Now Fitting Bionic Arms in Chicago: Meet Jonah Rhymer, Certified Prosthetist

24th October 2025

At the Open Bionics clinic in Chicago, IL, Jonah uses his technical skills and a gift for listening to help his patients feel seen and understood.

Jonah started on the bench as a fabrication tech, logging more than a thousand lab hours before earning his degree at Northwestern University. “Taking things apart and figuring out how they work has always been my thing,” he said. “That background helps me translate what a patient feels into precise modifications that improve comfort and function.”

Originally from Illinois, Jonah later moved to Indonesia for 11 years. “I was around many cultures and languages,” he said. “Adapting to each person’s needs comes naturally.”

Jonah’s approach to patient care starts with education and clear expectations. “Every person is different, so I explain what our devices can do, where the limits are, and what success will look like,” he said. “By delivery, there should be no surprises.” He keeps visits welcoming, especially for kids. “We put on music. I let them choose the playlist. I show families the lab and share photos or short videos so they feel part of the process.”

His lab experience shapes the fit. “I know how a small change on the mold translates to pressure relief on the limb,” Jonah explained. “Comfort drives wear time, and wear time drives results.”

Insurance claims are handled with honesty and follow-through. “Hero devices are high-value, which makes insurance approvals a detailed process.” he said. “I prepare patients for that and tell them not to panic. I plan every case as if we will appeal, document daily function, cite research, and show why coverage supports independence and reduces overuse on the sound parts of the body.”

Jonah often reminds new users that a myoelectric hand usually acts as a helper. “It stabilizes and supports your sound side so you can do more with less strain,” he said. “Success can be using it for specific activities that matter to you, not necessarily wearing it all day.”

Although based in Chicago, Jonah routinely sees people who travel from all over Illinois, Indiana, Michigan, Wisconsin, Iowa, Missouri, Kansas, Minnesota, and Ohio. Locally, resources are strong, from adaptive sports to world-class rehab programs. “If you want to get involved with a different community, Chicago has options,” he said. “My job is to make sure your prosthetic supports the activities you care about.”

A first visit to his clinic will focus on goals, daily routines, and coverage, followed by evaluation, test fittings, and in-depth training. Jonah is proactive about logistics so travelling to his clinic is as painless as possible. He understands that downtown parking can be expensive, and he offers guidance and validation options in advance. The clinic is on the eighth floor, and the building doors are locked, so patients text or call on arrival. He sends day-before and day-of messages with directions and quick tips. “I never want parking or access to be the stressful part,” he said.

What keeps him motivated is simple. “My goal is for every patient to leave with the most comfortable socket they have ever worn and the knowledge to use it well,” Jonah said. “If something is not working, I want them to reach out so we can fix it together. I am a clinician, not a salesperson, and I want people to feel they can trust me.”

The Open Bionics Chicago clinic provides personalized fittings and demonstrations of advanced bionic technology. Appointments are free. Every device is custom-built and backed by a three-year warranty.

Book your free consultation at the Open Bionics Chicago clinic and discover how personalized prosthetic care can support your goals.