L5979 Lower Extremity Prosthesis Reimbursement | OpenPayer

Summary & Overview

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

HCPCS Level II code L5979 denotes an all lower extremity prosthesis: a one-piece system combining a multi-axial ankle and dynamic response foot. This code is used when reporting the provision of an integrated prosthetic foot-ankle system intended to restore ambulatory function and provide energy return for lower-limb amputees. Nationally, such devices are significant for mobility outcomes, prosthetic care pathways, and durable medical equipment reimbursement policies.

Key payers considered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for L5979, typical sites of service, and common billing practices. The publication summarizes available benchmarks on utilization and payment patterns, highlights relevant policy and coverage considerations affecting access to multi-axial dynamic response feet, and explains implications for providers and suppliers.

This report provides: (1) a concise description of the device and service captured by L5979; (2) payer coverage patterns and coding considerations; and (3) operational notes on documentation and claim submission where applicable. Data not available in the input is identified explicitly in applicable sections.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareL5979HCPCS Level IIlower extremity prosthesisprostheticsdynamic response footmulti-axial ankledurable medical equipmentorthotics and prostheticsprosthetic coding

Billing Code Overview

HCPCS Level II code L5979 describes an all lower extremity prosthesis, multi-axial ankle, dynamic response foot, one piece system. This item represents a single-piece lower limb prosthetic device that integrates a multi-axial ankle with a dynamic response prosthetic foot to provide flexibility and energy return for ambulatory patients.

Service Type: Prosthetic device provision and fitting

Typical Site of Service: Outpatient prosthetics clinics, orthotics and prosthetics (O&P) facilities, and medical supply providers

Clinical & Coding Specifications

Clinical Context

A 56-year-old male with transtibial amputation from a motor vehicle collision presents to a regional prosthetics clinic for prosthetic fitting and delivery. He has stable residual-limb volume, intact skin, good balance, and community ambulator goals. The prosthetist prescribes a lower extremity prosthesis that integrates a multi-axial ankle with a dynamic response foot as a one-piece system billed with L5979. The clinical workflow includes pre-fitting evaluation (residual-limb assessment, gait analysis, functional level determination), ordering and fabrication of the customized one-piece prosthesis, in-clinic fitting and alignment, patient education on donning/doffing and gait training, and scheduled follow-up visits for adjustments and functional outcome assessment. Typical durable medical equipment supplier and prosthetist interaction includes verification of benefit coverage, medical necessity documentation, and use of appropriate modifier codes on claims. Typical site of service is an outpatient prosthetics clinic or ambulatory specialty clinic; occasional fittings occur in a hospital outpatient department for postoperative patients or in skilled nursing facilities for homebound patients.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier / default	Used when no specific modifier is necessary for the claim.

HCPCS L6638: Upper Extremity Prosthesis Addition, Electric Locking Feature

HCPCS-L8624-LITHIUM-ION-BATTERY-COCHLEAR-EAR-LEVEL-REPLACEMENT

HCPCS L8624: Lithium Ion Battery for Cochlear Implant Speech Processor

HCPCS-L5535-PREPARATORY-BELOW-KNEE-PTB-SOCKET-PREFABRICATED

HCPCS L5535: Preparatory Below-Knee PTB Socket, Prefabricated

HCPCS-L9900-ORTHOTIC-PROSTHETIC-SUPPLY-ACCESSORY

HCPCS L9900: Orthotic and Prosthetic Supply or Accessory

HCPCS-L6714-PEDIATRIC-MECHANICAL-VOLUNTARY-CLOSING-HAND-TERMINAL-DEVICE

HCPCS L6714: Pediatric Mechanical Voluntary-Closing Hand Terminal Device

HCPCS-L5986-LOWER-EXTREMITY-PROSTHESIS-MULTI-AXIAL-ROTATION-UNIT

HCPCS L5986: Lower Extremity Prosthesis, Multi-Axial Rotation Unit

HCPCS-L8701-POWERED-UPPER-EXTREMITY-RANGE-OF-MOTION-ASSIST-DEVICE

HCPCS L8701: Powered Upper Extremity Range-of-Motion Assist Device

HCPCS-L6915-HAND-RESTORATION-REPLACEMENT-GLOVE

HCPCS L6915: Hand Restoration and Replacement Glove

HCPCS-L8693-AUDITORY-OSSEOINTEGRATED-DEVICE-ABUTMENT-REPLACEMENT

HCPCS Level II L8693: Auditory Osseointegrated Device Abutment, Replacement Only

HCPCS-L5845-ENDOSKELETAL-KNEE-SHIN-STANCE-FLEXION-ADJUSTABLE

HCPCS L5845: Endoskeletal Knee-Shin Addition with Adjustable Stance Flexion

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Taxonomy Code	Specialty	Notes
`207L00000X`	Prosthetics and Orthotics	Primary providers who fabricate and fit lower-extremity prostheses.
`2083P0200X`	Physical Therapy	Provides gait training and functional rehabilitation after fitting.
`207R00000X`	Orthotics/Prosthetics Assistant	Supports fabrication and adjustments under supervision.
`2086S0123X`	Wound Care	Manages residual-limb skin integrity issues that affect prosthetic fitting.
`208D00000X`	Occupational Therapy	Trains activities of daily living and ADL adaptations with prosthesis.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`Z89.511`	Acquired absence of right leg above knee	Represents an amputation diagnosis requiring lower-extremity prosthetic fitting when applicable to side and level.
`Z89.512`	Acquired absence of left leg above knee	Represents contralateral above-knee amputation diagnosis relevant to prosthetic prescription.
`Z89.611`	Acquired absence of right leg below knee	Common indication for a transtibial prosthesis incorporating multi-axial ankle and dynamic foot.
`Z89.612`	Acquired absence of left leg below knee	Left-sided transtibial amputation diagnosis relevant for `L5979`.
`T82.8XXA`	Other complications of prosthetic devices, implants and grafts, initial encounter	Used when documenting complications that affect prosthetic fit or function during initial management.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic management and training, initial encounter; fitting and training on use of prosthesis, lower extremity	Used for initial training and education after delivery of `L5979` prosthesis.
`97763`	Orthotic/prosthetic management and training, subsequent encounter	Used for follow-up gait training, adjustments, and functional progression after initial fitting.
`97001`	Physical therapy evaluation	Performed prior to or during prosthetic fitting to document functional status and plan therapy.
`97750`	Physical performance test or measurement	Used to document baseline and post-fitting functional outcome measures (timed walk, balance).
`99070`	Supplies and materials provided by the physician over and above those usually included	Used when additional supplies for fitting, padding, or liners are provided that are not included in the prosthesis fee.

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