Jennifer Youngeun O'Neill-Cha, M.D.
Hospitalist Physician · Concord, CA
Jennifer Youngeun O'Neill-Cha, M.D. is a hospitalist physician with a practice address in Concord, California, and NPI 1033479936, issued on May 24, 2012. Check the license (California A126813, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jennifer Youngeun O'Neill-Cha
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A126813 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2700 Grant St Ste 200, Concord, CA 94520
- Phone
- (925) 947-3312
- Enumerated
- May 24, 2012
- Record last updated
- Apr 24, 2024
- Medicare enrollment
- Enrolled (PECOS I20150805008714); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 2700 Grant St Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Catherine CadangHospitalist Physician1598342586
- Yuriy DasarHospitalist Physician1720546047
- Jaspreet Garcha, DOHospitalist Physician1114547833
- Sweta Ghodasara, M.D.Hospitalist Physician1851520225
Verify Jennifer Youngeun O'Neill-Cha in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A126813Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average hospitalist physician in 2024
196 Medicare Part D claims for 74 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Metoprolol Succinate11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- John Muir Physician NetworkConcord, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jennifer Youngeun O'Neill-Cha among 3,099 hospitalist physician records in California
Jennifer Youngeun O'Neill-Cha, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 51% of them.
- NPI issued2012 · 51% of these records are older, 44% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2012 · median 2010 among the 2,505 with a school on file
- Record last updated2024 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Concord → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- John Chartier, M.D.Concord, CA 945201659390649
- Sweta Ghodasara, M.D.Concord, CA 945201851520225
- Kari Grabowsky, M.D.Concord, CA 945201578530218
- Eric Hoenig, M.D.Concord, CA 945201003939422
- Shamroze KhanConcord, CA 945201376936856
- Kristin Leonard, DOConcord, CA 945201790195089
- Thomas Nguyen, M.D.Concord, CA 945201669807699
- Amit Rajguru, M.D.Concord, CA 945201225007149
Common questions
What is Jennifer Youngeun O'Neill-Cha, M.D.'s NPI number?
Jennifer Youngeun O'Neill-Cha, M.D.'s National Provider Identifier (NPI) is 1033479936, issued on May 24, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer Youngeun O'Neill-Cha, M.D. located?
The NPPES record lists a practice address at 2700 Grant St Ste 200, Concord, CA, 94520. Phone: (925) 947-3312. Providers update this record themselves, so call before visiting.
How can I verify Jennifer Youngeun O'Neill-Cha, M.D.'s license?
NPPES lists California license number A126813, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jennifer Youngeun O'Neill-Cha, M.D. prescribe under Medicare Part D?
In 2024, Jennifer Youngeun O'Neill-Cha, M.D. had 196 Medicare Part D claims for 74 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.