatments attempted and wound progress measurements
Impact: Payers typically require evidence of treatment failure with standard care; lack of this documentation results in 70-80% denial rate for medical necessity
Bundle 97610 into the global wound care plan with clear treatment goals and expected duration; reassess and document wound healing progress every 2-3 weeks with objective measurements
Impact: Ongoing medical necessity documentation supports authorization for typical 8-12 treatment courses; poor progress documentation often triggers denials after 4-6 treatments
Verify LCD (Local Coverage Determination) requirements for your MAC region, as coverage criteria for advanced wound therapies vary significantly by jurisdiction
Impact: Some MACs require pre-authorization or specific wound staging criteria; non-compliance can result in 100% denial even with otherwise proper documentation
Common denials
Medical necessity not established—payer states that conventional wound care was not attempted or documented for sufficient duration before advanced therapy
How to appeal: Submit detailed treatment timeline showing minimum 4 weeks of standard wound care with measurements, photographic documentation if available, and clinical notes demonstrating inadequate healing response (less than 10-15% reduction in wound size). Include clinical rationale for escalation to advanced modality and peer-reviewed literature supporting low frequency ultrasound for the specific wound type.
Experimental or investigational—payer claims insufficient evidence supporting low frequency non-thermal ultrasound for the documented wound type or condition
How to appeal: Cite FDA clearance for the specific device used (510(k) clearance), reference clinical practice guidelines from wound care societies (WOCN, APWCA) that include non-thermal ultrasound in treatment algorithms, and submit published studies demonstrating efficacy. Request peer-to-peer review with medical director to discuss evidence base and clinical outcomes in your patient population.
Incorrect place of service resulting in claim adjudication at facility rate when service was performed in non-facility setting, or vice versa
How to appeal: Submit corrected claim with proper POS code, provide facility documentation (letterhead, address verification) confirming actual service location, and include attestation from treating provider. Request retroactive adjustment to correct payment rate with explanation that original POS was clerical error.
Bundling denial when billed same day as debridement (11042-11047) or other wound care procedures—payer considers 97610 inclusive to other services
How to appeal: Document that 97610 is a distinct therapeutic modality performed separately from debridement, with separate clinical purpose (tissue regeneration vs. tissue removal). Add modifier 59 or XU to indicate distinct procedural service, provide timeline showing debridement performed first followed by separate ultrasound application, and cite CMS guidance that therapeutic procedures are separately reportable from wound preparation.
Frequently asked questions
What is the Medicare reimbursement rate for CPT 97610 in 2025?
The 2025 Medicare national average reimbursement for CPT 97610 is $397.22 in non-facility settings and $17.14 in facility settings. The non-facility rate applies to physician offices, outpatient PT clinics, and wound care centers, while the facility rate applies to hospital outpatient departments and other institutional settings where facility overhead is separately reimbursed.
How many times can you bill CPT 97610 per day?
CPT 97610 should typically be billed only once per day regardless of the number of wounds treated, as it represents a timed service session rather than a per-wound code. The treatment can address multiple wound sites during a single application session. Billing multiple units on the same day for different wounds is generally considered inappropriate and will likely result in denial of duplicate charges.
What is the difference between CPT 97610 and diagnostic ultrasound codes?
CPT 97610 is a therapeutic procedure using low frequency (20-40 kHz) non-thermal ultrasound specifically for wound healing, while diagnostic ultrasound codes (76000 series) are imaging procedures using higher frequency (2-15 MHz) sound waves to visualize internal structures. They serve completely different purposes, use different equipment, and have different documentation requirements. 97610 is performed by therapists or wound care specialists, while diagnostic ultrasound is typically performed by sonographers or radiologists.
Does CPT 97610 require prior authorization from Medicare or private insurers?
Prior authorization requirements vary by payer and region. Original Medicare does not typically require prior authorization for 97610, but many Medicare Advantage plans do require it. Commercial insurers frequently require prior authorization and may have specific coverage criteria including minimum duration of failed conventional therapy, specific wound types covered, and limits on number of authorized treatments. Always verify authorization requirements with the specific payer before initiating treatment.
Can CPT 97610 be billed with debridement codes on the same day?
Yes, CPT 97610 can be billed with debridement codes (11042-11047, 97597-97598) on the same day as they are distinct services with different therapeutic purposes—debridement removes nonviable tissue while ultrasound stimulates healing. However, you should append modifier 59 or XU to 97610 to indicate it is a separately identifiable service, and documentation must clearly show both procedures were medically necessary and performed as distinct interventions, typically with debridement performed first followed by ultrasound application.
What documentation is required to support medical necessity for CPT 97610?
Medical necessity documentation must include: wound classification and measurements, minimum 4 weeks of documented conventional wound care with patient response, clinical rationale for advancing to non-thermal ultrasound therapy, treatment parameters (frequency, duration, intensity), ongoing wound measurements showing progress or justifying continued treatment, and reassessment notes every 2-3 weeks. The documentation should demonstrate why less costly conventional treatments are inadequate and how ultrasound therapy specifically addresses the patient's wound healing needs.
What are the RVU values for CPT 97610 in 2025?
For 2025, CPT 97610 has a Work RVU of 0.4, non-facility Practice Expense RVU of 11.87, facility Practice Expense RVU of 0.12, and Malpractice RVU of 0.01, for a total non-facility RVU of 12.28. The high PE RVU reflects the significant equipment costs for specialized low frequency ultrasound devices. These RVUs multiplied by the 2025 conversion factor of 32.3465 determine the Medicare payment rates.