Prior Authorization Likely Required for Advanced KAFOs

Prior authorization likely required for advanced KAFO (L2006): Knee-ankle-foot devices with microprocessor control (HCPCS L2006) are listed as HCPCS codes not covered for indications in this CPB. Providers should obtain prior authorization when proposing an advanced/electronic KAFO (e.g., C-Brace) and document indication and justification because these devices are considered experimental/investigational for listed indications.

• Affected code: L2006 (Knee-ankle-foot device with microprocessor control)
• Reason: Listed as HCPCS not covered for indications in this CPB; considered experimental/investigational

Custom Orthosis Prior Authorization Considerations

Custom orthosis prior authorization considerations: Custom-fabricated and molded-to-patient-model orthoses require clear documentation of custom fabrication (materials and substantial fabrication steps) and an exact patient impression when a molded-to-patient model is used. Prior authorization is often required for custom orthoses to verify medical necessity and fabrication method.

• Document fabrication method: e.g., molded-to-patient model, plaster cast or CAD-CAM impression
• Include description of substantial work (cutting, bending, molding, sewing) and why prefabricated options are insufficient

When Prior Authorization Is Not Specified

Prior authorization not specified in excerpt: Some parts of this CPB do not state explicit payer-level prior authorization requirements. When prior authorization is not specified, providers must follow plan-specific administrative rules and check benefit plan details.

• If no prior authorization instruction is present in the CPB, verify with member plan or prior authorization portal before ordering
• Keep documentation in the record showing verification of plan requirements

Prior Authorization — General Reminder

Prior authorization: Providers should assume prior authorization may be required for devices or services that are experimental/investigational, custom fabricated, or listed as not covered in HCPCS tables. Obtain authorization and retain approval documentation in the medical record to avoid claim denials.

• Obtain prior authorization for experimental/innovative devices and custom-fabricated orthoses when indicated
• Retain written prior authorization/approval documentation with the patient chart

Prior Authorization and Administrative Resources

Prior authorization and administrative links: Providers should use the CPB’s administrative links (Clinical Policy Bulletin Notes, Review History, Definitions) and the payer’s prior authorization portals to confirm current prior authorization rules, codes, and submission requirements.

• Check Clinical Policy Bulletin Notes and Review History links for updates
• Use payer prior authorization portal or contact provider services for plan-specific rules

Not-Covered Code Alerts

Not-covered specific code note: Certain HCPCS codes are explicitly listed as not covered for indications in this CPB. Submit requests with clear medical necessity rationale and confirm coverage before ordering.

• Example not-covered code: L2006 (microprocessor-controlled KAFO) — listed as HCPCS not covered for CPB indications
• Also verify use of miscellaneous codes (e.g., L2999) which may be denied if used for excluded systems

Custom Fitting Requirement

Custom fitting requirement: Cast-braces, custom-fitted systems (e.g., Boston Ankle System), and molded-to-patient-model orthoses require proper impressions and orthotist involvement for fabrication and fine adjustment. Document orthotist credentials and fitting details.

• Document exact impression method (plaster cast or CAD-CAM) and date
• Document orthotist/prosthetist credentials (ABC, BOC, or state license) and that fine adjustments/fitting were performed

Absent Provider Action Items

None specified in this excerpt: In places where the CPB provides no provider action items, there may still be plan-level administrative requirements. When in doubt, contact the payer.

• Absence of a specified action in the CPB does not remove need to follow payer prior authorization or billing rules

No Explicit Prior Authorization in CPB

No explicit authorization or prior authorization: The CPB does not always include explicit authorization instructions. Providers must verify authorization requirements through the payer’s administrative resources prior to providing devices.

• Verify prior authorization requirements when CPB is silent
• Document verification steps in the chart

Fabrication Documentation

Fabrication documentation: Clearly document whether the orthosis is prefabricated, pre-fabricated but custom-fitted, or custom-fabricated. For custom devices, include materials, fabrication steps, and reason prefabricated options are inadequate.

• State whether device is: prefabricated, prefabricated/custom-fitted, or custom-fabricated
• Include fabrication details (materials, molding, trimming, assembly) and justification for custom fabrication

Custom Device Fitting Documentation

Custom device fitting documentation: For custom-fitted systems (e.g., Boston Ankle System) document the exact impression, orthotist involvement, date of fitting, and any fine adjustments. Ensure fitting is not performed during acute swollen phase when applicable.

• Record date and method of impression (plaster cast, CAD-CAM) and who performed it
• Document orthotist adjustments and final fitting notes; avoid fitting during acute swelling when noted

Background Evidence Recommendations

Background evidence reporting: When submitting requests for custom or experimental orthoses, include supporting evidence from the literature when available (e.g., systematic reviews, RCTs) especially for indications with limited or evolving evidence.

• Include relevant study citations or summaries for support (e.g., rheumatoid arthritis orthosis evidence, AFO post-stroke reviews)
• Note limitations of evidence and rationale for anticipated benefit in the individual patient

Clinical Documentation Recommendations

Clinical documentation recommendations: Provide detailed physical examination findings (e.g., passive ROM with goniometer for plantar flexion contracture), functional limitations, therapy program details, and prior conservative treatments to support medical necessity.

• Measure and document pre-treatment passive range of motion with a goniometer for contractures
• Describe how the orthosis will improve MRADLs and document therapist/caregiver stretching program when applicable
• Include functional assessments such as gait speed, ambulation status, and specific activity limitations

Provider Responsibility Reminder

Providers are responsible for medical advice and treatment: Treating providers are solely responsible for member medical care decisions and must ensure documentation supports medical necessity. The CPB does not replace clinical judgment or plan-specific benefit rules.

• Maintain complete medical record supporting the orthosis prescription and fitting
• Use CPB guidance alongside clinical judgment and plan benefit terms

Taping/Wrapping Coverage Limitation

Taping/wrapping coverage limitation: Aetna covers taping or wrapping when applied in-office by a healthcare provider but does not cover take-home tape or wrapping because it does not meet DME durability requirements.

• Covered: Tape/wrapping applied by clinician in office
• Not covered: Take-home tape or wrapping supplies

Preference for Off-the-Shelf Devices When Appropriate

Use of off-the-shelf devices before custom: Prefabricated or less complex off-the-shelf options (lace-up braces, air-stirrups, prefabricated AFOs) should be considered first when clinically appropriate; document why they are insufficient if a custom device is requested.

• Document trial and failure or inadequacy of prefabricated options before approving custom fabrication
• Examples of prefabricated options: lace-up braces, air-stirrups, prefabricated static/dynamic AFOs

Step Therapy and Prior Conservative Care

No step therapy mandates described: This CPB does not impose explicit step therapy mandates; however, documentation of prior conservative measures (e.g., bracing, physical therapy) strengthens the medical necessity case.

• CPB does not list step therapy requirements as utilization controls
• Document prior conservative treatments and response

Device Selection Guidance

Device selection guidance: Device choice (AFO vs FES, prefabricated vs custom, KAFO vs AFO) should be individualized based on clinical response and documented functional benefits; when multiple options are reasonable, justify the selected device.

• Document rationale for selecting a specific device and expected functional improvements
• Reassess device effectiveness over time and document outcomes

Claim Denial Risk — Billing Impact

Claim denial risk: Claims may be denied if documentation is insufficient, the device is experimental/not covered, or billing uses inappropriate codes. Verify coverage, use correct HCPCS codes, and ensure medical records support billing.

• Avoid using miscellaneous codes without documentation of coverage rationale
• Retain prior authorization and clinical documentation to reduce denial risk