Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Jennifer Youngeun O'Neill-Cha, MD

Individual provider Hospitalist Physician · NPI 1033479936

Jennifer Youngeun O'Neill-Cha, MD is a Hospitalist in Concord, California. Graduated from Loma Linda University School of Medicine in 2012, 14 years ago. Practices with John Muir Physician Network, a 486-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
14
Trained at
Loma Linda University School of Medicine
Licensed in
CA
In the registry since
2012
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

2700 Grant St Ste 200
Concord, CA 94520-2270
Phone: (925) 947-3312
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 350 Hawthorne Ave Rm 2346, Oakland, CA 94609-3108 — (510) 869-6883

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence A126813 (CA)

Record details

NPI number1033479936
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 24, 2012
Last updated in NPPESApril 24, 2024
Certification dateApril 24, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Medical schoolLOMA LINDA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2012 (14 years in practice)
Group practice John Muir Physician Network — 486 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients265
Services billed 685 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at John Muir Physician Network

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 486 clinicians in the practice; 12 are shown here.

Other providers in Concord