HCPCS Code L2820: Addition to Lower Extremity Orthosis

Learn about the HCPCS code L2820 for "addition to lower extremity orthosis—soft interface for molded plastic, below knee section."

Use Code

## **What is the HCPCS code L2820 for?** The HCPCS code L2820 is meant to designate a soft interface material added to the lower extremity (below-knee) section of a lower extremity orthosis (a kind of durable medical equipment). This typically involves integrating essential cushioning materials such as foam, leather, or similar substances. These materials will improve patient comfort by reducing pressure points and enhancing the fit where rigid plastic rests against the skin. This is often provided to patients with the following problems: - Lower limb weakness - Lower limb paralysis - Orthopedic deformities (like having a deformed ankle joint) - Those recovering from surgery - Those who have skin irritations or pressure sores due to the lack of soft material interfaces for their orthoses Please note that this isn't a standalone orthosis. This is an accessory provided in addition to the base orthosis.

**Documentation requirements for L2820** Just like with any HCPCS code, before filing claims, make sure you familiarize yourself with all the necessary coding guidelines and policy articles, follow them to the letter, and ensure you have sufficient documentation to avoid claim rejections. Here are some examples of what you need: - The full name of the patient receiving the orthosis - The full name and credentials of the healthcare providers involved in assessing the patient, and the fitting and customization of the orthosis - The patient's medical history and any relevant clinical indications and diagnoses to justify the medical necessity of the orthosis - Documentation that supports the addition of this accessory, including the rationale behind it. The installation of this accessory must have been done by an accredited DMEPOS supplier. The documentation must align with the LCD (Ankle-Foot/Knee-Ankle-Foot Orthosis) requirements.

## **Billing requirements for L2820** Besides the documentation requirements above, make sure to have or take note of the following: - The relevant ICD codes related to the patient's condition - Standard written order (SWO) or written order prior to delivery (WOPD) and proof of delivery. include the interface addition, following the CGS DMEPOS Checklist for proper order and delivery documentation - Complete product information - Any necessary HCPCS codes for the brace being used (remember that L2820 is an accessory) - This cannot be billed as a standalone because it is an accessory - Please use appropriate modifiers based on the base orthosis being used

## **Other similar codes** For context and correct coding, here are comparable orthotic addition codes: - **L4631** - Ankle foot orthosis, walking boot type, varus/valgus correction, rocker bottom, anterior tibial shell, soft interface, custom arch support, plastic or other material, includes straps and closures, custom fabricated - **L1960** - Ankle foot orthosis, posterior solid ankle, plastic, custom fabricated - **L2280** - Addition to lower extremity, molded inner boot - **L2200** - Addition to lower extremity, limited ankle motion, each joint - **L1950** - Ankle foot orthosis, spiral, (institute of rehabilitative medicine type), plastic, custom fabricated - **L2275** – Addition to lower extremity, varus/valgus correction, plastic modification, padded/lined - **L2330** – Addition to lower extremity, lacer molded to patient model, for custom-fabricated orthosis only

Frequently asked questions

No. L2820 is an accessory code that must be billed in conjunction with a primary orthosis code (e.g., custom or prefabricated below-knee AFO). It does not stand alone.

It is appropriate when a patient experiences discomfort, skin irritation, or pressure points from a molded plastic orthosis, and a soft interface is added to mitigate these issues. Documentation must reflect medical necessity.

Yes. For interfaces fabricated directly to a patient model, use codes like L2330 (custom-fabricated lacer molded to patient model). L2820 is specifically for soft interfaces added to existing molded plastic orthoses.