Internal Medicine in Jamestown, NY - Find a UPMC Provider

Internal Medicine • Jamestown, NY

Home/Jamestown/Internal Medicine/Internal Medicine in Jamestown, NY - Find a UPMC Provider

About

Book appointment Call clinic Visit website

Clinic Type

Internal Medicine

Address

15 South Main Street, Suite 150, Jamestown, NY 14701

Phone

716-483-0113

Email

—

Opening Hours

Not published — contact the clinic to confirm hours.

Website

https://providers.upmc.com/specialty/Internal%20Medicine/near/Jamestown%2C%20NY?page=1

Emergency Care

For medical emergency, call 911 or go to the nearest emergency department.

Services Offered

—

Insurance & Payment

UPMC Health Plan
UPMC/Great Lakes Internal Medicine?
insurance not specified in text

Languages Spoken

—

Social Media

Facebook Linkedin Instagram

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 Review

Synthesized 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. Own this clinic? Claim or correct this listing.