Rochester General Medical Associates - TWIG Medical Clinic

Office Information

1425 Portland Avenue
Rochester, NY 14621
Office Phone: 585.922.4882

Office Hours

Monday, Tuesday, Wednesday

Friday 8:00 am - 5:00 pm

Thursday 9:30 am - 5:00 pm

About Rochester General Medical Associates

Rochester General Medical Associates (RGMA) is a comprehensive primary care center providing health care services to adult and geriatric patients (ages 18 or older). RGMA has two sites located on the ground floor of Rochester General Hospital where you can receive care:

  • TWIG Medical Clinic (located in the Gordon Building)
  • Outpatient Medical Department (OPD)

If you're a patient of RGMA, you will be cared for by a health care team consisting of an Attending Physician, Resident Physician, Physician Assistant or Nurse Practitioner, and a Nurse. Our Attending Physicians are board certified in Internal Medicine. The Attending Physician is the leader of your health care team and works closely with the Resident Physician to manage your care. Your Attending Physician remains your primary care provider for as long as you receive your care at RGMA.

Our practice is recognized as a Patient Center Medical Home. For more information about Patient Centered Medical Home, click here.

A nurse is available by phone Monday - Friday from 8:00 am - 4:30 pm. A physician is available 24 hours a day for emergencies.

After hours, please call the office at (585) 922-4101 and you will be connected to the Answering Service, or you may call the Answering Service directly at (585) 723-6675.


To schedule an appointment at one of our practice sites, please refer to the phone numbers below:

  • TWIG Medical Clinic: (585) 922-4882
  • Outpatient Medical Department: (585) 922-4101

If you are a NEW patient, please have your medical records forwarded to our practice before making an appointment.

IMPORTANT: Late Appointment Policy

Due to high patient volume, it is important that you arrive to your appointment on time (or early). If you are 10 minutes (or more) late, you will have to wait for the next available provider. If a provider is not available, your appointment may have to be rescheduled for a different day.

Special Considerations

Our center is staffed by full-time social workers to provide one-on-one services for our patients. Spanish and sign language interpreters are also available.

Our Providers


Beatrice Deshommes, MD
"I've become a better doctor because of the lessons my patients teach me."

Dr. Beatrice Deshommes earned her medical degree at the New York University School of Medicine and completed her residency in Internal Medicine at the University of Rochester.

generic avatar Michael Henderson, MD

Ammar Alkassm, M.D

Medical School: Weil Cornell Medical College
Residency: Rochester General Hospital, Internal Medicine, Rochester, NY
Licensures & Boards Certification: Internal Medicine.


Raba Rizvi, MD

Medical School Name: Ross University School of Medicine, Dominica, West Indies
Residency: Unity Hospital, Internal Medicine, Rochester, NY
Licensure: NY state Medical License, Board Certified in Internal Medicine
Practice Name: TWIG Medical Clinic

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Karen Mazza, NP

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Jane Sassone, MS ANP-BC

Alfred University – BSN
University of Rochester - MS
 generic avatar Evelyn Stelmach, NP
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Becky Thomas, RPA-C

Rochester Institute of Technology 1998 with honors
NYS licensed & NCCPA Board certified