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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.

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

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • UPMC Provider Portal (Dr. Evadne C. Ong): 4.9/5
  • 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.

More internal medicine clinics in Jamestown

Jamestown, NY·Internal Medicine

FHMS Jamestown, NY Offices - Family Health Medical Services, PLLC (FHMS) is a private medical practice providing primary care to families in Western New York for 40+ years. - Headquarters and key Jamestown locations: - 103 Allen St, Jamestown, NY 14701 (HQ) - 31 Sherman St, Suite 2200 & 2600, Jamestown, NY 14701 - Other NY offices in the FHMS Jamestown area include: - 216 E Main St, Westfield, NY 14787 - 95 East Chautauqua Street, Mayville, NY 14757 - 95 E Chautauqua St, Mayville, NY 14757 - Quick facts: - Industry: Medical Practices; Type: Partnership - Founded: 1982; Headquarters: Jamestown, NY - 7 offices across the United States (7 in NY region listed above) - Contact: main phone lines include (716) 326-3240 and (716) 484-4033 If you need driving directions, specific office hours, or to schedule an appointment, I can look up the exact contact details for a Jamestown location or provide link to the FHMS location page.

VerifiedOnline bookingSince 1982
Jamestown, NY·Internal Medicine

Summary: Jamestown Area Medical Associates is part of the GLPP-Great Lakes Physician Practice network, a private, non-profit? (Privately held) group in the Hospitals and Health Care industry. Based in Jamestown, NY, GLPP consolidates primary care and specialty services across multiple Jamestown-area providers, including Jamestown Area Medical Associates, and coordinates with local hospitals to deliver integrated care. GLPP operates from its Jamestown headquarters and other locations in Chautauqua County, with ~4 offices in the United States. Contact numbers include 833-444-4577 and 716-488-1877.

Verified

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