Internal Medicine

Thompson Health Canandaigua Medical Group

 Part of F.F. Thompson Hospital 

Internists are experts in adult medicine and care for the whole patient. They solve problems with chronic and multiple illnesses no matter how simple or complex. Of all primary care physicians, the “doctors of internal medicine” (also called “internists”) are unique in their focus on adult medicine. They bring to patients an understanding of wellness (disease prevention and the promotion of health), women’s health, substance abuse, mental health, as well as effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs. They are specially trained to solve complicated diagnostic problems. They handle severe chronic illnesses and situations where several different illnesses may strike at the same time.

When other medical specialists, such as surgeons or obstetricians, are involved, they coordinate their care for the patients and manage difficult medical problems associated with that care.

Office Location:
335 Parrish Street
Canandaigua, NY 14424

Phone Number:

Office Hours:
Monday: 8 am - 5 pm
Tuesday - Friday: 8 am - 5:30 pm

Internal Medicine Providers:

Douglas Alling, MD
Kipling Goh, MD
Marlys Howarth, DO
Michael Mitchko, MD
Katherine Gaffney, FNP
Sarah Russell, FNP-C
Rachel Reed, PA

What is a Physician's Assistant (PA)?
What is a Nurse Practitioner (NP)?

If you need Urgent Care
If you have an urgent health care need outside of our office hours that can't wait for the next business day, then you may consider visiting a nearby Urgent Care Center
Accepting New Patients

The following practices are accepting new patients.

Please print out our Patient Registration Form (pdf), fill it out and bring it with you.

We Are Now Open in Our New Building

Please note some of the direct physician lines have changed so please call the department phone number below to reach your physician. 

Main Number: (585) 393-2888
Internal Medicine (585) 393-2811
OB-GYN (585) 393-2800
Pediatrics (585) 393-2860
Lab Draw Station: (585) 393-2810