L3933 Finger Orthosis HCPCS Reimbursement

HCPCS Level II code L3933 denotes a custom-fabricated finger orthosis without joints, which may include a soft interface and includes fitting and adjustment. This code captures services for professionally made, patient-specific finger supports used for immobilization, protection, or positioning after injury, surgery, or for chronic conditions affecting finger function. Nationally, orthotic services coded under L3933 are relevant for post-operative care, hand therapy pathways, and durable medical equipment (DME) benefit management.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise summary of the code’s clinical purpose and typical sites of service, along with coverage context across major payers. The publication outlines common billing considerations, typical use cases in hand and upper-extremity care, and what to expect in terms of documentation and coding specificity for custom-fabricated finger orthoses.

This report provides national-level context for clinicians, billing professionals, and policy analysts: clinical indications for device use, where services are commonly delivered, payer coverage landscape, and areas where additional documentation can support medical necessity. Data not available in the input will be noted where applicable.

Billing Code Overview

HCPCS Level II code L3933 describes a finger orthosis, without joints, custom fabricated, which may include a soft interface and includes fitting and adjustment. This device is designed to provide support, protection, or positioning to a finger and is custom-made to the patient's anatomy rather than prefabricated.

Service type: Custom fabricated upper-extremity orthotic device fabrication and fitting
Typical site of service: Durable medical equipment or orthotics clinic, outpatient rehabilitation facility, or specialty hand/orthotics practice

Data not available in the input.

Clinical Context

A 45-year-old right-handed piano teacher presents to an orthotics clinic with persistent pain and reduced range of motion of the right index finger following a zone II flexor tendon repair performed 6 weeks ago. The hand therapist assesses edema, wound healing appropriate, and early tendon glide deficits with pain on function. The provider prescribes a custom-fabricated, jointless finger orthosis to support the digit, protect the repair, and provide a soft interface to improve comfort during activities and rehabilitation.

The clinical workflow includes: referral from the surgeon or hand therapist; measurement and casting or digital capture of the finger; fabrication of the custom orthosis with molding and addition of soft interfaces as needed; delivery visit for fitting, patient education, and adjustment; and follow-up visits for refitting and progressive weaning of the device. Documentation includes the order, diagnosis, objective findings (ROM, edema, wound status), fabrication details, fitting/adjustment notes, and functional goals. Billing uses HCPCS Level II code L3933 for the custom-fabricated, jointless finger orthosis, with modifier(s) appended as appropriate for laterality or other payor-specific circumstances.

Coding Specifications

Modifier	Description	When to Use
`LT`	Left side	Use when the orthosis is for the left finger/digit

Taxonomy Code	Specialty	Notes
`261QM0800X`	Orthotist/Prosthetist	Common provider who designs and fabricates custom orthoses
`207K00000X`	Occupational Therapist	Frequent clinician for fitting, functional training, and adjustments
`207L00000X`	Physical Therapist	Provides rehabilitation and may coordinate splinting/orthoses
`207P00000X`	Hand Surgeon	Orders orthosis postoperatively and provides surgical oversight

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`S56.211A`	Strain of extensor muscle, right index finger, initial encounter	Soft tissue injuries of the finger that may require protective jointless orthosis during healing
`S66.021A`	Open wound of flexor tendon of right index finger, initial encounter	Postoperative protection after tendon repair commonly requires a custom finger orthosis
`M24.441`	Recurrent dislocation, right finger	Persistent instability managed with a custom finger orthosis to limit motion and prevent redislocation
`M20.44`	Mallet finger, right hand	Tendon avulsion causing extensor mechanism deficit often treated with a finger splint/orthosis without joints
`M65.841`	Stenosing tenosynovitis, right index finger (trigger finger)	Custom orthosis may be used to limit motion and relieve tendon irritation during conservative management

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97035`	Ultrasound therapy, each 15 minutes	May be used before or during rehabilitation visits to address tendon healing and pain in patients receiving a finger orthosis
`97110`	Therapeutic exercises to develop strength and endurance, each 15 minutes	Performed by therapists during follow-up visits to improve digit range of motion while the orthosis protects repairs
`97140`	Manual therapy techniques (e.g., mobilization), each 15 minutes	Used to address soft tissue restrictions and joint mobility in conjunction with orthosis use
`97760`	Orthotic management and training, upper extremity, initial encounter	Often billed by therapists to document training, donning/doffing, and patient education related to the custom finger orthosis
`99070`	Supplies and materials, non-covered items, used during patient care	May be used to bill for additional non-covered custom materials when permitted by payor policies

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Summary & Overview

HCPCS L3933: Finger Orthosis, Custom Fabricated