Gastroenterology / Hepatology

Our division provides a full array of outpatient and inpatient services to patients within the San Francisco Health Network. We have leading experts in the field of both gastroenterology and hepatology and deliver care in an integrative and collaborative approach.  We provide consultation on a full spectrum of gastroenterology (GI) and liver related diseases including patients with acute and chronic liver disease, inflammatory bowel disease, chronic abdominal pain/dyspepsia, AIDS-related GI and liver problems, biliary tract disease, viral hepatitis and disorders of the esophagus and colon/anorectum. To complement our consultative services we also offer a full spectrum of endoscopic services including: EGD, colonoscopy, sigmoidoscopy, advanced endoscopy (ERCP, EUS, balloon enteroscopy), capsule endoscopy, motility/manometry, and 24-hour pH monitoring.


  • Chief: Jacquelyn Maher
  • Director of Clinical Gastroenterology: Lukejohn Day
  • Nursing Director: Kathy Ballou
  • Nursing Manager: Ditas Hernandez


  • Location: Main building 5, 3rd floor, 3D unit
  • Routine clinical issues, call clinic at (415) 206-8823
  • Follow-up patient appointments at (415) 206-8823
  • Fax number is (415) 206-5199

Hours of Operation:

Mon Tues Wed Thu Fri
Direct access endoscopy class 2:00PM-4:00PM - 9:00AM-12:00PM - -
Gastroenterology Clinic - 1:00PM-4:00PM 1:00PM-5:00PM 1:00PM-5:00PM 1:00PM-4:00PM
Endoscopy 8:00AM-12:00PM 8:00AM-12:00PM and 1:00PM-5:00PM - 8:00AM-12:00PM 8:00AM-12:00PM and 1:00PM-5:00PM
Liver Clinic 8:00AM-5:00PM 8:00AM-5:00PM 8:00AM-5:00PM 8:00AM-5:00PM 8:00AM-5:00PM
Hepatitis C Class - - 3:00PM-4:00PM - -


To locate the Gastroenterology & Hepatology clinic/ Para encontrar La Clínica de Gastroenterología y Hepatología:

Go to the main hospital (Building 5). Take the elevators to the 3rd floor. Follow signs for 3D Medical Diagnostic Center. Check-in upon arrival. Vaya al hospital principal (Edificio 5).

Tome el elevador y vaya al piso. Siga las señales para llegar al Centro de Diagnóstico Médico 3D. Regístrese al llegar.



GI Dashboard- Oct 2014Hepatology Dashboard- Oct 2014

Providers with Privileges (updated September 2013):

Ardene Ballonado NP
John Cello MD
Lukejohn Day MD
Mandana Khalili MD
Maria-Idalia Lens MSN, NP
Jacquelyn Maher MD
Justin Sewell MD
Ma Somsouk MD
Miranda Surjadi MS, NP
Michele Tana MD
Michelle Zandian PA