Internal Medicine in Jamestown, NY - Find a UPMC Provider
Internal Medicine • Jamestown, NY
Clinic Type
Internal Medicine
Address
15 South Main Street, Suite 150, Jamestown, NY 14701
Phone
716-483-0113
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Opening Hours
Not published — contact the clinic to confirm hours.
Emergency Care
For medical emergency, call 911 or go to the nearest emergency department.
Services Offered
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Insurance & Payment
Languages Spoken
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Social Media
Photos
What Patients Say
Overall sentiment across review platforms: mixed
- UPMC Provider Portal (Dr. Evadne C. Ong): 4.9/5 (394 ratings, 121 reviews)
- Birdeye (Dr. Evadne C. Ong): 4.0/5 (13 reviews)
- UPMC Provider Portal (Dr. John M. Lamancuso): 4.9/5 (481 ratings, 89 reviews)
- Healthgrades/Vitals (Dr. John M. Lamancuso): 3.0 to 3.9/5 (2 to 8 reviews)
- US News Hospital Patient Experience Score (UPMC Chautauqua): 3/5 (N/A)
Patients praise
- Strong professional reputations for long-standing local internists
- Patients describe providers as thorough, knowledgeable, and caring in many instances
- High ratings on official UPMC provider portals for major practitioners
- Long-term patient relationships spanning decades
Common complaints
- Condescending communication style reported by some patients
- Concerns about nursing staff phone etiquette and lack of tact
- Reports of rushed appointments and dismissive attitudes toward mental health or younger patients
- Hospital-level patient experience ratings lower than national averages
"Dr. LaMancuso is a very professional, and caring doctor. He takes pride in his work and listens to the concerns of his patients. I highly recommend Dr. LaMancuso as a physician."
— UPMC Provider Portal Review"Recently had to speak with a nurse via phone. Whomever nurse I spoke with phone skills were sub-par. No tact whatsoever. Been going to Dr. Ong for a few years and would like to continue, but she needs to check her boisterous nurse's phone skills."
— Birdeye Review"This guy will not care about you if you are under the age of 50. Acts like mental health is not a serious issue. Never took me seriously."
— Healthgrades ReviewSynthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].
Information sourced from the clinic's website as of July 11, 2026.
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