L5711 Exoskeletal Knee‑Shin (HCPCS) Reimbursement | OpenPayer

Summary & Overview

HCPCS L5711: Exoskeletal Knee-Shin, Single-Axis Manual Lock

HCPCS Level II code L5711 denotes an exoskeletal knee-shin orthotic device—a single-axis, manual-lock system made from ultra-light materials. This code captures devices used to stabilize the knee and lower leg for patients requiring external mechanical support, and it matters nationally because orthotic device coding drives coverage determinations, claims processing, and provider billing accuracy for prosthetics and orthotics services. Key payers evaluated include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will learn what L5711 represents in clinical and billing terms, typical sites of service, and which payers commonly cover the device. The publication provides benchmarks for coding and reimbursement practices, summaries of payer policy positions where available, and clinical context about device indications and use. Where specific payer policy details, associated taxonomies, ICD-10 diagnoses, or related codes are not provided in the input, the report marks those items as not available. The goal is to give clinicians, billing professionals, and policy analysts a concise reference for identifying L5711 and understanding its role in durable medical equipment and orthotics service lines.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareL5711HCPCS Level IIorthoticsknee-shin orthosisdurable medical equipmentprosthetics and orthoticsmanual lock knee jointexoskeletal device

Billing Code Overview

HCPCS Level II code L5711 describes an additions exoskeletal knee-shin system, single axis, manual lock, ultra-light material. This device is an orthotic component designed to provide knee and shin support with a single-axis hinge and a manual locking mechanism. The service type is prosthetic/orthotic device provision and fitting. The typical site of service is outpatient orthotics and prosthetics clinics or durable medical equipment providers where the device is measured, fabricated, fitted, and adjusted for the patient.

Clinical & Coding Specifications

Clinical Context

A 56-year-old male with a transtibial amputation and chronic knee instability is fitted with an exoskeletal knee-shin orthosis to provide knee control and stance-phase stability during community ambulation. The orthotist evaluates the patient in an outpatient prosthetics/orthotics clinic, documents limb measurements, functional goals, and gait deficits, and orders an add-on knee-shin component described as L5711 (additions exoskeletal knee-shin system, single axis, manual lock, ultra-light material). The workflow includes initial assessment, fabrication or procurement of the L5711 knee-shin addition, fitting and alignment in the clinic, functional training with a physical therapist, and a follow-up visit to check fit, skin integrity, and gait.

Typical site of service: outpatient prosthetics/orthotics clinic, outpatient physical therapy center, or orthopedics clinic. Typical patient scenario: ambulatory adult with lower-limb amputation, significant quadriceps weakness, knee instability, or neurologic deficit requiring a single-axis manual lock knee-shin addition in an ultra-light material for improved stance control and reduced device weight.

Coding Specifications

Modifier	Description	When to Use
`11`	Services performed by the physician

HCPCS L6883: Replacement Below-Elbow/Wrist-Disarticulation Socket

HCPCS-L6205-ELBOW-DISARTICULATION-MOLDED-SOCKET-EXPANDABLE-INTERFACE

HCPCS L6205: Elbow Disarticulation Molded Socket with Expandable Interface

HCPCS-L5629-BELOW-KNEE-ACRYLIC-SOCKET-ADDITION

HCPCS L5629: Addition to Lower Extremity, Below Knee, Acrylic Socket

HCPCS-L7364-TWELVE-VOLT-BATTERY-DURABLE-MEDICAL-EQUIPMENT

HCPCS L7364: Twelve Volt Battery, Durable Medical Equipment

HCPCS-L5706-KNEE-DISARTICULATION-PROTECTIVE-COVER

HCPCS L5706: Custom Protective Cover for Knee Disarticulation

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

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

HCPCS-L5200-ABOVE-KNEE-MOLDED-SOCKET-SINGLE-AXIS-KNEE-SACH-FOOT

HCPCS Level II L5200: Above-Knee Prosthesis with Single-Axis Knee

HCPCS-L6320-SHOULDER-DISARTICULATION-SHOULDER-CAP-PASSIVE-RESTORATION

HCPCS L6320: Shoulder Disarticulation Shoulder Cap, Passive Restoration

HCPCS-L5859-POWERED-PROGRAMMABLE-KNEE-SHIN-ASSIST

HCPCS L5859: Powered Programmable Knee-Shin Assist

HCPCS-L5964-ENDOSKELETAL-ABOVE-KNEE-FLEXIBLE-COVERING

HCPCS L5964: Endoskeletal Above-Knee Flexible Protective Outer Covering

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Taxonomy Code	Specialty	Notes
225100000X	Prosthetics & Orthotics	Primary specialty that evaluates, fabricates, and fits `L5711` components.
207X00000X	Orthopedic Surgery	Orthopedic surgeons may prescribe or coordinate orthotic devices for post-amputation or knee instability cases.
225600000X	Physical Medicine & Rehabilitation	Physiatrists commonly prescribe, assess functional needs, and coordinate orthotic care and therapy.
261QP2300X	Physical Therapy	Physical therapists perform gait training and functional assessment after fitting of the knee-shin addition.
333600000X	Vascular Surgery	Vascular surgeons may be involved in limb-preservation patients who require orthotic interventions.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`Z89.511`	Acquired absence of right leg below knee	Common indication for use when a transtibial amputee requires knee-shin stabilization as part of prosthetic/orthotic management.
`Z89.512`	Acquired absence of left leg below knee	Same clinical relevance for left-sided transtibial amputees requiring exoskeletal knee-shin addition.
`M21.361`	Flat foot (pes planus), right foot	Associated gait alteration that may contribute to need for supportive orthoses and knee-shin control.
`M21.362`	Flat foot (pes planus), left foot	Same relevance for left-sided involvement affecting gait and orthotic needs.
`M62.81`	Muscle weakness (generalized)	Weakness contributing to knee instability and the need for a manual-lock knee-shin addition.
`G83.4`	Monoplegia of lower limb	Neurologic deficit resulting in knee instability or compromised control that may necessitate an exoskeletal knee-shin system.
`S78.091A`	Laceration with foreign body of right thigh, initial encounter	Example of traumatic lower-limb injury that could lead to complications requiring orthotic intervention.
`M24.561`	Contracture, right knee	Joint contractures that alter gait mechanics and may require knee-shin support for stability.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97763`	Orthotic(s)/prosthetic(s) management and training, upper or lower extremity, initial encounter, each 15 minutes	Used for patient training and gait/functional training after fitting the `L5711` knee-shin addition.
`97762`	Orthotic(s)/prosthetic(s) management and training, initial encounter, each 15 minutes (establishment)	Used for the initial assessment and education related to the orthotic device and its safe use.
`99203`	Office or other outpatient visit for the evaluation and management of a new patient, low to moderate complexity	May be used for the initial clinical evaluation leading to prescription of the `L5711` component.
`99070`	Supplies and materials (except spectacles), provided by the physician over and above those usually included with the office visit	Used to bill for noncovered supplies or additional materials associated with custom fitting when payer policies permit.
`97530`	Therapeutic activities, direct (one-on-one) patient contact, each 15 minutes	Used during physical therapy sessions for functional strengthening and mobility training after orthosis fitting.

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