Osteogenic Stimulation
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Defines medical necessity criteria, coding, and clinical background for noninvasive and invasive electrical osteogenic stimulators and low-intensity pulsed ultrasound devices used to enhance bone healing for members covered by the payer.
No material clinical or coverage changes in this revision.
Coverage Criteria for Osteogenic Stimulation
Noninvasive electrical osteogenesis stimulators — Covered when ANY of the following apply
Noninvasive electrical osteogenesis stimulators are medically necessary when any of the following apply:
AND all of: bone not infected; gap between bone fragments < 1 cm; bone stable at both ends with appropriate fracture care and immobilization; serial imaging confirmed healing ceased for >=3 months prior to treatment with the noninvasive electrical bone growth stimulator. Serial imaging must include a minimum of two sets of images, each including multiple views of the fracture site, separated by a minimum of 90 days.
Invasive electrical osteogenesis stimulators — Covered when ANY of the following apply
Invasive electrical osteogenesis stimulators are medically necessary when any of the following apply:
Ultrasonic osteogenesis stimulators — Covered when ANY of the following apply
Ultrasonic osteogenesis stimulators (LIPUS) are medically necessary when any of the following apply:
Intended as adjunctive therapy to standard fracture stabilization rather than first-line standalone therapy.
Ultrasonic (LIPUS) osteogenesis stimulators have explicit device- and indication-level exclusions. They are not medically necessary when used concurrently with other noninvasive osteogenic stimulators, for avascular necrosis of the femoral head, for stress fractures, for fractures with a gap that exceeds 1 cm, for fresh fractures located outside the specified anatomic sites (distal radius, tibial diaphysis, scaphoid, or Jones fracture of the 5th metatarsal), for fresh tibial diaphyseal or tibial/fibular fractures treated with closed reduction and intramedullary nailing when no risk factors for poor healing are present, for preoperative use when surgical fixation is required, and for tibial stress fractures. Additionally, osteogenic devices (including ultrasonic stimulators) are not medically necessary for nonunion fractures of the skull, vertebrae, or those related to tumor/malignancy.
Coverage determinations for osteogenic stimulation are governed by the member's coverage documents and applicable legal requirements. This policy is a guide to medical necessity and does not constitute a guarantee of payment. Coverage and administration of benefits remain subject to the member's evidence of coverage, certificate of coverage, contract terms, and any relevant state Medicaid or federal Medicare requirements; where discrepancies exist, state or federal mandates take precedence.
The scope of covered ultrasonic osteogenesis stimulators (LIPUS) is limited to specific clinical scenarios: adjunctive use for fresh, closed fractures at high risk of delayed healing or nonunion when the fracture is ≤7 days old and meets the listed risk/location criteria (for example, distal radius, scaphoid, Jones fracture, or selected tibial diaphyseal fractures treated nonoperatively), and for nonunion of bones other than the skull or vertebrae when imaging and clinical criteria are met (minimum two sets of images separated by ≥90 days and fracture gap <1 cm). Device-level limits align with the exclusions above — LIPUS is not indicated for use outside the specified anatomic sites, for fractures with gap >1 cm, preoperative use when surgery is required, tibial stress fractures, or concurrent use with other noninvasive osteogenic stimulators.
Coding and Supplies
| A4559 | Coupling gel or paste, for use with ultrasound device, per oz. |
Provider Requirements, Prior Authorization, and Documentation
Prior Authorization Required
Prior authorization is required for listed procedure and device codes before initiation of osteogenic stimulation therapy. Providers must obtain authorization through the Health Plan's standard prior authorization process; authorization does not guarantee payment and is subject to member benefits, exclusions, and limitations.
Health Plan May Require Adherence to Policy
The Health Plan may require adherence to this clinical policy when reviewing requests for osteogenic stimulation. Providers should submit complete clinical documentation to support medical necessity as outlined in the policy.
Use Sequence for LIPUS
Low Intensity Pulsed Ultrasound (LIPUS) devices are prescribed for at-home daily use for approximately 20 minutes once daily as an adjunct to standard fracture stabilization (e.g., closed reduction and cast immobilization). Ensure the prescription and treatment plan document device type, daily duration, and intended treatment course.
- Typical prescription: 20 minutes once daily until radiographic and clinical healing.
- Document that LIPUS is being used in conjunction with appropriate fracture stabilization.
Imaging Documentation for Nonunion
Providers must supply serial imaging to document nonunion prior to initiation of osteogenic stimulation. Serial imaging requires at least two sets of images, each including multiple views of the fracture site, separated by a minimum of 90 days, demonstrating that fracture healing has ceased for three or more months (for noninvasive electrical stimulators) or appropriate intervals per device-specific criteria.
- Minimum: two imaging sets with multiple views, separated by >= 90 days.
- Imaging should demonstrate lack of progression of healing for the required timeframe (e.g., ≥3 months for noninvasive electrical stimulators).
Clinical Documentation Requirements for Nonunion
Clinical documentation must confirm key nonunion and patient-status criteria before approval. Providers should document absence of infection, fracture gap measurement, stability of fixation, prior treatments, and relevant comorbidities or risk factors.
- Confirm bone is not infected.
- Document that the two bone fragments are separated by less than 1 cm.
- Document stability at both ends via appropriate fracture care/immobilization or fixation.
- Provide history of prior surgery or treatments and time elapsed (e.g., ≥90 days for noninvasive nonunion).
- List risk factors (e.g., alcoholism, chemotherapy, diabetes, obesity, osteoporosis, renal disease, tobacco or steroid use) if invoking 'risk of delayed or nonunion' rationale.
Medical Necessity Documentation
Use professional judgment when submitting requests. This policy is a guide to medical necessity determinations but does not guarantee payment. Decisions remain subject to member-specific benefits, coverage terms, exclusions, and limitations.
- Complete clinical records, imaging, and justification should accompany PA requests.
- Authorization decisions are based on clinical policy plus plan benefits and may require peer review.
Triggers for Denial (Ultrasonic and Device-Level Exclusions)
Triggers for denial include use of ultrasonic stimulators concurrently with other noninvasive osteogenic stimulators, device- or indication-level exclusions, and indications explicitly listed as not medically necessary. Verify device type and indication against policy exclusions before requesting coverage.
- Ultrasonic stimulators used with other noninvasive osteogenic stimulators — not medically necessary.
- Ultrasonic stimulators for avascular necrosis of the femoral head, stress fractures, or tibial stress fractures — not medically necessary.
- Ultrasonic stimulators for fresh fractures in locations other than distal radius, tibial diaphysis, scaphoid, or Jones (5th metatarsal) — not medically necessary.
- Use of ultrasonic stimulators when the fracture gap exceeds 1 cm — not medically necessary.
- Osteogenic devices are not medically necessary for nonunion fractures of the skull, vertebrae, or tumor-related fractures.
- Preoperative use of ultrasonic stimulators for fractures requiring surgical intervention or fixation — not medically necessary.
- Claims for devices excluded by member benefit plan (e.g., cosmetic or investigational exclusions) may be denied.
Denial Triggers Tied to Benefits/Exclusions
Denials may also arise from benefit-level exclusions, member-specific limitations, or lack of required documentation. Providers should verify member coverage and exclusions and ensure submitted information aligns with coverage terms.
- Coverage is subject to evidence of coverage/certificate of benefits; PA or medical necessity approval does not override contractual exclusions or limitations.
- If a device or indication is labeled 'not medically necessary' in this policy, benefit-level denial is likely unless an exception applies.
Clinical Background
Fracture healing is a complex biologic process influenced by vascular supply, mechanical stability, the distance between bone ends, presence of infection, bone loss, nutrition, osteoporosis, and metabolic disorders. Approximately 5–10% of fractures demonstrate delayed or impaired healing. Diagnosis of nonunion is based on clinical findings (persistent motion, pain, tenderness) and imaging; management emphasizes restoration of stability (casting or internal/external fixation), consideration of bone grafting, and, when appropriate, adjunctive methods to induce osteogenesis such as electrical stimulation or low-intensity pulsed ultrasound (LIPUS).
Definitions and Device Types
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