L6920 Wrist Disarticulation | HCPCS Reimbursement | OpenPayer

Summary & Overview

HCPCS L6920: Wrist Disarticulation External Power Prosthesis

HCPCS Level II code L6920 covers an externally powered wrist disarticulation prosthesis with a self-suspended inner socket, removable forearm shell, switch-and-cable control, two batteries and one charger, and switch control of the terminal device (Otto Bock or equal). This code designates a complex upper-extremity prosthetic device intended to restore hand and forearm function following amputation at the wrist level. Nationally, such devices are clinically significant for mobility, activities of daily living, and work reintegration for patients with upper-limb loss.

Key payers referenced in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for L6920, typical sites of service and service type, and what to expect in coverage determinations. The publication summarizes common billing modifiers, payer coverage considerations, and typical components included with this HCPCS Level II code. It also highlights benchmarking points for device components and supply inclusions where available. Data not available in the input is explicitly noted where applicable.

This summary is intended for national audiences including prosthetics suppliers, billing professionals, and policy analysts seeking concise guidance on the clinical meaning and billing context of HCPCS Level II code L6920.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareL6920HCPCS Level IIprostheticsupper extremitywrist disarticulationdurable medical equipmentexternal power prosthesisbilling

Billing Code Overview

HCPCS Level II code L6920 describes a wrist disarticulation external power prosthesis with a self-suspended inner socket and removable forearm shell. The device specification includes branded or equivalent components (Otto Bock or equal), a switch and cables for control, two batteries and one charger, and switch control of the terminal device. This is an upper-extremity prosthetic device intended to replace function after wrist disarticulation.

Service Type: Prosthetic device provision and fitting

Typical Site of Service: Outpatient prosthetics clinic or durable medical equipment provider setting

Clinical & Coding Specifications

Clinical Context

A 45-year-old patient with a unilateral wrist disarticulation following traumatic amputation presents to a prosthetics clinic for provision of an externally powered, self-suspended prosthetic system. The device specified is an external power wrist disarticulation prosthesis with a self-suspended inner socket, removable forearm shell, integrated switch control of the terminal device, two batteries, one charger, cables, and manufacturer-equivalent components (e.g., Otto Bock) documented under L6920. Clinical workflow begins with a prosthetist or orthotist evaluation including measurement, residual limb assessment, and functional goal setting. A detailed plan of care is developed documenting the selected externally powered terminal device and control method (switch control), training needs, and expected visits. Fabrication includes casting or scanning, socket fitting, component ordering (including batteries, charger, switches, and cables), and iterative fitting sessions. Device delivery is followed by device training with occupational therapy for donning/doffing, prosthetic control using the switch system, skin checks, and follow-up adjustments. Routine maintenance visits and battery replacement are scheduled per manufacturer guidance. Typical sites of service are an outpatient prosthetics clinic or hospital outpatient department where prosthetic fabrication and training occur. Payers involved may include private commercial insurers (Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, BUCA plans) and Medicare; prior authorization documentation often includes medical necessity for the externally powered prosthesis, supporting residual limb status, functional limitations, and progress notes from therapy.

Coding Specifications

Modifier	Description	When to Use

HCPCS L5987: Lower Extremity Prosthesis, Shank-Foot with Vertical Loading Pylon

HCPCS-L6025-TRANSCARPAL-PARTIAL-HAND-MYOELECTRIC-PROSTHESIS

HCPCS L6025: Transcarpal/Partial Hand Myoelectric Prosthesis

HCPCS-L5570-PREPARATORY-ABOVE-KNEE-KNEE-DISARTICULATION-ISCHIAL-SOCKET-PYLON

HCPCS L5570: Preparatory Above-Knee Prosthetic with Ischial Socket and Pylon

HCPCS-L5979-LOWER-EXTREMITY-PROSTHESIS-MULTI-AXIAL-ANKLE-DYNAMIC-FOOT

HCPCS L5979: Lower Extremity Prosthesis, Multi-Axial Ankle with Dynamic Response Foot

HCPCS-L5828-ENDOSKELETAL-KNEE-SHIN-SINGLE-AXIS-FLUID-CONTROL

HCPCS Level II L5828: Endoskeletal Knee-Shin Addition, Fluid Swing and Stance Control

HCPCS-L6940-EXTERNAL-POWER-ELBOW-DISARTICULATION-PROSTHESIS

HCPCS L6940: External Power Elbow Disarticulation Prosthesis

HCPCS-L5855-HIP-DISARTICULATION-ENDOSKELETAL-HIP-EXTENSION-ASSIST

HCPCS L5855: Endoskeletal Hip Prosthesis Addition, Mechanical Extension Assist

HCPCS-L8514-TRACHEOESOPHAGEAL-PUNCTURE-DILATOR-REPLACEMENT

HCPCS L8514: Tracheoesophageal Puncture Dilator, Replacement Only, Each

HCPCS-L5969-POWER-ASSIST-ANKLE-FOOT-SYSTEM-ADDITION

HCPCS L5969: Addition of Power-Assist to Endoskeletal Ankle-Foot System

HCPCS-L8320-TRUSS-WATER-PAD-ADDITION

HCPCS Level II L8320: Truss Addition to Standard Pad, Water Pad

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Taxonomy Code	Specialty	Notes
`174100000X`	Physical Medicine & Rehabilitation Physician	Oversees functional goals and approves prosthetic needs.
`234Z00000X`	Prosthetics & Orthotics (Orthotist/Prosthetist)	Primary provider responsible for device evaluation, fabrication, fitting, and adjustments.
`261QM0800X`	Occupational Therapist	Provides training in activities of daily living and device control (switch training).
`208000000X`	Physical Therapist	Provides mobility, strength, and functional training related to prosthesis use.
`207Q00000X`	Physician Assistant	Provides evaluation and follow-up under supervising physician when applicable.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`Z89.612`	Acquired absence of right forearm at wrist level	Common status post traumatic or surgical wrist disarticulation indicating need for prosthesis fitting.
`Z89.611`	Acquired absence of left forearm at wrist level	Indicates left-sided wrist disarticulation appropriate for a left-sided device such as `L6920` when left-sided.
`S48.191A`	Unspecified injury of right forearm, initial encounter	Traumatic injury that may lead to amputation or necessitate prosthetic provision after initial care.
`S48.192A`	Unspecified injury of left forearm, initial encounter	Same as above for left-sided injuries progressing to prosthetic needs.
`T87.81XA`	Complications of amputation stump, initial encounter	Stump complications that impact socket design and indicate modifications included in fabrication of `L6920`.
`Z98.890`	Other specified postprocedural states	General post-amputation status often used in medical necessity documentation for prosthetic devices.
`G54.6`	Injury of brachial plexus at shoulder and upper arm level	Neurologic injury that can contribute to upper-limb dysfunction and drive need for externally powered prosthesis with alternate controls.
`M62.81`	Muscle weakness (generalized)	Functional limitation that can influence control options and justification for externally powered components.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic(s) management and training, initial encounter, fitting and training (includes assessment and instruction)	Used by therapists to document initial prosthetic training for donning/doffing, use of switch control, and functional activities after delivery of `L6920`.
`97761`	Prosthetic training, initial encounter, gait and/or prosthetic use training for lower or upper limb prosthesis	Documents focused prosthetic training sessions specific to upper-limb externally powered devices following device delivery.
`99070`	Supplies and materials (except spectacles), provided by the physician over and above those usually included with the office visit	Used to bill for expendable supplies or small non-durable items related to prosthetic fitting if allowed by payer policies.
`A9280`	Non-covered item or service; specimen handling or miscellaneous	Use varies by payer; sometimes used in billing for miscellaneous prosthetic components when no HCPCS exists (payer-dependent).
`99455`	Work-related or medical disability examination services, per report	May be used when functional capacity evaluation or work-related prosthetic justification is required during the prosthetic care episode.

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