Summary & Overview

HCPCS L6722: Heavy-Duty Mechanical Voluntary-Closing Terminal Device

HCPCS Level II code L6722 denotes a heavy-duty, mechanical, voluntary-closing terminal device (hook or hand) used as part of an upper-limb prosthesis. This durable medical equipment code is nationally relevant because it captures billing for robust prosthetic terminal devices used by patients with higher activity or work demands, impacting prosthetic coverage, utilization, and specialty supplier workflows across payers. Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will find a concise explanation of the device and its clinical role, payer coverage patterns and benchmark context, typical sites of service where the device is evaluated and fitted, and common billing considerations tied to HCPCS Level II coding. The publication also outlines associated modifiers and common billing practice elements, where available, and highlights areas where policy updates or prior authorization protocols may influence access and reimbursement. Data not available in the input is noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareL6722HCPCS Level IIprostheticsterminal deviceupper-limb prosthesisdurable medical equipmentvoluntary closingmechanical hook

Billing Code Overview

HCPCS Level II code L6722 describes a terminal device, hook or hand, heavy duty, mechanical, voluntary closing, made of any material and available in any size, lined or unlined. This code covers a prosthetic terminal device intended to provide grasping or hooking function for patients requiring an upper-limb prosthesis.

Service type: Prosthetic upper-limb terminal device, heavy-duty mechanical, voluntary closing
Typical site of service: Durable medical equipment suppliers, prosthetics clinics, outpatient rehabilitation centers, and other settings where prosthetic devices are evaluated, fitted, and dispensed

Clinical & Coding Specifications

Clinical Context

A 42-year-old right-hand dominant construction worker with a traumatic transradial amputation elects to receive a heavy-duty voluntary-closing terminal device (hook or hand) to restore basic prehension for activities of daily living and work tasks. The prosthetist evaluates limb volume, residual limb shape, skin integrity, and activity demands in an outpatient prosthetics clinic. Measurements and component selection occur during the initial fitting visit. The device (L6722) is ordered, fabricated or configured to the patient’s socket and terminal device adapter, and delivered at a follow-up fitting appointment. The clinical workflow includes prosthetic assessment, device ordering with supporting documentation of functional need, delivery and fit checks, patient training for donning/doffing and device control, and routine follow-up for adjustments and maintenance. Typical sites of service are outpatient prosthetics clinics, prosthetic manufacturer facilities, and hospital-based prosthetics departments. Return visits address pressure points, alignment, component replacement, or activity-related repairs.

Coding Specifications

Modifier	Description	When to Use
`NU`	New equipment	Use when the terminal device is furnished as initial or replacement new equipment (first time provided to the beneficiary for this amputation level).
`RR`	Rental equipment	Use when the item is furnished on a rental basis rather than purchased.
`UE`	Left upper extremity	Use to indicate the device is for the patient’s left upper extremity.
`UF`	Right upper extremity	Data not available in the input.
`QK`	Service furnished in part by a qualified physical therapist	Use when a qualified therapist provided part of the fitting/training service (where payer allows).
`QX`	Service furnished by a physical therapist in private practice with an assistant	Use when both therapist and assistant were involved, per payer policy.
`QY`	Medical necessity certification by a non-physician practitioner	Use when an applicable non-physician practitioner certifies medical necessity for the device.
`59`	Distinct procedural service	Data not available in the input.
`26`	Professional component	Use when reporting the professional component of a service separate from technical component (rare for DME supply billing; include if applicable in composite billing scenarios).
`TC`	Technical component	Data not available in the input.
`78`	Return to OR for related procedure	Use only if a surgical return procedure related to the prosthesis occurred (rare and only in surgical claims).
`52`	Reduced services	Use if the device or service provided was reduced from the full description documented in the order.
`53`	Discontinued procedure	Use if the delivery or fitting was discontinued after initiation.
`59`	Distinct procedural service	Data not available in the input.

Taxonomy Code	Specialty	Notes
`275400000X`	Prosthetics and Orthotics	Prosthetists who evaluate, order, fit, and deliver terminal devices.
`261QP2300X`	Physical Medicine & Rehabilitation	Physiatrists who manage limb loss, approve prosthetic prescriptions, and coordinate care.
`207R00000X`	Orthopedic Surgery	Orthopedic surgeons involved in amputation surgery and post-operative prosthetic planning.
`1730A0001X`	Occupational Therapy	Occupational therapists who provide training in terminal device use and ADL retraining.
`223W00000X`	Physical Therapy	Physical therapists who provide rehabilitative training and functional outcome measurement.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`Z89.611`	Acquired absence of right hand	Indicates an upper extremity amputation at or above wrist; supports medical necessity for a terminal device on the right side.
`Z89.612`	Acquired absence of left hand	Indicates an upper extremity amputation at or above wrist; supports medical necessity for a terminal device on the left side.
`S48.119A`	Unspecified injury of right shoulder and upper arm, initial encounter	Traumatic injuries that result in partial amputation or loss of function that may require a prosthetic terminal device.
`S48.129A`	Unspecified injury of left shoulder and upper arm, initial encounter	Same relevance for left-sided traumatic injuries leading to prosthetic need.
`T86.89`	Other complications of transplanted organ and tissue	Data not typically associated; included when complex wound or graft issues affect prosthetic fitting.
`Z96.641`	Presence of right artificial arm	Used when a patient already has an artificial arm in place; may relate to replacement of terminal device.
`Z96.642`	Presence of left artificial arm	Same relevance for left-sided devices.
`G54.0`	Brachial plexus lesions, unspecified	Neurologic deficits causing severe upper limb dysfunction where a prosthetic terminal device may be indicated.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97763`	Orthotic(s)/prosthetic(s) management and training, upper extremity, initial, with prosthetic training, 15 minutes	Used for training the patient in use of a new terminal device including donning/doffing and functional tasks during initial fitting visits.
`97762`	Orthotic(s)/prosthetic(s) management and training, upper extremity, subsequent, 15 minutes	Used for follow-up training sessions after initial delivery for ongoing skills development or adjustments.
`97750`	Physical performance test or measurement (e.g., musculoskeletal or neuromuscular)	Used when performing standardized functional assessments pre- and post-prosthetic fitting to document functional status.
`99456`	Work-related injury evaluation and management (e.g., impairment rating)	May be used when determining work capacity or documenting impairment for vocational or workers’ compensation cases associated with prosthetic provision.
`L-codes`	Durable medical equipment coding	Data not available in the input.