L6665 Upper Extremity Teflon Lining | HCPCS Reimbursement | OpenPayer

Summary & Overview

HCPCS L6665: Upper Extremity Addition, Teflon Cable Lining

HCPCS Level II code L6665 designates an upper extremity addition: Teflon or equivalent cable lining for prosthetic devices. Nationally, this code is relevant to prosthetics suppliers, outpatient clinics, and payers managing durable medical equipment benefits for upper-limb amputees. Coverage and payment policies for prosthetic components like cable linings affect access to appropriate fittings and ongoing device maintenance.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides an overview of typical billing scenarios, common modifiers used with HCPCS Level II codes, and where L6665 fits within prosthetic service lines. Readers will find concise benchmarks for utilization and reimbursement ranges where available, summaries of payer policy themes affecting prosthetic component coverage, and clinical context on the role of cable linings in upper-extremity prostheses.

This summary is intended for a national audience of billing professionals, prosthetists, clinical managers, and policy analysts seeking a clear reference for how HCPCS Level II code L6665 is described and applied in prosthetic service billing. Data not available in the input will be noted in detailed sections.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareL6665HCPCS Level IIprostheticsupper extremitydurable medical equipmentprosthetic componentscable liningTeflon replacement

Billing Code Overview

HCPCS Level II code L6665 describes an upper extremity addition, Teflon or equal, cable lining. This code represents a prosthetic component used to add or replace a cable lining in an upper-limb prosthesis, typically constructed of Teflon or an equivalent material. The service type is prosthetic component supply and modification for an upper extremity prosthesis. The typical site of service is an outpatient prosthetics clinic or durable medical equipment provider specializing in prosthetic fittings and adjustments.

Clinical & Coding Specifications

Clinical Context

A 58-year-old patient with a history of peripheral nerve injury to the dominant upper extremity presents for prosthetic component adjustment following transradial amputation. The prosthetist evaluates the socket fit and mechanical components and determines the existing cable lining is worn and requires replacement with a Teflon (or equivalent) cable lining to restore smooth operation of the terminal device. The service is provided in an outpatient prosthetics clinic or orthotics/prosthetics workshop. The clinical workflow includes pre-service assessment of socket and cable integrity, removal of the worn cable lining, installation of the L6665 upper extremity Teflon cable lining, function testing of cable tension and terminal device operation, and patient education on care and follow-up for device adjustments. Documentation includes the prosthetic component replaced, reason for replacement (wear, fraying, mechanical failure), measurements or part identifiers, technician or prosthetist credentials, and any applicable modifier to indicate laterality or unusual circumstances.

Coding Specifications

Modifier	Description	When to Use
`LT`	Left side	Use when the Teflon cable lining is provided for the left upper extremity prosthesis.

HCPCS L5628: Addition to Lower Extremity, Test Socket, Hemipelvectomy

HCPCS-L5646-LOWER-EXTREMITY-BELOW-KNEE-CUSHION-SOCKET

HCPCS L5646: Below-Knee Prosthetic Cushion Socket Addition

HCPCS-L5160-KNEE-DISARTICULATION-MOLDED-SOCKET-BENT-KNEE-SACH-FOOT

HCPCS L5160: Knee Disarticulation Molded Socket with Bent Knee and SACH Foot

HCPCS-L8046-PARTIAL-FACIAL-PROSTHESIS-NON-PHYSICIAN

HCPCS L8046: Partial Facial Prosthesis, Non-Physician

HCPCS-L5684-LOWER-EXTREMITY-BELOW-KNEE-FORK-STRAP

HCPCS L5684: Addition to Lower Extremity, Below-Knee, Fork Strap

HCPCS-L7009-ELECTRIC-MYOELECTRIC-HOOK-ADULT

HCPCS L7009: Electric/Myoelectric Adult Prosthetic Hook

HCPCS-L6697-UPPER-EXTREMITY-PROSTHETIC-SOCKET-INSERT-SILICONE

HCPCS L6697: Custom Silicone Socket Insert for Upper Extremity Prosthesis

HCPCS-L6670-UPPER-EXTREMITY-HOOK-TO-HAND-CABLE-ADAPTER

HCPCS L6670: Upper Extremity Hook-to-Hand Cable Adapter

HCPCS-L6880-ELECTRIC-MYOELECTRIC-HAND-ARTICULATING-DIGITS

HCPCS L6880: Electric/Myoelectric Hand with Independently Articulating Digits

HCPCS-L5848-ENDOSKELETAL-KNEE-SHIN-FLUID-STANCE-EXTENSION-DAMPENING

HCPCS L5848: Endoskeletal Knee-Shin Fluid Stance Extension, Dampening Feature

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RT

Taxonomy Code	Specialty	Notes
`228100000X`	Prosthetist/Orthotist	Primary clinicians who fit and replace prosthetic components.
`261QM0800X`	Physician Assistant	May perform evaluation and assist in prosthetic management under supervision.
`207L00000X`	Occupational Therapist	Performs functional assessment and training with the prosthesis after component replacement.
`208000000X`	Physical Therapist	May assist with range-of-motion and functional rehabilitation related to prosthetic use.
`367500000X`	Durable Medical Equipment Supplier	Provides prosthetic parts and coordinates delivery and fitting.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`Z89.612`	Acquired absence of right arm above elbow	Relevant for prosthetic component fitting and replacement on a right transradial/upper-arm amputation.
`Z89.611`	Acquired absence of left arm above elbow	Relevant for prosthetic component fitting and replacement on a left transradial/upper-arm amputation.
`S48.131A`	Strain of muscle, fascia and tendon of the upper arm, right arm, initial encounter	May be associated with traumatic injuries leading to prosthetic need and component wear.
`T14.8XXA`	Other injury of unspecified body region, initial encounter	Used when specific injury documentation is limited but prosthetic replacement is required.
`M24.271`	Other articular cartilage disorders, shoulder region, right shoulder	Chronic joint issues that may affect prosthetic use and necessitate component adjustments.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic management and training, upper extremity; initial encounter, each 15 minutes	May be performed before or after component replacement to train the patient in prosthesis use and care.
`97763`	Orthotic/prosthetic management and training, upper extremity, subsequent encounter	Used for follow-up training and adjustments after installation of the `L6665` component.
`99070`	Supplies and materials (except spectacles), noncovered items, provided by physician over and above those usually included	Billed when additional non-covered parts or consumable supplies are provided during the repair/replacement.
`99090`	Analysis of clinical data, physician time	May be used if complex documentation or data review supports medical necessity for a specialty component.
`99080`	Additional documentation for special reports	Used when payors require extra documentation with the claim for prosthetic components.

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