Rong W. Zeng, MD

Medicare activity in 2024

Official CMS public-use data for Rong W. Zeng, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)37 services
2. Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)34 services
3. Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory (Q0091)25 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High cholesterol74%
• High blood pressure73%
• Diabetes33%
• Arthritis33%
• Osteoporosis32%
• Depression17%

Hospitals where Rong W. Zeng works

Medicare's Facility Affiliation Data lists Rong W. Zeng 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.

• AHMC Seton Medical CenterDaly City, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050289
• California Pacific Medical Center- Van Ness CampusSan Francisco, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050047
• Peninsula Medical CenterBurlingame, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050007

Practice locations

Addresses where Rong W. Zeng is enrolled with Medicare (CMS data updated October 2, 2026).

• 1850 Sullivan Ave, Suite 550Daly City, CA 94015 (650) 756‑2404

Group practices

Medicare enrollment lists Rong W. Zeng as a member of this group (CMS data updated October 2, 2026).

• UCSF Health Medical Foundation40 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in California →

Other OB-GYNs in Daly City

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

• Cindy S. Lee, DO
• Tina O. Tan, MD
• Clara Ye, MD
• Milagros C. Cabrera, MD
• Minerva L. Pineda, MD
• Kathy A. Shapiro, MD
• Douglas E. Rittenhouse, MD
• Jessica Douthit, MD

All OB-GYNs in Daly City →

Other clinicians in UCSF Health Medical Foundation

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

• Jan T. Rydfors, MD
• Elena L. Chan, MD
• Carol A. Somersille, MD
• Christine M. Kulle, NP
• Santosh Pandipati, MD
• Angela Pollard, 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. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians