Coding & claim submission requirements — RT/LT modifiers and bilateral billing

Use RT and/or LT modifiers on all footwear HCPCS codes. When billing bilateral items with the same code on the same date of service, submit both items on the same claim line using the RT/LT modifiers and 2 units of service. Claims billed without RT and/or LT modifiers will be rejected as incorrect coding. Ensure bilateral billing follows this guidance to avoid claim rejection.

• Apply RT or LT modifier to each line for single-side items.
• For bilateral same-code items on same date, bill one claim line with RT and LT modifiers and quantity = 2.

Case-by-case coverage review for listed HCPCS L-codes

Coverage for the listed HCPCS L-codes is determined on a case-by-case basis per the member's contract and medical necessity; providers should anticipate individualized review. Northwood follows applicable CMS NCDs and LCDs when evaluating DMEPOS items included in this policy.

• Expect case-by-case review for L3000-L3265, L3300-L3649 and L4631 and similar HCPCS L-codes.
• Final benefit depends on the member's contract and documented medical necessity; CMS NCDs/LCDs are applied where relevant.

Authorization and coding clarification for CROW orthosis (L4631)

Coding clarification: HCPCS code L4631 describes a CROW (Charcot restraint orthotic walker) — a custom fabricated ankle-foot orthosis with specified features; when requesting authorization follow the updated coding guidance and recognize that L4631 includes all additions (straps and closures) and no additional codes may be billed with L4631.

• L4631 includes all additions (straps and closures) and is billed as a single code.
• Do not bill additional shoe/closure addition codes with L4631.

Conservative therapy prerequisite — document failed conservative care

Orthotics should not be considered first‑line therapy; the member must have failed an appropriate course of conservative treatment (for example, physical therapy, injections, strapping, or anti‑inflammatory medications) before orthotics will be considered medically necessary.

• Document failure to respond to appropriate conservative measures prior to authorization.
• Orthotics are not medically necessary when the foot condition does not cause symptoms.

Documentation for custom fabrication — justify why OTS/prefab won’t suffice

For custom fabricated foot orthotics, the medical record must document why prefabricated (custom-fitted) or prefabricated off‑the‑shelf foot orthotics cannot meet the member's needs.

• Include specific rationale comparing member’s needs to available prefabricated options.
• Retain documentation supporting the medical necessity of custom fabrication.

Ordering and conservative therapy documentation — practitioner order and symptom history required

Orthopedic footwear must be ordered by the member's treating practitioner and the record must document the member's symptoms and failure to respond to an appropriate course of conservative treatment when submitting requests or claims.

• Treating practitioner must place the order (policy updated to use 'practitioner').
• Document presenting symptoms and prior conservative treatments tried and failed.

Benefit determination and documentation — contract and CMS references govern final coverage

Final benefit determinations are based on the member's contract language and documented medical necessity; Northwood uses CMS NCDs and LCDs where applicable when evaluating coverage for DMEPOS items.

• A determination that a product is reasonable and necessary does not itself constitute coverage; the member’s contract governs coverage.
• If there is a conflict between medical policy and contract language, the contract prevails.

Claim documentation note — include replacement-specific information on claims

When submitting claims for replacement orthopedic footwear include the specific information referenced in policy history entries (replacement-specific documentation requirements were added to the policy history); ensure claim submissions meet those documented requirements.

• Follow the explicit documentation requirements added in policy history for replacement claims.
• Maintain records showing justification for replacement as specified in the policy.

Missing RT/LT modifiers — rejection risk for footwear HCPCS codes

Claims for footwear HCPCS codes billed without RT and/or LT modifiers will be rejected as incorrect coding; ensure RT/LT modifiers are present on each applicable claim line to avoid denial.

• Verify RT/LT modifiers before submission; missing modifiers trigger claim rejection.
• This applies to all footwear HCPCS codes referenced in the policy.

Contract and medical necessity — case-by-case, contract-governed coverage

Coverage determinations are made case‑by‑case and are subject to the terms, conditions, limitations, and exclusions of the member's contract; failure to meet contract or medical necessity requirements can trigger denial.

• A finding of reasonable and necessary does not automatically equal coverage—contract language controls.
• Providers should document medical necessity in accordance with contract and policy criteria.

Criteria-based denial risk — missing required criteria leads to non-coverage

If the required coverage criteria groups (Criteria I and II for adults or Criteria I and III for pediatrics, plus Criteria IV and V) are not met, the item is not reasonable and necessary and claims will be denied.

• Ensure documentation demonstrates meeting Criteria I and the appropriate age‑group diagnostic criteria, plus Criteria IV (symptoms) and V (failed conservative therapy).
• Absence of required criteria-based documentation is a basis for non-coverage.

Non-covered HCPCS code (K1015) — billing risk

HCPCS code K1015 was added to the policy's non‑covered list in history (later noted removed per CMS deletion effective 1/1/24); billing a non‑covered code risks denial — verify current code status before submission.

• Do not bill K1015 as covered without confirming current CMS/code status due to policy history changes.
• Check for CMS deletions or policy updates affecting code coverage.

Authorization and coding checklist — modifiers, documentation, L4631 note

Follow the policy's coding guidance and documentation requirements when requesting authorization or submitting claims for the listed HCPCS codes; this block consolidates prior authorization notes and coding reminders from the policy.

• Use RT/LT modifiers and correct units for bilateral same-code billing.
• Document medical necessity and conservative therapy failure per Criteria IV and V.
• Apply L4631 coding rules for CROW orthosis when applicable.

Case-by-case review reminder — apply contract, medical necessity, and CMS guidance

Follow the policy's case‑by‑case and contract‑driven approach when seeking prior authorization or coverage review; Northwood will apply CMS NCDs/LCDs where applicable and individual HCPCS L-codes will be evaluated against documented medical necessity.

• Expect individualized review for L‑codes; include contract-relevant documentation.
• Provide clinical rationale tying the requested code to policy criteria and CMS guidance where relevant.