Geraldine Terese O'Shea, DO
Internal Medicine Physician · Jackson, CA
Geraldine Terese O'Shea, DO is an internal medicine physician with a practice address in Jackson, California, and NPI 1013910140, issued on May 23, 2005. Check the license (California 20A7363, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Geraldine Terese O'Shea
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A7363 CA
Self-reported in NPPES; status is on the state search - Practice location
- 235 New York Ranch RD, Jackson, CA 95642
- Phone
- (209) 257-1057
- Enumerated
- May 23, 2005
- Record last updated
- Mar 5, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (209) 257-1058
- Medicaid ID
- 00AX73630 CA
- Medicare enrollment
- Enrolled (PECOS I20050426000961); may accept Medicare assignment
- Medical or professional school
- College Of Osteo Med Of The Pacific At Pomona, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 235 New York Ranch RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Eastman, D.O.Obstetrics & Gynecology Physician1538250899
Verify Geraldine Terese O'Shea in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A7363Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,376 Medicare Part D claims for 199 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 36 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium219 claims
- Atorvastatin Calcium115 claims
- Lisinopril113 claims
- Levothyroxine Sodium111 claims
- Amlodipine Besylate102 claims
- Hydrochlorothiazide92 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.
Geraldine Terese O'Shea among 17,696 internal medicine physician records in California
Geraldine Terese O'Shea, DO is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1993 · median 2004 among the 11,065 with a school on file
- Record last updated2008 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 internal medicine physician records list a practice address in Jackson
They are 13 of the 295 NPPES records with a practice address in Jackson, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Jackson → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Hashim Chaudhry, DOJackson, CA 956421083364616
- Craig Hall, MDJackson, CA 956421013920628
- Robert Hartmann, MDJackson, CA 956421922019017
- Scott Heatley, M.D.Jackson, CA 956421275609729
- Puneet Kaur, M.D.Jackson, CA 956421548537871
- Darrel Kerr, MDJackson, CA 956421437160538
- Dennis Nousaine, M.D.Jackson, CA 956421528079621
- Adrian Oribello, M.D.Jackson, CA 956421912102922
Common questions
What is Geraldine Terese O'Shea, DO's NPI number?
Geraldine Terese O'Shea, DO's National Provider Identifier (NPI) is 1013910140, issued on May 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Geraldine Terese O'Shea, DO located?
The NPPES record lists a practice address at 235 New York Ranch RD, Jackson, CA, 95642. Phone: (209) 257-1057. Providers update this record themselves, so call before visiting.
How can I verify Geraldine Terese O'Shea, DO's license?
NPPES lists California license number 20A7363, 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 Geraldine Terese O'Shea, DO prescribe under Medicare Part D?
In 2024, Geraldine Terese O'Shea, DO had 2,376 Medicare Part D claims for 199 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.