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OSF Medical Group - Diabetes & Endocrinology in Alton

EndocrinologyAlton, IL

★★★★☆3.7/518 reviews across 2 platforms

Ratings by platform

  • Birdeye: 3 out of 5 stars (8 reviews)
  • Vitals (for Dr. Wonil Tae): 4.3 out of 5 stars (10 ratings with 2 written reviews)

What patients say

Patients praise

  • Physicians described as professional, competent, and prompt
  • Staff noted as courteous in specific experiences
  • Doctors praised for taking time for research and not guessing

Common complaints

  • Difficulty reaching office staff via phone
  • Lack of follow-up on medical concerns or referrals
  • Reports of rude or unprofessional behavior by administrative staff
  • Concerns regarding appointment scheduling and strict grace periods

In patients' words

"I have been most fortunate to have his abilities and caring attitude available to me at such a trying time. He is professional, competent, prompt and courteous. Probably one of the most important traits of Dr Tae is that he takes the time for research rather than guess as some physicians do."

Vitals review for Dr. Wonil Tae

"We have left over 30 calls the last week and no answer or response from the office. Our child has severe special needs and the medication he has been on was slightly changed... and since we were referred to... we had to have..."

Healthgrades review regarding OSF medical staff experience

How these reviews were compiled

Synthesized from public patient-review platforms as of Jul 11, 2026 — sources: [1][2][3][4][5][6][7][8].

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