Dr. Donald Weimer, M.D.

Orthopedic Surgery

Dr. Donald Weimer is a board-certified orthopedic surgeon practicing in O Fallon, Illinois. In 2023, Dr. Weimer performed 21 Medicare-verified shoulder replacements (#35 in Illinois) and 14 knee replacements (#234 in Illinois), for a combined total of 35 procedures. All counts reflect Medicare fee-for-service cases, representing approximately 33–37% of total joint replacement volume nationwide.

Verified Medicare Cases (2023)

Shoulder Replacement
21 verified cases
#35 in Illinois
Knee Replacement
14 verified cases
#234 in Illinois

Verified Case Volume Trends (2013-2024)

Questions to Ask Dr. Weimer

Medicare volume represents only a portion of a surgeon's practice.

Recommended Script:

"Dr. Weimer, I see your Medicare volume is lower—what percentage of your practice is private insurance or sports medicine? Approximately how many total joint replacements do you perform annually?"

Preparing for Surgery?

Browse recommended recovery products for shoulder replacement

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Contact & Location

📞 Phone: 618-641-5800
1512 N Green Mount Rd
O Fallon, IL 62269
NPI: 1932152980
Credentials: M.D.
✅ Active Medicare provider (NPI verified)
📅 20 years of practice experience
🎓 Licensed M.D.
🏥 Licensed surgical specialist
🦴 Board-certified orthopedic surgeon
📞 Contact information available
Important: Rankings are based solely on Medicare procedure volume and do not reflect quality of care, patient outcomes, or procedures covered by private insurance. This data represents approximately 33-37% of all joint replacement procedures nationwide (63% of Medicare fee-for-service). Always consult with healthcare providers to make informed decisions about your care.