HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

JENNIFER YOUNGEUN O'NEILL-CHA, MD

HOSPITALIST

Medical school: LOMA LINDA UNIVERSITY SCHOOL OF MEDICINE

Graduated: 2012

NPI: 1033479936

Practice Locations (1)

JOHN MUIR PHYSICIAN NETWORK

2700 GRANT ST, SUITE 200

CONCORD, CA 945202270

9256740500

Source: CMS National Downloadable File, September 2026.