Eileen Gaspar, M.D.
Internal Medicine Physician · Oakland, CA
Eileen Gaspar, M.D. is an internal medicine physician with a practice address in Oakland, California, and NPI 1528396587, issued on Dec 2, 2009. Check the license (California A108331, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Eileen Gaspar
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A108331 CA
Self-reported in NPPES; status is on the state search - Practice location
- 280 W Macarthur Blvd, Oakland, CA 94611
- Phone
- (510) 752-7867
- Enumerated
- Dec 2, 2009
- Record last updated
- Feb 11, 2022
- Fax
- (510) 752-1571
- Medicare enrollment
- Enrolled (PECOS I20110128000001); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 280 W Macarthur Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Eileen Gaspar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A108331Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% more Medicare Part D claims than the average internal medicine physician in 2024
5,684 Medicare Part D claims for 634 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 134 claims were for opioids.
Most prescribed
- Atorvastatin Calcium572 claims
- Losartan Potassium378 claims
- Amlodipine Besylate352 claims
- Lisinopril244 claims
- Levothyroxine Sodium180 claims
- Albuterol Sulfate Hfa149 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
- Permanente Medical Group IncVallejo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eileen Gaspar among 17,696 internal medicine physician records in California
Eileen Gaspar, M.D. 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 2009, is newer than 60% of them.
- NPI issued2009 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2007 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 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).
432 internal medicine physician records list a practice address in Oakland
They are 432 of the 18,558 NPPES records with a practice address in Oakland, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Oakland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Thomas Baudendistel, MDOakland, CA 946111801820436
- Rachel Canning, MDOakland, CA 946111386657609
- Howard Chang, MDOakland, CA 946111700845336
- Roopal Desai, MDOakland, CA 946111699861484
- Matthew Frankel, M.D., M.B.AOakland, CA 946111568542405
- Thomas Hackford, M.D.Oakland, CA 946111972598639
- Jacqueline Kiang, MDOakland, CA 946111376506600
- Katherine McLane, MDOakland, CA 946111447270186
Common questions
What is Eileen Gaspar, M.D.'s NPI number?
Eileen Gaspar, M.D.'s National Provider Identifier (NPI) is 1528396587, issued on Dec 2, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Eileen Gaspar, M.D. located?
The NPPES record lists a practice address at 280 W Macarthur Blvd, Oakland, CA, 94611. Phone: (510) 752-7867. Providers update this record themselves, so call before visiting.
How can I verify Eileen Gaspar, M.D.'s license?
NPPES lists California license number A108331, 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 Eileen Gaspar, M.D. prescribe under Medicare Part D?
In 2024, Eileen Gaspar, M.D. had 5,684 Medicare Part D claims for 634 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.