Summary & Overview
HCPCS K1004: Low Frequency Ultrasonic Diathermy Device for Home Use
HCPCS Level II code K1004 covers a low frequency ultrasonic diathermy treatment device intended for home use. This code identifies durable therapeutic equipment used by patients outside clinical settings to deliver low-frequency ultrasonic diathermy for ongoing symptom management and rehabilitation. The code is significant nationally as it defines billing and coverage pathways for home-based therapeutic devices that can affect access to non-pharmacologic pain and tissue-healing treatments.
Key payers considered in the national analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of payer coverage patterns, common modifier usage, and clinical context for device deployment in home settings. The publication summarizes reimbursement benchmarks where available, typical documentation and billing considerations tied to home durable medical equipment, and policy trends that influence payer coverage of therapeutic home devices.
This resource is designed for clinicians, billing professionals, and policy analysts seeking a concise reference on coding, payer coverage considerations, and the clinical role of home-use low frequency ultrasonic diathermy devices.
Billing Code Overview
HCPCS Level II code K1004 describes a low frequency ultrasonic diathermy treatment device for home use. The service type is durable medical equipment (therapeutic home medical device) intended to deliver low-frequency ultrasonic diathermy therapies outside of clinical settings. The typical site of service is the patient's home, where the device is used for ongoing therapeutic treatment under the direction of a clinician.
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Clinical & Coding Specifications
Clinical Context
A 64-year-old patient with chronic lateral epicondylitis and persistent forearm pain is discharged with a prescription for a low frequency ultrasonic diathermy treatment device for home use (K1004). The device is provided after an in-clinic evaluation by a physical medicine and rehabilitation physician who documents failure of conservative in-office therapies (home exercise program, manual therapy, and supervised physical therapy) and ongoing functional limitation. The clinical workflow: initial office visit with history, physical exam, and diagnosis; trial of in-office modalities; order and documentation for a durable medical equipment (DME) home-use ultrasonic diathermy device; completion of DME order form and supplier documentation; patient education on device use, safety precautions, and prescribed treatment parameters; delivery and setup by a DME supplier with return-to-provider follow-up to assess response and adjust the care plan. Typical duration of home use is specified in the order (for example, daily treatments for 4–6 weeks) with periodic clinical reassessment.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when documentation supports substantially greater work or resources for evaluation and device fitting beyond typical time. |