Welcome to Grossman & Grossman, M.D.s

About Us

Our Health Mission

Our mission is to provide top quality health care in a compassionate manner, always informing and working together with patients who partner with us in managing their own health care.

Experience and Professionalism

Grossman & Grossman MD's was formed in the 1980's by Drs Hannah and Robert Grossman who are board certified, husband and wife ob/gyn's. For a few years Dr Hannah worked half time as the chief medical officer at Los Robles Hospital and half time in private practice. In 2014 Dr Hannah changed to be a full time chief medical officer at Los Robles Hospital and is not regularly in the private practice. She still works with Dr Robert  in surgery including cesarean sections. 

Dr Robert grew up in Los Angeles.

He has been married to Dr Hannah for more than 35 years and has 4 great kids and usually a couple of dogs.

He went to Univ of Calif Berkeley for undergraduate and then Univ of Southern So Calif medical school.

Dr Robert initially started in general surgery and did almost 2 years before switching to ob/gyn.  He and Dr Hannah did their ob/gyn training at Univ of Tennessee.  They worked at Kaiser and then started private practice.

Dr Robert has been an active participant in hospital affairs.

He was chief of staff at Westlake Hospital and Thousand Oaks Surgery Hospital. He has been chief of ob/gyn multiple times at Los Robles Hospital.

His hobbies are playing piano, making wine, skiing, walking with his dogs, traveling, cooking, movies, to name a few.

Dr Robert does all aspects of general obstetics and gynecology. 

He has a 30 plus year experience in doing obstretics , gynecology, and surgery.

He is one of the few certified daVinci robotic surgeons in the area and is capable of advanced laparoscopic surgery.

He will give experienced, thoughtful, and compassionate care for any problems.

He is the only one to see you for obstetrics in our office.  He wants all obstetrical patients to also see a perinatologist while pregnant to get the highest quality ultrasounds and consults  on your baby. He will be the one to deliver you unless he is out of town.


Our staff  is great. Most of them have been here more than a decade.We are like a family. We do our best to treat patients as we would like to be treated and go the extra effort to take care of any needs.

Contact Us

Call to Schedule an Appointment

Please contact us directly with any questions, comments, or scheduling inquiries you may have.

Feel free to fax any documents to (805) 498-0860

Grossman & Grossman, M.D.s

558 N. Ventu Park Rd. Suite A, Thousand Oaks, CA 91320, US

Phone (805) 498-0240


Monday - Thursday: 9AM–5PM

Friday: 9AM-12PM

Saturday - Sunday: CLOSED

Emergency Service: 24/7