COVID-19 NOTICE! - Due to the recent COVID-19 Pandemic we are primarily operating through Telemed/Video visits online.  You can contact our office via phone 951-303-6158 or email contact@drgisi.com.  We also encourage you to sign up on our patient portal via the link on this page or email us at back-office@drgisi.com for assistance. We also have links at the bottom of each page to order products from Xymogen or Metagenics. We are offering a 10% discount for each order

Office Hours

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday & Sunday
9:00am – 5:00 pm
8:00am – 5:00 pm
8:00am – 5:00 pm
8:00am – 5:00 pm
9:00am – 12:00pm
CLOSED
*Closed for lunch between 12:00 & 2:00 pm

Schedule an Appointment


There are two ways to schedule an appointment.
  1. Call our clinic 951.303.6158
  2. Request an appointment online

Please note: Requesting and appointment online does not guarantee you an appointment. We will be in touch with you to set up a definite date and time.

Online Appointment Request

Fields marked with * are required

Captcha Image Reload image challenge

Dr. Sylvia A. Gisi

Dr. Sylvia A. Gisi M.D. is very dedicated to her patients and looks forward to seeing them through their medical challenges. Dr. Gisi believes in utilizing nutritional supplements as a first line therapy, while realizing certain medications can also be used effectively to treat many diseases.

Read More