Elena Nguyen, MD

Medicare activity in 2024

Official CMS public-use data for Elena Nguyen, 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. New patient complete exam of visual system (92004)57 services
2. Exam to measure eye deviation and range of motion (92060)47 services
3. Established patient complete exam of visual system (92014)45 services
4. Photography of the retina (92250)42 services
5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)42 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 cholesterol73%
• High blood pressure62%
• Arthritis36%
• Ischemic heart disease26%
• Diabetes25%
• Osteoporosis19%

Hospitals where Elena Nguyen works

Medicare's Facility Affiliation Data lists Elena Nguyen 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.

• Peninsula Medical CenterBurlingame, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050007

Practice locations

Addresses where Elena Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).

• 1241 E Hillsdale Blvd, Suite 220Foster City, CA 94404 (650) 288‑1633

Group practices

Medicare enrollment lists Elena Nguyen as a member of this group (CMS data updated October 2, 2026).

• Santa Clara Ophthalmology Incorporated3 clinicians in the group

Specialties

• Ophthalmologyprimary

Find other Ophthalmology doctors in California →

Other ophthalmologists in California

Clinicians with the same Medicare primary specialty in California — not a recommendation.

• Eve E. Moscato, MD
• Stuart R. Seiff, MD
• Hossein Ameri, MD
• Bethlehem D. Mekonnen, MD
• Clifford Terry, MD
• Chad Y. Lewis, MD
• James M. Jumper, MD
• Alena Reznik, MD

All ophthalmologists in California →

Other clinicians in Santa Clara Ophthalmology Incorporated

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

• Chloe I. Kang, OD
• Ho Sun Choi, 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