Ermi

What Ermi does

Ermi (Ermi LLC, founded 1992 in Atlanta, GA by orthopedic surgeon and research scientist Thomas Paul Branch, MD) designs, manufactures, and distributes FDA-registered Class I durable medical devices for the non-surgical treatment of severe joint motion loss (joint contractures / arthrofibrosis). Its core technology centers on patented hydraulic and pneumatic stretching mechanisms in the Flexionater and Extensionater product lines, which apply controlled, high-intensity load to patients' joints at home; the company explicitly markets these as capable of performing all major physical therapy stretch procedures (HLBS, SPS, PNF, LLPS, and Patient Actuated Serial Stretch / PASS) at therapist-level forces. The portfolio spans eight body-part-specific device variants (Shoulder, Knee, Knee Flexionater+, Elbow Flexionater+/Extensionater, Ankle Flexionater+, Forearm Flexionater+, Great Toe/MPJ) plus the Therminater thermoelectric ice-free cold/heat therapy unit and a Shoulder Internal Rotation Adaptor Kit.

Ermi sells and rents devices through a U.S.-domestic enterprise field sales motion: territory representatives cultivate orthopedic surgeon and physical therapist prescribers, deliver and set up devices in patients' homes, and coordinate with case managers. Reimbursement is processed across Workers' Compensation, Veterans' Affairs, Commercial Insurance, and Medicare as standard DME billing. The company supports its devices with clinical staff monitoring, patient education, and a smartphone app for progress documentation. Indicative outcomes reported by the company include ~30° average knee flexion gains in under eight weeks, 97% of shoulder patients avoiding additional surgery for adhesive capsulitis, and ~$9,000 in per-patient savings versus low-intensity therapy, across a cumulative base of 150,000+ treated patients with zero reported complications.

Ermi is privately held, founder-owned by Dr. Branch (President and CEO), with no disclosed venture capital, private equity, or institutional funding history; it operates with 101–250 employees and holds FDA Class I registration, Joint Commission Accreditation, and HIPAA-aligned systems. Public-facing marketing is heavily evidence-based, drawing on peer-reviewed studies (e.g., Stinton 2022 in Journal of Orthopaedic Surgery and Research and Orthopaedic Nursing) and named patient testimonials spanning professional athletes, military veterans, and civilians.

Name

Ermi

Legal name

Ermi LLC

Website

https://ermi-motion.com

Company type

Private

Founded year

1992

Operating status

Operating

Headcount range

101–250 employees

Short description

Ermi (Ermi LLC) designs, manufactures, and distributes FDA-registered Class I medical devices — including Flexionater, Extensionater, and Therminater lines — that deliver high-intensity, home-based mechanical stretch and thermal therapy to treat severe joint motion loss, serving post-surgical and injured patients across Workers' Compensation, VA, Commercial, and Medicare payors.

Ownership category

akta.pro rank

Product category

Orthopedic Rehabilitation Medical Devices

NAICS

Surgical Appliance and Supplies Manufacturing (339113), Electromedical and Electrotherapeutic Apparatus Manufacturing (334510), Home Health Equipment Rental (532283)

SIC

Orthopedic, Prosthetic & Surgical Appliances & Supplies (3842), Electromedical & Electrotherapeutic Apparatus (3845)

akta.pro primary industry

Rehabilitation Therapy Equipment (PT/OT Modalities, Exercise & Balance Devices) (HLAHAMAG)

akta.pro secondary industries

Sports & Active Rehabilitation Devices (Adaptive Sports Mobility, Performance Prosthetics) (HLAHAMAJ), Durable Medical Equipment (DME) Sales & Rentals (HSABAKAA), Assistive Technology, Adaptive Equipment & Home Exercise Program Training In-Home (HSABADAN)

Keywords

• Joint contracture therapy
• Motion restoration devices
• Durable medical equipment
• Orthopedic rehabilitation devices
• Post-surgical stretch therapy

Headquarters

HQ city

Atlanta

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Durable Medical Equipment Sales: Sale/rental of FDA-registered Class I medical devices for home use, prescribed by licensed healthcare providers. Devices include Flexionater and Extensionater product lines for various joints.
2. Insurance Reimbursement: Revenue from insurance carriers, third-party administrators, Workers' Compensation, Veterans' Affairs, Commercial Insurance, and Medicare populations through standard DME billing practices.
3. Professional Support Services: Ermi representatives provide device setup, home delivery, patient instruction, progress monitoring, and care coordination with physicians and physical therapists throughout recovery.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Ermi designs, manufactures, and distributes FDA-registered Class I medical devices (the Flexionater and Extensionater product families, plus the Therminater cold/heat unit) for non-surgical treatment of joint contractures and post-surgical/injury motion loss. Devices are prescribed by licensed healthcare providers, rented or sold as durable medical equipment, delivered to patients' homes, and supported through insurance reimbursement, physician/therapist coordination, and ongoing progress monitoring.

Product overview

Ermi offers a portfolio of non-surgical motion restoration medical devices designed to treat joint contractures and motion loss across multiple body parts. The core portfolio centers on the Flexionater and Extensionater device lines, including Shoulder, Knee, Elbow, Ankle, Forearm, and Great Toe variants, all using patented hydraulic or pneumatic air bladder technology to deliver high-intensity controlled stretching. The Knee Flexionater+ combines flexion and extension capabilities in one device. The Therminater provides complementary cold and heat therapy. An Internal Rotation Adaptor Kit is available as an add-on for shoulder treatment. All devices are FDA-registered Class I medical devices intended for home use under physician prescription, supported by Ermi professionals who assist with setup, monitoring, and insurance coordination.

Differentiator

Problem solved

Functional benefit

Brands

• Flexionater: High-intensity stretch assist devices for knee, shoulder, elbow, ankle, and forearm motion restoration using patented hydraulic mechanism.
• Extensionater
• Therminater

Products and services

• Shoulder Flexionater High-intensity stretch device that increases motion for patients with restricted external rotation, abduction, flexion, and internal rotation of the shoulder joint; designed for home use as an adjunct to physical therapy following rotator cuff repair or adhesive capsulitis.
• Knee Flexionater High-intensity knee flexion device that generates loads up to several hundred foot-pounds of torque to restore knee motion and reduce reoperation rates following knee injury or surgery.
• Knee Extensionater Portable device using patented pneumatic air bladder technology that creates overpressure to treat knee extension loss and address pain and dysfunction in the knee, hips, and lower back.
• Knee Flexionater+ Enhanced knee device combining both flexion and extension therapy in a single unit using a patented hydraulic mechanism, allowing patients to switch from working flexion to working extension within the same session.
• Elbow Flexionater+ Device providing flexion and extension therapy with a patented hydraulic mechanism for high-intensity controlled stretch, allowing patients to stretch in both pronated and supinated anatomical positions.
• Elbow Extensionater Elbow device using three-point bending principle with patented pneumatic air bladder technology to improve elbow extension while allowing perfect forearm alignment.
• Ankle Flexionater+ Non-motorized home rehab device allowing ankle stretching into dorsiflexion and plantar flexion via a patented hydraulic mechanism, supporting both straight and bent knee positions to target Gastrocnemius and Soleus muscles.
• MPJ Extensionater Device engineered to promote both extension and flexion of the metatarsophalangeal joint by recreating natural foot and toe positioning during walking, using patented air bladder technology.
• Forearm Flexionater+ All-in-one device addressing forearm pronation and supination, wrist radial and ulnar deviation, and wrist flexion and extension using patented hydraulic mechanism, accommodating both straight and bent elbow positions.
• Therminater Thermoelectric cold and heat therapy device providing cooling and heating without ice, offering targeted localized non-opioid therapy with consistent temperature management between 46 to 118 degrees Fahrenheit for pain and swelling reduction.

Quantifiable outcome

• 90%+ of patients avoid motion restoring surgery when using Ermi devices for 2 months
• +7 more outcomes

Named customers8 records

Segments5 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Dynasplint Systems: Direct competitor manufacturing low-intensity dynamic splinting devices for joint contracture treatment, explicitly named by Ermi as a benchmark. Same patient population, same indication, and same orthopedic/PT referral channel.
• Joint Active Systems: Manufacturer of turnbuckle/worm-gear static progressive splints for joint contracture treatment. Competes with Ermi's Extensionater line in the same post-surgical rehabilitation use case.

Emerging players

• Saebo: Specializes in upper-extremity neurological rehabilitation devices (stroke and injury), with overlap in forearm/wrist/shoulder contracture use cases but a focus on neurological rather than post-surgical orthopedic patients.
• Lite Run: Emerging rehabilitation technology company providing assistive mobility devices for gait and lower-extremity therapy. Adjacent in orthopedic rehabilitation but focused on ambulation rather than joint contracture.

Broad incumbents

• Breg: Broad orthopedic bracing and DME portfolio serving the same orthopedic surgeon and physical therapist channels as Ermi, though focused on braces, cold therapy, and post-op supports rather than high-intensity stretch devices.
• Enovis (formerly DJO Global / Colfax Medical): Large diversified orthopedic and rehab device manufacturer covering braces, recovery, and surgical implants. Provides broad competition in orthopedic DME channels and has the scale to bundle competing solutions with payors.
• Ossur: Global orthopedic player with significant bracing and prosthetics portfolio. Competes in adjacent orthopedic rehabilitation categories and serves many of the same orthopedic surgeon customers.
• Stryker: Large-cap orthopedic and surgical device incumbent whose post-operative rehabilitation and DME footprint intersects with Ermi's surgeon-driven channel; competes indirectly via bundled surgical solutions.
• Zimmer Biomet: Major orthopedic implant and reconstruction company whose hip/knee/shoulder surgical volumes generate the patient population Ermi serves post-operatively; potential partner-or-competitor depending on channel strategy.

Regional players

• Daiya Industry (Stretch-Relief / Dynacontracture devices in Japan): Japanese manufacturer of joint contracture and rehabilitation devices with overlapping patient indications; comparable functionally but operates primarily outside Ermi's U.S. footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/ermi-llc.

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Ermi