CurrentmhnPolicy CP.MP.144

Mechanical Stretching Devices for Joint Stiffness and Contracture

Defines medical necessity, coding, and coverage stance for mechanical stretching devices (primarily low‑load prolonged‑duration stretch devices) used to treat or prevent joint contractures; applies to Centene-affiliated health plans and providers.

Policy Summary

Payermhn

PolicyMechanical Stretching Devices for Joint Stiffness and Contracture

Policy CodePolicy CP.MP.144

Change TypeNo material change

Effective Date

Next Review Date

Key ActionObtain prior authorization and document failed conservative therapy, functional limitation, device rental period requested, and supporting HCPCS code.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

HCPCS 20+HCPCS codes referenced

Toe, knee, elbow, wrist, ankle, fingerJoints covered

Initial 4w + subsequent 4wAuthorized rental durations

Strongest for knee/elbow/wrist/fingerEvidence summary

CentenePolicy owner

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Coverage Criteria — Mechanical Stretching Devices (LLPS)

LLPS device (dynamic stretch) — Medical necessity

Covered when ALL of the following are met:

Indication timing and symptoms: Requested in the subacute period (≥ three weeks and ≤ four months after injury/operation) with signs and symptoms of persistent joint stiffness or contracture OR in the acute post-operative period for members who have undergone additional surgery to improve range of motion of the previously affected joint.timing as stated

See I.A.1 and I.A.2

Functional limitation and prior treatment: Limited range of motion poses a meaningful functional limitation determined by the physician or therapist AND has not responded to other interventions (including physical therapy).prior conservative therapy failed

I.A.1.a-b

Adjunctive treatment: Device is provided with adjunctive treatment (e.g., home exercise program, physical therapy).adjunctive therapy documented

I.A.1.c

Rental authorization: Request is for rental: initial four weeks OR a subsequent four-week period where improvement was noted upon reevaluation after the prior four-week period.rental period and documented improvement

I.B.1-2

Devices and indications not supported / Insufficient evidence

Not supported due to insufficient evidence:

Not supported device types or indications: LLPS for indications not listed in section I (including other joints such as the shoulder and other foot joints); Bi-directional static progressive stretch (SPS) devices; Patient-actuated serial stretch (PASS) devices.

Section II: current research does not support these uses

The following HCPCS codes are identified in the policy as not supporting coverage consideration and are excluded under this policy: E1399, E1801, E1806, E1811, E1816, E1818, E1831, E1832, E1840, and E1841. These codes represent miscellaneous durable medical equipment, static progressive stretch devices for multiple joints, and shoulder devices that the policy specifies do not support coverage.

Coverage determinations under this clinical policy are subject to the member’s plan documents and any applicable legal or regulatory requirements. Benefits are governed by the terms, exclusions, and limitations of the member’s coverage documents (for example, evidence of coverage, certificate of coverage, policy, or contract of insurance) and Health Plan-level administrative policies and procedures; state Medicaid provisions and Medicare NCDs/LCDs take precedence where applicable.

The policy states that the current research does not support the use of bi-directional static progressive stretch (SPS) devices or patient-actuated serial stretch (PASS) devices. These device types are listed as not supported due to insufficient evidence, and use of SPS/PASS is therefore not covered under this policy.

Coding — HCPCS and Billing Codes

Covered HCPCS Codes / Codes that support coverage criteriaHCPCSCovered

E1800	Dynamic adjustable elbow extension/flexion device, includes soft interface material
E1802	Dynamic adjustable forearm pronation/supination device, includes soft interface material
E1803	Dynamic adjustable elbow extension only device, includes soft interface material
E1804	Dynamic adjustable elbow flexion only device, includes soft interface material
E1805	Dynamic adjustable wrist extension/flexion device, includes soft interface material
E1807	Dynamic adjustable wrist extension only device, includes soft interface material
E1808	Dynamic adjustable wrist flexion only device, includes soft interface material
E1810	Dynamic adjustable knee extension/flexion device, includes soft interface material
E1812	Dynamic knee, extension/flexion device with active resistance control
E1813	Dynamic adjustable knee extension only device, includes soft interface material

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HCPCS Codes that do not support coverage criteria (SPS/PASS/other/not supported)HCPCSNot Covered

E1399	Durable medical equipment, miscellaneous
E1801	Static progressive stretch elbow device, extension and/or flexion, with or without range of motion adjustment, includes all components and accessories
E1806	Static progressive stretch wrist device, flexion and/or extension, with or without range of motion adjustment, includes all components and accessories
E1811	Static progressive stretch knee device, extension and/or flexion, with or without range of motion adjustment, includes all components and accessories
E1816	Static progressive stretch ankle device, flexion and/or extension, with or without range of motion adjustment, includes all components and accessories
E1818	Static progressive stretch forearm pronation/supination device, with or without range of motion adjustment, includes all components and accessories
E1831	Static progressive stretch toe device, extension and/or flexion, with or without range of motion adjustment, includes all components and accessories
E1832	Static progressive stretch finger device, extension and/or flexion, with or without range of motion adjustment, includes all components and accessories
E1840	Dynamic adjustable shoulder flexion/abduction/rotation device, includes soft interface material
E1841	Static progressive stretch shoulder device, with or without range of motion adjustment, includes all components and accessories

inv-08: Subacute timing window

Subacute timing window≥ 3 weeks and ≤ 4 months after injury or operation

Applicable indications in subacute windowMembers with signs and symptoms of persistent joint stiffness or contracture

Functional limitation requirementLimited range of motion must pose a meaningful functional limitation determined by physician or therapist

Provider Actions — Authorization, Documentation, and Denials

Prior Authorization

Prior Authorization Required

Prior authorization is required for rental of covered HCPCS codes supporting dynamic/LLPS devices. Requests should specify the HCPCS code, indication, and rental period (initial four weeks; subsequent four-week periods require documented improvement on reevaluation).

Prior authorization required for covered HCPCS codes: E1800, E1802, E1803, E1804, E1805, E1807, E1808, E1810, E1812, E1813, E1814, E1815, E1820, E1822, E1823, E1825, E1826, E1827, E1828, E1829

Documentation Required

Required Documentation for Medical Necessity

Document the clinical rationale demonstrating medical necessity. Include history, physical exam findings, and therapy progress notes showing persistent joint stiffness/contracture and functional limitation. For post-operative or subacute injuries, document timing relative to injury/operation.

Clinical notes showing limited range of motion that causes meaningful functional limitation
Evidence that other interventions (including physical therapy) failed to produce adequate improvement
Documentation of adjunctive treatments provided (e.g., home exercise program, PT)
If post-operative: date of surgery and relation to requested device (≥3 weeks and ≤4 months for subacute use)

Documentation Required

Failure of Conservative Therapy Required

Approval is contingent on documented failure of conservative therapy prior to rental. Conservative measures must be tried and documented (e.g., supervised physical therapy, home exercise programs).

Documentation of prior conservative treatments and dates (e.g., number of PT sessions)
Statement that conservative therapies did not achieve adequate improvement
For members undergoing additional surgery to improve ROM, clarify acute post-operative indication if applicable

Denial Risk

Denial Triggers — Insufficient Documentation or Unsupported Indications

Requests lacking sufficient documentation or submitted for indications not supported by policy are at high risk for denial. Unsupported indications include any use not meeting the policy’s listed indications (e.g., indications outside toe, knee, elbow, wrist, ankle, or finger or devices listed as not supported such as SPS/PASS).

Denial triggers: insufficient clinical documentation of functional limitation or prior conservative therapy
Denial triggers: request for devices or indications listed as not supported (including bi-directional SPS and PASS devices)
Denial triggers: missing rental-period justification or lack of documented improvement after prior four-week rental period

Definitions — Device Types and Terms

inv-18: LLPS (low-load prolonged-duration stretch) device / dynamic splinting

DefinitionDevices that permit resisted active and passive motion (elastic traction) within a limited range and maintain a set level of tension via incorporated springs.

Common joints addressedUsed for knee, ankle, toe, shoulder, elbow, wrist, or finger stiffness/post-operative care

Use context per policyCovered for toe, knee, elbow, wrist, ankle, or finger when medical necessity criteria are met (see policy I).

inv-19: SPS (static progressive stretch) device

DefinitionDevices that hold the joint in a set position but allow manual modification of the joint angle and may allow active motion without resistance (inelastic traction).

Examples noted in codingMultiple static progressive stretch HCPCS codes are listed as not supporting coverage (see coding module).

Policy stanceBi-directional SPS devices are not supported by current research for indications outside those specified; SPS devices generally not covered under section II.B.

inv-20: PASS (patient-actuated serial stretch) device

DefinitionDevices permitting resisted active and passive motion within a limited range utilizing patient-adjustable pneumatic or hydraulic systems; require custom fitting.

Mechanism detailPneumatic systems used for extension; hydraulic systems used for flexion (patient-adjustable).

Policy stancePASS devices are not supported by current research and are listed as not covered in section II.C.

inv-21: Dynamic splinting (literature description)

Literature descriptionReferenced literature describes devices applying a low-load, prolonged stretch that allow controlled motion and stretching over time (dynamic orthoses).

Evidence summaryBest evidence for dynamic splinting (LLPS) is at the knee, elbow, wrist, and following extensor tendon injuries of the finger; outcomes vary by study and condition.

Representative studiesStudies cited include randomized trials and systematic reviews evaluating dynamic splinting for elbow, knee, wrist, and hand conditions (e.g., Griffin et al.; Veltman et al.; Willis et al.).

inv-22: Static progressive splinting (literature description)

Literature descriptionReferenced literature describes devices that provide incremental, adjustable static stretch (e.g., turnbuckle orthosis, Joint Active System) to progressively improve joint range of motion.

Evidence summarySPS has supporting studies for use at the elbow; however, bi-directional SPS devices and many SPS indications are not supported by current research per policy II.B.

Representative studiesCited works include prospective studies and systematic reviews comparing static progressive versus dynamic splinting for elbow stiffness (e.g., Bhat et al.; Veltman et al.).

OpenPayer

Mechanical Stretching Devices for Joint Stiffness and Contracture

Coverage Criteria — Mechanical Stretching Devices (LLPS)

Coding — HCPCS and Billing Codes

Provider Actions — Authorization, Documentation, and Denials

Background — Joint Contracture and Device Context

Definitions — Device Types and Terms