Summary & Overview
HCPCS L4370: Pneumatic Full Leg Splint, Prefabricated, Off-the-Shelf
HCPCS Level II code L4370 represents a prefabricated, off-the-shelf pneumatic full leg splint used to immobilize and support the entire lower extremity. The code captures provision of a premanufactured pneumatic device indicated for acute immobilization after trauma or to support the limb when definitive casting or surgical fixation is delayed. Nationally, this code matters because pneumatically adjustable splints are commonly used across emergency, hospital inpatient, and outpatient settings and can affect durable medical equipment (DME) utilization, inventory, and billing practices.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for use, typical sites of service, and the structure of the code in HCPCS Level II. The publication provides benchmarks and billing guidance context where available, summaries of common modifiers and coding considerations, and notes on payer coverage patterns and documentation expectations. It also outlines gaps where input data is not available and directs readers to the specific sections for reimbursement benchmarks, prior authorization trends, and coding compliance issues. This summary is written for a national audience and focuses on the role of L4370 in DME-related workflows and billing operations.
Billing Code Overview
HCPCS Level II code L4370 describes a pneumatic full leg splint, prefabricated, off-the-shelf. The device is a prefabricated pneumatic splint designed to immobilize and support the entire lower extremity from thigh to ankle using air-filled chambers or bladders.
Service type: Durable Medical Equipment (DME) – external orthopedic support.
Typical site of service: Emergency department, outpatient clinic, urgent care, or inpatient hospital settings where immediate immobilization of the lower extremity is required.
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 62-year-old ambulatory patient presents to the orthopedic or urgent care clinic after a ground-level fall with acute right lower-extremity pain, swelling, and limited weight-bearing. Examination and plain radiographs show a nondisplaced tibial plateau fracture and significant soft-tissue swelling making immediate casting inadvisable. The clinician applies a pneumatic full leg splint (L4370) off-the-shelf to immobilize the entire lower extremity from thigh to ankle, control pain and swelling, and permit safe transport or outpatient follow-up. The typical clinical workflow includes: initial assessment and neurovascular exam, imaging (X-ray), measurement for appropriate splint size, application and inflation/adjustment of the pneumatic splint, documentation of splint type and laterality (use modifier LT or RT), patient instruction on weight-bearing restrictions and follow-up, and billing the device as a durable medical equipment supply dispensed in clinic or provided at an outpatient orthopedics/urgent care setting. Typical sites of service: hospital outpatient clinic, emergency department, urgent care, or orthopedic clinic. Typical patient scenario: acute traumatic lower-extremity injury requiring temporary immobilization when a prefabricated pneumatic full leg splint is clinically indicated to manage fracture, severe soft-tissue injury, or post-reduction stabilization prior to definitive treatment.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|