HCPCS L5722: Exoskeletal Knee-Shin Addition, Pneumatic Swing with Friction Stance - OpenPayer

Summary & Overview

HCPCS L5722: Exoskeletal Knee-Shin Addition, Pneumatic Swing with Friction Stance

HCPCS Level II code L5722 designates an addition to an exoskeletal knee-shin orthotic system: a single-axis unit with pneumatic swing control and friction-based stance phase control. This component is used to improve gait dynamics and stance stability for patients requiring orthotic knee-shin support, and it is billed as a distinct orthotic addition. Nationally, this code matters because it defines coverage and payment pathways for advanced orthotic components that can affect patient mobility outcomes and durable medical equipment (DME) spending.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how L5722 is categorized, the clinical context for its use, and what to expect in payer consideration. The publication summarizes common billing modifiers and operational notes (listed separately), typical sites of service, and how this component fits into the orthotics service line.

This analysis provides benchmarks for coding practice, highlights relevant policy considerations that influence reimbursement, and outlines clinical scenarios where a pneumatic swing with friction stance control is applied. Data not available in the input is noted where applicable, and the content is intended to help billing professionals, clinicians, and administrators understand the role and classification of HCPCS Level II code L5722 in national practice.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareL5722HCPCS Level IIorthoticsknee-shin systemexoskeletal componentdurable medical equipmentgait assistancepneumatic swingstance phase control

Billing Code Overview

HCPCS Level II code L5722 describes an addition to an exoskeletal knee-shin system featuring a single axis with pneumatic swing and friction stance phase control. This code represents a component added to a lower-limb orthotic system to assist knee and shin mechanics for ambulatory support.

Service type: Orthotic component addition for a lower-extremity exoskeletal knee-shin system
Typical site of service: Durable medical equipment suppliers, outpatient orthotics and prosthetics clinics, and ambulatory rehabilitation settings

Clinical & Coding Specifications

Clinical Context

A 58-year-old patient with a transfemoral or knee-disarticulation amputation is evaluated in a prosthetics clinic for improved gait stability and energy efficiency. The patient reports asymmetric gait, reduced walking endurance, and knee control issues during swing and stance phases when using a basic exoskeletal prosthesis. The prosthetist recommends adding an exoskeletal knee-shin system with a single-axis knee, pneumatic swing control, and friction stance-phase control to the existing prosthesis to improve swing-phase cadence and provide predictable stance stability.

The clinical workflow includes: initial prosthetic evaluation and gait analysis by a certified prosthetist and physical therapist; measurement and ordering of the L5722 component as an addition to the current prosthesis; fabrication and component integration in the prosthetic lab; fitting and alignment session; and follow-up training and functional adjustments over 2–3 visits to optimize swing tension, pneumatic resistance, and stance friction. Documentation includes baseline functional measures, rationale for the addition, itemized component order referencing L5722, fitting notes, patient-reported outcomes, and subsequent adjustments.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component

HCPCS L5974: Lower Extremity Prosthesis Foot, Single-Axis Ankle/Foot

HCPCS-L8616-COCHLEAR-IMPLANT-MICROPHONE-REPLACEMENT

HCPCS L8616: Microphone for Cochlear Implant Device, Replacement

HCPCS-L5685-BELOW-KNEE-PROSTHESIS-SUSPENSION-SEALING-SLEEVE

HCPCS L5685: Below-Knee Prosthesis Suspension/Sealing Sleeve

HCPCS-L5312-KNEE-DISARTICULATION-MOLDED-SOCKET-SINGLE-AXIS-KNEE

HCPCS L5312: Knee Disarticulation Prosthesis with Single-Axis Knee

HCPCS-L5976-LOWER-EXTREMITY-ENERGY-STORING-FOOT

HCPCS L5976: All Lower Extremity Energy-Storing Prosthetic Foot

HCPCS-L5703-SYMES-ANKLE-PROSTHETIC-SOCKET-SACH-REPLACEMENT

HCPCS L5703: Symes Ankle Prosthetic Socket, Molded to Patient Model

HCPCS-L8606-INJECTABLE-URINARY-BULKING-AGENT-1ML-SYRINGE

HCPCS L8606: Injectable Urinary Tract Bulking Agent, 1 ml Syringe

HCPCS-L6640-UPPER-EXTREMITY-SHOULDER-ABDUCTION-JOINT-PAIR

HCPCS Level II L6640: Upper Extremity Shoulder Abduction Joint, Pair

HCPCS-L6686-UPPER-EXTREMITY-SUCTION-SOCKET-ADDITION

HCPCS L6686: Upper Extremity Addition, Suction Socket

HCPCS-L5321-ABOVE-KNEE-MOLDED-SOCKET-SACH-FOOT-SINGLE-AXIS-KNEE

HCPCS L5321: Above-Knee Molded Socket with SACH Foot, Single-Axis Knee

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Taxonomy Code	Specialty	Notes
`332B00000X`	Prosthetics & Orthotics	Certified prosthetists who prescribe, fabricate, fit, and adjust `L5722`.
`2086P0800X`	Physical Therapy	Physical therapists who perform gait analysis and training after component integration.
`208D00000X`	Orthopedic Surgery	Orthopedic surgeons who may be involved in surgical residual-limb management or oversight when surgical history affects prosthetic use.
`208M00000X`	Physical Medicine & Rehabilitation	PM&R physicians who coordinate prosthetic prescription and functional goals.
`363L00000X`	Occupational Therapy	Occupational therapists providing functional training as appropriate for mobility and ADLs.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`Z43.1`	Encounter for attention to artificial limb	Indicates care related to prosthetic component addition and fitting.
`Z89.611`	Acquired absence of left leg above knee	Relevant for patients with transfemoral amputation receiving a knee-shin addition.
`Z89.612`	Acquired absence of right leg above knee	Relevant for contralateral transfemoral amputations when `L5722` is added to the prosthesis.
`Z89.421`	Acquired absence of left lower leg below knee	Relevant for knee-disarticulation or transtibial variants when knee-shin system components are considered.
`Z89.422`	Acquired absence of right lower leg below knee	Same as above for the right side.
`G82.50`	Unspecified paraplegia, unspecified	Applicable when reduced lower-limb function requires prosthetic knee-shin modifications to optimize gait.
`M21.46`	Valgus deformity, left lower leg	Structural alignment issues that may necessitate specialized prosthetic knee-shin components.
`M21.45`	Varus deformity, left lower leg	Alignment deformities that influence prosthetic knee-shin selection and tuning.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic management and training, initial encounter; 1 lower extremity	Used for initial training and gait retraining after addition of `L5722` to the prosthesis.
`97763`	Orthotic/prosthetic management and training, established patient, lower extremity	Used for follow-up visits focused on functional training and adjustments after fitting the knee-shin system.
`97750`	Physical performance test or measurement (e.g., musculoskeletal, functional capacity)	Used for baseline and post‑fitting functional assessments such as timed walk tests and balance measures.
`99456`	Work related or medical disability examination	Used when documentation of functional capacity with the new prosthetic component is required for disability or work clearance determinations.
`97755`	Assistive technology assessment	Used when a comprehensive prosthetic needs assessment and device justification, including `L5722`, is performed.

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