Tiffany Y. Sia, MD

Hospitals where Tiffany Y. Sia works

Medicare's Facility Affiliation Data lists Tiffany Y. Sia at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• El Camino HealthMountain View, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050308
• Good Samaritan HospitalSan Jose, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050380
• Washington HospitalFremont, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050195

Practice locations

Addresses where Tiffany Y. Sia is enrolled with Medicare (CMS data updated October 2, 2026).

• 2000 Mowry AveFremont, CA 94538 (510) 248‑1000
• 2299 Mowry Ave, Suite 3cFremont, CA 94538 (510) 248‑1470
• 910 Campisi Way, Suite 2aCampbell, CA 95008 (408) 827‑4274

Group practices

Medicare enrollment lists Tiffany Y. Sia as a member of these groups (CMS data updated October 2, 2026).

• Washington Township Medical Foundation117 clinicians in the group
• Bay Area Gynecology Oncology Inc10 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary
• Gynecological Oncologyalso

Find other Obstetrics/Gynecology doctors in California →

Other OB-GYNs in Fremont

Clinicians with the same Medicare primary specialty in Fremont, CA — not a recommendation.

• Ouanza Puplampu, MD
• Ye Shen, MD
• Kyla A. Yee, MD
• Mary M. Co-Asino, MD
• Hanh T. Tran, DO
• Anjalika Pattanaik, MD
• Mei Ge, MD
• Rachna Krishan, MD

All OB-GYNs in Fremont →

Other clinicians in Washington Township Medical Foundation

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Ouanza Puplampu, MD
• Shubhechha Neupane, NP
• Mark Y. Liang, MD
• Sukhbir K. Thind, PA
• Ranjana Sharma, MD
• Yoshita N. Shroff, MD

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
5. Medicare Care Compare — official Medicare tool to look up clinicians