ModifiedUnitedHealthcarePolicy N/A

Mechanical Stretching Devices Ne Cs

This UnitedHealthcare medical policy discusses mechanical stretching devices (dynamic splints, static progressive stretch devices) used to treat joint contractures/arthrofibrosis of the extremities, provides references and documentation requirements, and records policy revision history and instructions for use. This part of the document contains references, policy history revisions (documentation requirements), and general instructions.

Policy Summary

PayerUnitedHealthcare

PolicyMechanical Stretching Devices Ne Cs

Policy CodePolicy N/A

Change TypeDocumentation requirements added/clarified; references updated

Effective DateDecember 1, 2025

Next Review DateN/A

Key ActionProvide legible medical records that fully support medical necessity, including relevant medical history, physical exam, and pertinent diagnostic tests or procedures; records must be made available upon request.

SourceLink

POLICY UPDATE CHANGES

Added language clarifying that benefit coverage is determined by federal, state, or contractual requirements and that medical records documentation may be required to assess clinical criteria and does not guarantee coverage.

Documentation supporting medical necessity should be legible and maintained in the patient's medical record and made available upon request.

Updated Clinical Evidence and References sections to reflect the most current information.

1Material Change

>=20Cited Studies/References

Coverage Summary

This UnitedHealthcare medical policy addresses Mechanical Stretching Devices for Joint Contractures — including dynamic splints, low-load prolonged-duration stretch (LLPS) devices, static progressive stretch (SPS) devices, and patient-actuated serial stretch (PASS) devices — used to prevent or treat joint contractures and restore or maintain joint range of motion in the extremities. The scope includes references and evidence summaries for conditions such as adhesive capsulitis, knee arthrofibrosis, tendon-repair rehabilitation, hallux valgus, cerebral palsy contractures, and post-operative stiffness, and provides documentation and operational instructions for use.

Coverage stance for devices described in this section is mixed: some LLPS/dynamic splinting indications are supported by evidence and considered proven when used as an adjunct to therapy, while SPS and PASS devices have insufficient or inconsistent evidence for many indications. Has material change: true — documentation requirements were materially changed; see the Policy History/Revision Information for details of changes and the updated list of required documentation.

Medical Necessity / Documentation Criteria

Documentation supporting medical necessity

Medical records documentation may be required to assess whether the member meets the clinical criteria for coverage but does not guarantee coverage of the service requested

Benefit coverage is determined by federal, state, or contractual requirements and applicable laws which may require coverage for a specific service

Policy states that plan documents govern when conflict exists

The patient's medical record must contain documentation that fully supports the medical necessity for the requested services

Documentation includes but is not limited to relevant medical history, physical examination, and results of pertinent diagnostic tests or procedures

Documentation supporting medical necessity should be legible, maintained in the patient's medical record, and must be made available upon request

Provider Actions & Documentation Requirements

Documentation Required

Medical record documentation required for reviews

Provide legible medical records that fully support medical necessity. Records should demonstrate the clinical rationale for the requested mechanical stretching device and include documentation such as relevant medical history, findings from the physical examination, and results of pertinent diagnostic tests or procedures. These records must be maintained in the patient’s medical record and made available upon request to support reviews of medical necessity.

Relevant medical history (e.g., onset, prior treatments, response to therapy)
Physical examination findings (e.g., measured range of motion, contracture severity)
Pertinent diagnostic test results or procedure reports (e.g., imaging, nerve studies, operative notes)

Note

Coverage Determinations Governed by Plan/Legal Requirements

Benefit coverage is governed by federal, state, or contractual requirements and applicable laws; documentation in the medical record may be required to determine whether clinical criteria are met but does not guarantee that a service will be covered. When conflicts exist, plan-specific federal, state, or contractual terms control coverage determinations.

Background & Clinical Evidence

The background literature cited in this policy includes systematic reviews, randomized controlled trials, observational studies, and case series evaluating mechanical stretching devices (dynamic splints/LLPS, SPS, and PASS) across multiple indications (e.g., adhesive capsulitis, knee arthrofibrosis, finger tendon-repair rehabilitation, hallux valgus, cerebral palsy contractures). The evidence base ranges from high-quality RCTs for specific applications to low- or mixed-quality studies and systematic reviews that highlight limitations, heterogeneity, and the need for further research.

This policy emphasizes that medical necessity and coverage determinations depend on documentation and applicable federal, state, or contractual requirements: medical records must fully support the medical necessity for requested services (including relevant history, physical exam, and diagnostic results), be legible, maintained in the patient record, and made available upon request. In cases of conflict, plan documents and governing legal/contractual requirements take precedence.

Evidence summary

Systematic reviews and randomized trials citedMultiple peer-reviewed studies and systematic reviews from 1942-2024 listed supporting varying levels of evidence for mechanical stretching devices

Revision History

12/01/2025addedLatest

Specifies that documentation must fully support medical necessity and lists examples of required documentation; supporting information and clinical evidence and references updated; previous policy archived (CS077NE.Q).

12/01/2025clarifiedLatest

Operational clarification of documentation expectations for reviews.

12/01/2025revised