L7404 HCPCS Reimbursement & Policy Benchmarks | OpenPayer

Summary & Overview

HCPCS L7404: Addition to Upper Extremity Prosthesis, Above Elbow, Acrylic

HCPCS Level II code L7404 denotes an addition to an upper extremity prosthesis for an above elbow disarticulation, fabricated from acrylic material. The code identifies a prosthetic component used in the construction or modification of above-elbow prostheses and is relevant to clinicians, prosthetists, and payers involved in limb reconstruction and rehabilitation. Nationally, prosthetic-addition codes like L7404 matter because they define coverage eligibility, billing specificity, and device classification for durable medical equipment benefits.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the code's clinical context, typical sites of service, and the typical billing modifiers that may be applied (listed separately). The publication also outlines expected benchmarks and policy considerations relevant to prosthetic additions, including documentation expectations and coding pathways for upper-extremity prosthetic fittings.

This piece provides operationally focused information: what the code represents, which payers commonly process such claims, and the types of clinical settings where the service is delivered. Data not available in the input will be noted where applicable in detailed sections.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareL7404HCPCS Level IIupper extremity prosthesisabove elbow disarticulationprostheticsacrylic materialdurable medical equipmentprosthesis addition

Billing Code Overview

HCPCS Level II code L7404 is an addition to an upper extremity prosthesis specified for an above elbow disarticulation and constructed of acrylic material. This component is intended as a prosthetic additive to an existing upper-limb prosthesis for patients with an above-elbow amputation.

Service type: Prosthetic component addition
Typical site of service: Prosthetics/orthotics clinic, outpatient rehabilitation facility, or prosthesis fabrication lab

Clinical & Coding Specifications

Clinical Context

A 48-year-old male with a transhumeral (above-elbow) amputation following traumatic injury presents to a prosthetics clinic for fabrication of an addition component to his existing upper extremity prosthesis. The additive component is an acrylic cosmetic shell and socket modification designed to improve fit and appearance at the disarticulation level. The clinical workflow includes initial prosthetist evaluation, measurement and casting of the residual limb, selection of appropriate acrylic materials, fabrication of the addition in the prosthetic laboratory, fitting and adjustment in clinic, and patient education on donning, doffing, and care. Follow-up visits are scheduled to evaluate fit, pressure areas, and functional use. Typical sites of service include outpatient prosthetics clinics, specialty orthotics and prosthetics laboratories, and hospital-based prosthetics departments.

Coding Specifications

Modifier	Description	When to Use
`LT`	Left side	Use when the addition is for the left upper extremity prosthesis
`RT`	Right side	Use when the addition is for the right upper extremity prosthesis (note: is not in provided list; use instead for upper extremity laterality when payer accepts)

HCPCS L5824: Endoskeletal Knee-Shin Single-Axis with Fluid Swing Control

HCPCS-L5611-ABOVE-KNEE-KNEE-DISARTICULATION-4-BAR-FRICTION-KNEE

HCPCS L5611: Endoskeletal Above-Knee Knee-Disarticulation 4-Bar Friction Knee

HCPCS-L8695-EXTERNAL-RECHARGING-SYSTEM-IMPLANTABLE-NEUROSTIMULATOR-REPLACEMENT

HCPCS L8695: External Recharging System for Implantable Neurostimulator, Replacement Only

HCPCS-L8420-PROSTHETIC-SOCK-BELOW-KNEE-MULTIPLE-PLY

HCPCS L8420: Prosthetic Sock, Multiple Ply, Below Knee, Each

HCPCS-L8400-PROSTHETIC-SHEATH-BELOW-KNEE

HCPCS L8400: Prosthetic Sheath, Below Knee, Each

HCPCS-L5658-ABOVE-KNEE-SOCKET-INSERT-ADDITION

HCPCS L5658: Addition to Above-Knee Prosthetic Socket Insert

HCPCS-L5530-BELOW-KNEE-PREPARATORY-PTB-SOCKET-SACH-FOOT

HCPCS L5530: Below-Knee Preparatory PTB Socket with SACH Foot

HCPCS-L6890-UPPER-EXTREMITY-PROSTHESIS-GLOVE-PREFABRICATED

HCPCS L6890: Prefabricated Glove for Upper Extremity Prosthesis

HCPCS-L6721-PROSTHETIC-TERMINAL-DEVICE-HOOK-OR-HAND-HEAVY-DUTY

HCPCS L6721: Prosthetic Terminal Device, Heavy-Duty Mechanical Hook or Hand

HCPCS-L8470-PROSTHETIC-SOCK-BELOW-KNEE-SINGLE-PLY

HCPCS L8470: Prosthetic Sock, Single-Ply, Below-Knee Fitting

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RT

UE

Taxonomy Code	Specialty	Notes
`206D00000X`	Prosthetics and Orthotics	Primary specialty responsible for fabrication and fitting
`2080P0205X`	Physical Medicine & Rehabilitation	Clinicians who evaluate functional needs and coordinate prosthetic care
`207L00000X`	Physical Therapy	Provides rehabilitation and training for prosthetic use
`207K00000X`	Occupational Therapy	Provides activities-of-daily-living training and functional upper-extremity prosthetic training

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`Z89.211`	Acquired absence of right upper limb above elbow	Indicates a patient with right above-elbow amputation who may require an acrylic addition to an upper extremity prosthesis
`Z89.212`	Acquired absence of left upper limb above elbow	Indicates a patient with left above-elbow amputation who may require an acrylic addition to an upper extremity prosthesis
`S48.031A`	Traumatic amputation of right shoulder and upper arm, initial encounter	Represents traumatic etiology leading to above-elbow disarticulation and need for prosthetic addition
`S48.032A`	Traumatic amputation of left shoulder and upper arm, initial encounter	Represents traumatic etiology leading to above-elbow disarticulation and need for prosthetic addition
`T79.A11A`	Traumatic amputation sequela, right upper limb	Used for coding late effects or sequelae during prosthetic rehabilitation
`T79.A12A`	Traumatic amputation sequela, left upper limb	Used for coding late effects or sequelae during prosthetic rehabilitation

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic(s) management and training: initial, more than one orthosis, upper or lower extremity; fitting and training	Used for patient training and education after receipt of the prosthetic addition
`97763`	Orthotic(s)/prosthetic(s) management and training, upper extremity, initial	Directly relevant for instruction and functional training with the new acrylic addition
`99070`	Supplies and materials (used when not billed separately)	May be used by some payers to bill for non-covered supplies or materials used in fabrication if allowed
`A9270`	Noncovered item or service (not payable by Medicare)	Used by some suppliers to indicate cosmetic components when not covered by the payer (note: HCPCS Level II cross-reference for billing context)
`20550`	Injection(s); single tendon sheath, or ligament, or ganglion cyst (if applicable)	Occasionally used if minor in-clinic procedures (e.g., aspiration, local debridement) are required prior to fitting (used only when clinically performed)

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