Gregory Warner, DO

Gregory Warner, DO

Infectious Disease
Accepting new patients

New Patient

Infectious Disease Specialist Profile

Before I went to medical school, I earned my master's degree in public health and was an epidemiology expert for the Los Angeles County Department. I became fascinated with monitoring and tracking diseases. When I finished medical school and started my residency, I studied epidemiology. What I like most about this field is that you can create cures for people and help them live better lives.

Hearing patient stories is my favorite part of my day. I like hearing about where they've traveled to, what they do for a living and how they might've gotten exposed to the bacteria. I like learning about people.

I'm a great listener, I'm vigilant, and I'm persistent. You have to have all these qualities to get the right information from a patient. I'm easily accessible and patients feel comfortable talking to me. There's no judgment at my office. Sometimes, a patient will have to reveal a lot of intimate details to me about their situation, so I can make sure we get them the right diagnosis and treatment. That's why it's important to establish trust and comfort with a patient early on.

When I know that the intervention I've provided for a patient has made a significant impact in their well-being - that's an extremely satisfying feeling. When a patient leaves my office, I want them to feel comforted that they got the right information from me and they are going to get the best level of care.

I treat teenagers up to 90-year-olds. The most common problems I treat are: complicated diabetic foot infections, pneumonia or urinary tract infections. I see a large number of patients in the intensive care unit and I also have a growing HIV practice.

In addition to English, I am fluent in Armenian and medical Spanish.

I have two daughters at home and love seeing them grow up. We spend a lot of time hiking and camping outdoors together.


1010 Nut Tree Road
Suite 100
Vacaville, California

Medical Degree, Western University of Health Sciences, Pomona, CA. Internship and Residency, UC Irvine Medical Center (Orange, CA), Long Beach VA Hospital, and Long Beach Memorial Medical Center, Long Beach, CA Fellowship, Los Angeles County/USC Medical Center, Los Angeles, CA

  • Board Certified in Infectious Diseases
  • Board Certified in Internal Medicine
Languages Spoken:

  • Armenian,English,Spanish