Dr. Les Liu, MD

With 20 years of practice, Dr. Les Liu is an established internal medicine provider, MD, after earning their medical degree at Northwestern University Feinberg Medical School in 1994. Dr. currently practices across 3 facilities, including Kaiser Foundation Hospital Fontana/ontario in Fontana, California. Their National Provider Identifier (NPI) is 1386703999, and the profile below combines data from CMS NPPES, Medicare billing records, the HHS OIG exclusion list, and — where available — CMS Open Payments, Medicare Utilization, and Part D prescriber summaries.

CMS Medicare data shows Dr. Les Liu as a lower-volume internal medicine provider, treating approximately 20 Medicare beneficiaries and delivering 56 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.