Summary & Overview
HCPCS E1811: Static Progressive Stretch Knee Device, Extension/Flexion
HCPCS Level II code E1811 identifies a static progressive stretch / patient-actualized serial stretch knee device for extension and/or flexion, including all components and accessories. These devices are used to improve knee range of motion for patients with stiffness or contractures following injury, surgery, or chronic conditions. Nationally, coverage and utilization of such durable medical equipment affect rehabilitation outcomes and post-acute care pathways.
Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what E1811 represents clinically, common sites of service, and the service type. The publication summarizes payer coverage patterns and benchmarking where available, highlights policy updates that influence claims processing and documentation expectations, and situates the device in clinical care pathways for knee range-of-motion management.
This summary provides clinicians, billing staff, and policy analysts with clear reference material on the code meaning, expected settings for use, and the areas of administrative focus such as documentation and medical necessity considerations. Data not available in the input will be identified in targeted sections of the full publication.
Billing Code Overview
HCPCS Level II code E1811 describes a static progressive stretch / patient actualized serial stretch knee device designed to provide extension and/or flexion therapy. The device includes all components and accessories and may be adjusted for range of motion as needed. This device is intended to assist patients with knee contractures, stiffness, or limited range of motion through controlled, progressive stretching.
Service Type: Durable medical equipment — therapeutic knee range-of-motion device
Typical Site of Service: Outpatient clinics, physical therapy centers, and patient homes
Clinical & Coding Specifications
Clinical Context
A patient with post-operative knee stiffness following total knee arthroplasty presents to outpatient orthopedics and physical therapy for progressive loss of flexion and/or extension. The orthopedic surgeon assesses the range of motion deficits and documents that a static progressive stretch/patient actualized serial stretch knee device is indicated to regain joint mobility. The device E1811 is fitted in clinic or provided via a DME supplier; instruction on home use, progressive tensioning, and skin checks is given. Follow-up visits occur every 1–2 weeks to document range of motion gains, device adjustments, and to determine continued need. Typical clinical workflow includes evaluation by an orthopedic surgeon or physical therapist, order for the device, delivery and fitting by a durable medical equipment supplier, and periodic physician or therapist progress notes to support ongoing coverage and potential device modifications.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when documentation justifies substantially greater work or complexity related to device fitting or additional time for education/complexity. |
52 |