Internal Medicine Physician in Westminster, CA

Ranked by profile completeness, registry tenure & documented Medicare activity — an honest, data-backed ordering, not a quality, outcomes, or patient-satisfaction verdict.

Compare 75 Internal Medicine Physician providers with a practice address in Westminster, California. Every entry is a real NPI record you can open and verify; 97% of the ranked results below have a street-level (rooftop) location.

Providers in city

Street-level located

97%

Registry vintage

June 2026

Ranked Internal Medicine Physician

Top 30 of 75

75 Internal Medicine Physician practice in Westminster. Compare the most complete records below, or filter the full list by name and nearby ZIP.

Find Internal Medicine Physician near you →

1
Theresa Thanh NguyenM.D.

Ranking reflects NPPES profile completeness, registry tenure, and documented Medicare activity (where present) — see our methodology. It is not a measure of clinical quality or patient satisfaction. Source: CMS NPPES (June 2026); specialty taxonomy: NUCC. Locations are geocoded from the public practice address.