HCPCS Code L3020: Foot, Insert, Removable, Molded to Patient Model, Longitudinal Arch Support, Each

HCPCS L3020 covers custom foot inserts molded to patient model with longitudinal arch support, foot orthotics, and orthotic shoes.

Use Code

## **What is HCPCS code L3020?** HCPCS code L3020 describes a removable foot insert molded to a patient model that provides longitudinal and metatarsal support. It is a custom device made from a cast, impression, or scan of the patient’s foot, distinct from prefabricated or trimmed inserts, and designed to help maintain proper functioning of the lower extremity by improving alignment and stability. Medicare does not cover L3020 as a standalone item. Coverage applies only when the insert is used with a covered leg brace that is permanently attached to the shoe. In this setting, the insert works to control foot motion and support gait. If billed separately or for general orthopedic use, the claim will be denied. Documentation must show medical necessity, describe the molding process, and explain why a custom insert is required over prefabricated alternatives. L3020 should not be confused with other codes. L3000 is for molded inserts providing arch support only, L3030 describes molded inserts without detail, and L3060–L3090 cover prefabricated inserts. Other shoe modifications, including shoe transfers, sole replacements, heel repairs, or adjustments made to create a matching shoe, fall under the L4200–L4280 range and should not be billed as L3020. In short, L3020 is for custom molded foot inserts with longitudinal and metatarsal support, but reimbursement depends on strict documentation and, for Medicare, attachment to a covered leg brace.

## **HCPCS code L3020 documentation requirements** HCPCS Code L3020 documentation requirements generally include the following components as per CMS guidelines for orthopedic footwear, foot orthoses, and custom molded shoes: ### **Standard Written Order (SWO)** A Standard Written Order is required before billing L3020. The SWO must include the beneficiary’s name or Medicare Beneficiary Identifier, the order date, a description of the item such as “HCPCS Code L3020, removable foot insert molded to patient model,” the quantity to be dispensed, and the treating practitioner’s name, NPI, and signature. The order must be dated on or after a documented visit with the prescribing practitioner. ### **Medical record documentation** The patient’s medical record should establish medical necessity. This includes documentation that the patient is ambulatory and requires a custom molded insert rather than a prefabricated device. The record should describe the molding method used, such as a cast, impression, or scan, and explain why the insert is essential for treatment. ### **Proof of delivery** Delivery documentation must confirm that the device was dispensed. It should list the beneficiary’s name, delivery address, item description, quantity delivered, the date of delivery, and the signature of the person who received the device. ### **Medicare coverage and limitations** Medicare generally does not cover L3020 when billed as a standalone insert. Coverage applies only if the insert is used with a covered leg brace that is permanently attached to the shoe, and the beneficiary meets criteria for brace coverage, including being ambulatory. If billed outside of this context, claims will be denied. ### **Modifiers** Claims for L3020 must use RT or LT to indicate the foot treated, and bilateral inserts must be billed on two separate lines with one unit each. The KX modifier should not be used for L3020, since Medicare does not recognize this code as covered outside of specific brace policies. EY may be appended if a required order is missing, but this will result in denial until documentation is corrected.

## **HCPCS Code L3020 billing requirements** HCPCS Code L3020 billing requirements entail several key points: Units of service: Bill per insert. Use one unit for a single foot; if billing for a pair, submit two separate lines, each with one unit. - **Modifiers**: Append RT or LT to indicate laterality. Do not combine both on one line with two units. - **Medicare coverage**: Denied when billed as a standalone item. Covered only if the insert is used with a covered leg brace that is permanently attached to the shoe. Payment follows the brace coverage rules. - **Commercial insurers**: Some may cover custom inserts without the Medicare brace restriction, but typically limit replacement frequency (often one pair per year). - **Prior authorization**: May be required by certain payers before dispensing. - **Diagnosis linkage**: Claims must include diagnosis codes that support medical necessity. - **Exclusions**: Do not use L3020 for shoe modifications, transfers, or repairs (such as sole or heel replacements), which have their own HCPCS codes.

## **Other relevant codes** - **L3000**: Foot, insert, removable, molded to patient model, 'UCB' type, Berkeley Shell, each - **L3010**: Foot, insert, removable, molded to patient model, longitudinal arch support, each - **L3030**: Foot, insert, removable, formed to patient foot, each - **L3031**: Foot, insert/plate, removable, addition to lower extremity orthosis, high strength, lightweight material, all hybrid lamination/prepreg composite, each