Dr. Lee Maas, M.D.

With 19 years of practice, Dr. Lee Maas is an established emergency medicine provider, M.D., after earning their medical degree at Loma Linda University School Of Medicine in 2006. Dr. currently practices across 5 facilities, including Pomona Valley Hospital Medical Center in Pomona, California. Their National Provider Identifier (NPI) is 1548470081, 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. Lee Maas as a lower-volume emergency medicine provider, treating approximately 381 Medicare beneficiaries and delivering 669 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.