Our Office

Drs. Zamani/Mullen - Walnut Creek, CA

Comfort and convenience are the hallmarks of Drs. Zamani/Mullen Gastroenterology-BASS Medical Group's office operations. To ensure your convenience below is the information you need about our hours, location, appointment scheduling, insurance acceptance and billing.

California Digestive Health Institute
112 La Casa Via, Suite 320
Walnut Creek, CA 94598-3091
(925) 939-5599

Office Hours*
Monday: 9:00 AM - 5:00 PM
Tuesday: 9:00 AM - 5:00 PM
Wednesday: 9:00 AM - 5:00 PM
Thursday: 9:00 AM - 5:00 PM
Friday: 9:00 AM - 5:00 PM
Saturday: Closed
Sunday: Closed

*Closed from 12:00 PM - 2:00 PM 

Click here for door to door driving directions

We know you have many choices when choosing a Gastroenterologist in Walnut Creek, CA so we have made requesting an appointment a simple and convenient process via our Web site. If, for any reason you cannot keep a scheduled appointment, or will be delayed, please call us as soon as possible.

Insurance and Billing
Please contact our office to verify acceptance of your insurance plan. Qualifications for insurance coverage may differ due to the uniqueness of each procedure. We are happy to file insurance for your reimbursement as long as you are free to choose your own gastroenterologist.

Payment Options
Please see our Financial Coordinator for details.