HCPCS L6584: Preparatory Above-Elbow Plastic Socket, Locking Elbow - OpenPayer

Summary & Overview

HCPCS L6584: Preparatory Above-Elbow Plastic Socket, Locking Elbow

HCPCS Level II code L6584 denotes a preparatory prosthetic device for elbow disarticulation or above-elbow amputation: a single-wall plastic socket with a friction wrist, locking elbow, figure-of-eight harness, fair lead cable control, pylon, and no cover, molded to the patient. This code identifies a custom-fitted preparatory prosthesis used in early rehabilitation to support functional training and component selection.

Nationally, the code matters for prosthetics coverage, durable medical equipment management, and rehabilitation service planning because it defines a specific combination of components and customization that influence payer coverage decisions and clinical pathways. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will learn: the clinical context for L6584 as an above-elbow preparatory prosthesis; typical sites of service and clinical use during early prosthetic rehabilitation; common billing and coding considerations tied to HCPCS Level II classification; and where to find related policy guidance or benefit language. Data not available in the input: associated taxonomies, ICD-10 diagnoses, and related codes. The summary provides a concise reference for clinicians, billing staff, and policy analysts working with upper-limb prosthetic services.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareL6584HCPCS Level IIprostheticsupper-limb amputationpreparatory prosthesisrehabilitationorthotics and prostheticsprosthetic socket

Billing Code Overview

HCPCS Level II code L6584 describes a preparatory prosthetic device for patients with elbow disarticulation or above-elbow amputation. The item is a single-wall plastic socket with a friction wrist and locking elbow mechanism, fitted with a figure-of-eight harness, fair lead cable control, a pylon (USMC or equal), no cover, and molded to the patient model.

Service type: Prosthetic preparatory device for upper limb (above-elbow) amputation
Typical site of service: Prosthetic fabrication and fitting facility, outpatient orthotics and prosthetics clinic, or rehabilitation prosthetics department

Clinical & Coding Specifications

Clinical Context

A 45-year-old male with a transhumeral (above-elbow) amputation presents to a prosthetics clinic for fabrication of a preparatory, single-wall plastic socket prosthesis designed for elbow disarticulation or above-elbow level. The patient is evaluated by a certified prosthetist who documents limb volume stability, residual limb shape, and functional goals. A diagnostic and measurement visit includes: history review, limb inspection, casting or digital scanning to create a patient model, range-of-motion assessment of shoulder and contralateral limb, and determination of control method (figure-of-eight harness with fair lead cable control and friction wrist). The prosthetist selects a locking elbow mechanism and a USMC-style pylon without an external cosmetic cover for a durable preparatory device. Fabrication workflow includes: model modification, socket molding to the patient model, assembly of elbow and wrist components, alignment and bench fitting, initial dynamic fitting in clinic, patient training for donning/doffing and harness adjustments, and scheduled follow-up visits for alignment and fit adjustments. Typical payors involved include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, and Medicare; documentation supports medical necessity, prosthetic component selection, and functional outcome goals.

Coding Specifications

Modifier	Description	When to Use
`11`	Indicates the performance of the service by the billing practitioner as the usual, typical service

HCPCS L5972: Lower Extremity Prosthetic Foot, Flexible Keel

HCPCS-L6000-PARTIAL-HAND-THUMB-REMAINING-PROSTHESIS

HCPCS L6000: Partial Hand Prosthesis, Thumb Remaining

HCPCS-L5857-MICROPROCESSOR-KNEE-SHIN-SWING-PHASE-PROSTHESIS

HCPCS L5857: Microprocessor Knee-Shin Swing-Phase Prosthetic Component

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

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

HCPCS-L5973-MICROPROCESSOR-ANKLE-FOOT-ENDOSKELETAL-SYSTEM

HCPCS L5973: Endoskeletal Microprocessor Ankle-Foot System

HCPCS-L5988-LOWER-LIMB-PROSTHESIS-SHOCK-REDUCING-PYLON

HCPCS L5988: Lower Limb Prosthesis Vertical Shock-Reducing Pylon

HCPCS-L8679-IMPLANTABLE-NEUROSTIMULATOR-PULSE-GENERATOR

HCPCS L8679: Implantable Neurostimulator Pulse Generator

HCPCS-L5690-LOWER-EXTREMITY-BELOW-KNEE-WAIST-BELT-PADDED-LINED

HCPCS L5690: Addition to Lower Extremity, Below Knee, Waist Belt, Padded and Lined

HCPCS-L6300-SHOULDER-DISARTICULATION-MOLDED-SOCKET-INTERNAL-LOCKING-ELBOW

HCPCS L6300: Shoulder Disarticulation Prosthetic Assembly, Molded Socket

HCPCS-L6935-BELOW-ELBOW-MYOELECTRIC-PROSTHESIS-SELF-SUSPENDED

HCPCS L6935: Below-Elbow Myoelectric Prosthesis, Self-Suspended

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Taxonomy Code	Specialty	Notes
`261QM0800X`	Prosthetics and Orthotics	Certified prosthetists responsible for device design and fabrication.
`208000000X`	Physical Medicine & Rehabilitation	Physiatrists direct prosthetic prescription and functional goals.
`208100000X`	Orthopedic Surgery	Orthopedic surgeons manage amputation care and surgical indications.
`367500000X`	Occupational Therapy	OTs provide training in device use, ADLs, and functional integration.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`Z89.611`	Acquired absence of right arm above elbow	Common indication for an above-elbow prosthesis; justifies preparatory socket fabrication.
`Z89.612`	Acquired absence of left arm above elbow	Same relevance for left-sided above-elbow amputation needing prosthesis.
`Z89.621`	Acquired absence of right elbow and forearm	Supports need for an elbow-disarticulation-level prosthetic socket.
`Z89.622`	Acquired absence of left elbow and forearm	Supports prosthetic provision at elbow-disarticulation level on left side.
`S48.011A`	Traumatic amputation of right upper arm, initial encounter	Acute traumatic etiology leading to need for preparatory prosthesis during rehabilitation.
`S48.012A`	Traumatic amputation of left upper arm, initial encounter	Traumatic etiology on left side prompting prosthetic management.
`T86.801`	Complication of amputation, unspecified	Used when addressing wound or residual limb complications that impact prosthetic fitting.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic management and training, initial encounter, fitting and training (use with prosthetic equivalents when applicable)	Used for initial patient training, donning/doffing instruction, and functional integration following prosthesis delivery.
`97763`	Orthotic/prosthetic management and training, subsequent encounter	Used for follow-up training visits to adjust gait/ADL techniques and monitor prosthetic use.
`99456`	Work related or medical disability evaluation services (impairment rating)	Employed when formal functional or disability evaluations are requested in relation to prosthetic prescription.
`97530`	Therapeutic activities, direct (one-on-one) patient contact (use for ADL retraining)	Used by occupational therapists to retrain activities of daily living with the new prosthesis.
`99070`	Supplies and materials (unlisted)	Used to bill for additional noncovered disposable supplies or components not included in the L-code reimbursement when allowed.

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