· About Quantum

Care built around a life without limitations.

Quantum Prosthetics & Orthotics was founded to bring a more compassionate, personalized, and technically advanced approach to limb loss and mobility care.

Our founder

Quantum was founded by Vikram Choudhary, CPO/LPO, who grew up in Kashmir, where he witnessed firsthand the devastating effects of limb loss — and the pressing need for more compassionate, personalized care. With more than two decades in the field, training that spans the All India Institute of Physical Medicine & Rehabilitation and clinical work in Australia, and experience across leading O&P organizations, Vikram built Quantum to help people live a life without limitations.

A growing family of clinics

Quantum has grown into a family of clinics across three states. In 2024, Quantum welcomed Northern Prosthetics & Orthopedic of Rockford into the group, and our Nevada clinics operate as Advanced Prosthetics & Orthotics. Together, our practices hold a 4.6–5.0 rating across hundreds of patient reviews — different names in different communities, one standard of care.

Working with leading surgeons

We collaborate closely with surgeons on advanced techniques such as targeted muscle reinnervation (TMR), including the work of Dr. Edgardo R. Rodriguez-Collazo and Dr. Gregory Dumanian, to give patients the best possible foundation for an advanced prosthesis.

As seen on

ABC7 Chicago · NBC 5 · Telemundo · The Seattle Times · NWI Times · WISN — and more. See our news & media.

Book a free consultation☎ 312.300.4472
07 Our work in motion

Real people, moving on their own terms.

A look at the patients, fittings, and technology behind Quantum — from first cast to back on the road.

Patients and the Quantum team together at the clinic.
Patients and the Quantum team together at the clinic
A microprocessor knee in everyday life.
A microprocessor knee in everyday life
A C-Brace stance-control orthosis in everyday life.
A C-Brace stance-control orthosis in everyday life
A patient with a Quantum clinician.
A patient with a Quantum clinician
A RevoFit adjustable prosthetic socket.
A RevoFit adjustable prosthetic socket
An Infinite Socket adjustable prosthetic system.
An Infinite Socket adjustable prosthetic system
A multi-articulating prosthetic hand.
A multi-articulating prosthetic hand
Patients and staff at Quantum Prosthetics & Orthotics.
Patients and staff at Quantum Prosthetics & Orthotics
An older bulky socket beside a modern adjustable socket.
An older bulky socket beside a modern adjustable socket
The Quantum Prosthetics & Orthotics team.
The Quantum Prosthetics & Orthotics team
★★★★★

“I took my first steps here after I lost both my legs. Vikram and his team treat you like family, not a chart.”

Verified Google review · Justice, IL
★★★★★

“The best treatment I’ve had in 44 years as an amputee. I wish I’d had this support when I was new to it.”

Verified Google review · Justice, IL
★★★★★

“A below-knee double amputee since 1992 — the comfort and energy return here are the best of the best.”

Verified Google review · Las Vegas, NV
ABC7 ChicagoNBC 5TelemundoThe Seattle TimesNWI TimesWISN