Gastroenterology at Mount Zion
UCSF Gastroenterology at Mount Zion specializes in the prevention, diagnosis and treatment of liver and digestive tract diseases, including those of the esophagus, stomach, duodenum, gallbladder, biliary tract, pancreas, small intestine and colon.
Our specialists help drive research to better understand digestive disorders and to develop new therapies. Many of our patients participate in clinical trials of potential new treatments for ulcerative colitis, Crohn's disease and other conditions.
Doctor referral required
Tonya Rayne Kaltenbach
Sara Kathryn Smith
MDPediatric gastroenterologist and hepatologist
NP, MSNNurse practitioner
Ardene Ceguerra Ballonado
Maria Josephina Gomez
Libby Susanne Wolf
A Multicenter National Prospective Study of Pregnancy and Neonatal Outcomes in Women With Infla...
A Multicenter National Prospective Study of Pregnancy and Neonatal Outcomes in Women with Inflammatory Bowel Disease study is being conducted at the University of California San Francisco and 30 other sites around th...
Open-Label Extension of RPC1063 as Therapy for Moderate to Severe Ulcerative Colitis
The purpose of this study is to determine the long-term safety of RPC1063 for the treatment of all patients with moderate to severe Ulcerative Colitis (UC) as well as the long-term efficacy of RPC1063 for the treatme...
Safety and Efficacy Trial of RPC1063 for Moderate to Severe Ulcerative Colitis
The purpose of this study is to determine whether RPC1063 is effective in the treatment of Ulcerative Colitis (UC).
Case Management and Social Work
Connect with a team that can help you find resources, solve problems and advocate for you during treatment at UCSF.
Mindfulness-Based Stress Reduction Class
This eight-week UCSF class teaches mindfulness practices, such as meditation and body awareness, that can reduce stress and improve your overall health.
We welcome feedback about your experience at UCSF Health. Find out how to contact us with comments, questions or concerns.
Spiritual Care Services
Chaplains representing many faiths are available around the clock to provide support, comfort and counsel to patients, families and caregivers. Learn more.
Plan your visit
If you live in another country and are coming to UCSF for medical
treatment, our patient liaisons can help coordinate all aspects of your visit.
UCSF offers language services at no charge for patients with limited
English, as well as for patients who are deaf or have trouble hearing.
Checking into the hospital? Find helpful information by clicking on the relevant “Your Hospital Stay” booklet: Mission Bay, Parnassus or Mount
Your Doctor Visit
See our top 10 tips for making your UCSF doctor’s appointment as stress-free and productive as possible.
What to Bring
- Photo I.D.
- Health insurance card
- Insurance authorization, if required
- Doctor's referral, if required
- Recent test results related to your condition
- List of your medications, including dosages, plus any you're allergic to
- List of questions you may have
- Device or paper for taking notes
Gastroenterology at Parnassus
350 Parnassus Ave., Suite 410
San Francisco, CA 94143
Gastrointestinal Surgery at Parnassus
400 Parnassus Ave., Second Floor
San Francisco, CA 94143
Center for Colorectal Surgery
Bakar Precision Cancer Medicine Building
1825 Fourth St., Fourth Floor
San Francisco, CA 94158