“Dr. Sonntag rebuilt my knee and my confidence. I was back on the trail in months — and he never rushed a single appointment.”
Expert orthopedic care that gets you back in motion.
Dr. Jeffrey R. Sonntag delivers advanced surgical and non-surgical treatment for sports injuries, joint pain, and the active life you intend to keep living.
Comprehensive care for every joint.
State-of-the-art treatment for the injuries and conditions that keep active people sidelined.
- 3,000+
- Procedures performed*
- 15+
- Years of experience*
- 98%
- Return to activity*
- Same-week
- Appointments available

A surgeon who treats the person, not just the X-ray.
Dr. Jeffrey R. Sonntag is an orthopedic surgeon serving Northern Indiana, with a practice built on clear communication, conservative-first thinking, and outcomes that hold up over a lifetime of activity. From weekend athletes to grandparents determined to keep up, he tailors every plan to the life a patient is trying to protect.
- Fellowship-trained in sports medicine & reconstruction*
- Conservative-first — surgery only when truly needed
- Clear, jargon-free explanations at every visit
- Trusted by athletes, families & active adults

Knee & ACL Reconstruction
A torn ACL doesn't have to end your season — or your active life. Dr. Sonntag uses arthroscopic, minimally invasive technique to rebuild the knee for a confident, full-speed return.
- Minimally invasive, small-incision arthroscopy
- Graft options tailored to your sport & goals
- Structured, milestone-based return-to-play rehab

Hip & Knee Joint Replacement
When arthritis takes the joy out of moving, modern joint replacement gives it back. Dr. Sonntag's approach is designed for lasting relief, quick mobility, and a smoother recovery.
- Partial & total replacement options
- Implants engineered for durability
- Many patients walking the same day
Patients back in motion.
“He explained every option in plain language and only recommended surgery when it was truly the right call. A rare kind of doctor.”
“Two years after my hip replacement I'm hiking again with my grandkids. I cannot recommend him highly enough.”
Everything you need, in one place.
From your first visit to recovery, we make every step simple and clear.
Your First Visit
What to expect & how to prepare for your appointment.
Patient Forms
Download & complete new-patient paperwork ahead of time.
Post-Op Instructions
Recovery guidance to help you heal safely and fully.
Insurance Info
Most major plans accepted & verified before your visit.
Not sure about your diagnosis — or a recommended surgery?
A second opinion is one of the smartest steps a patient can take. Dr. Sonntag reviews your imaging, examines you independently, and gives you a clear, honest assessment — with no pressure to proceed in any direction.
Whether you've been told you need surgery and aren't sure, or you've tried treatment that hasn't worked, these consultations are welcomed.
Let's get you moving again.
Request a consultation and Dr. Sonntag's team will be in touch — typically within one business day. Most major insurance accepted.
