Dr. Jennifer O'neill-cha, M.D.

With 14 years of practice, Dr. Jennifer O'neill-cha is an established hospitalist provider, M.D., after earning their medical degree at Loma Linda University School Of Medicine in 2012. Dr. currently practices across 2 facilities, including John Muir Physician Network in Concord, California. Their National Provider Identifier (NPI) is 1033479936, 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. Jennifer O'neill-cha as a lower-volume hospitalist provider, treating approximately 308 Medicare beneficiaries and delivering 352 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.