Mary Umahi Obasi Olomu, MD
Internal Medicine Physician · Stanford, CA
Mary Umahi Obasi Olomu, MD is an internal medicine physician with a practice address in Stanford, California, and NPI 1982117628, issued on Nov 15, 2017. Check the license (California A185215, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary Umahi Obasi Olomu
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A185215 CA
Self-reported in NPPES; status is on the state search - Practice location
- 269 Campus Dr # MC5151, Stanford, CA 94305
- Phone
- (650) 723-2300
- Enumerated
- Nov 15, 2017
- Record last updated
- Jan 14, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Mary Umahi Obasi Olomu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A185215Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
58 Medicare Part D claims for 20 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of 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.
Mary Umahi Obasi Olomu among 17,696 internal medicine physician records in California
Mary Umahi Obasi Olomu, MD 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 2017, is newer than 81% of them.
- NPI issued2017 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 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).
378 internal medicine physician records list a practice address in Stanford
They are 378 of the 5,606 NPPES records with a practice address in Stanford, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Stanford → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Michele Barry, MDStanford, CA 943051407839632
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- Nancy Cuan, MDStanford, CA 943051891764791
- Korina De Bruyne, MDStanford, CA 943051770545824
- Madhav Goyal, MDStanford, CA 943051386697878
- Theresa Greco, MDStanford, CA 943051356318240
- Maria Juarez-Reyes, MD, PHDStanford, CA 943051790749877
- Lawrence Kwan, MDStanford, CA 943051922062835
Common questions
What is Mary Umahi Obasi Olomu, MD's NPI number?
Mary Umahi Obasi Olomu, MD's National Provider Identifier (NPI) is 1982117628, issued on Nov 15, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Mary Umahi Obasi Olomu, MD located?
The NPPES record lists a practice address at 269 Campus Dr # MC5151, Stanford, CA, 94305. Phone: (650) 723-2300. Providers update this record themselves, so call before visiting.
How can I verify Mary Umahi Obasi Olomu, MD's license?
NPPES lists California license number A185215, 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 Mary Umahi Obasi Olomu, MD prescribe under Medicare Part D?
In 2024, Mary Umahi Obasi Olomu, MD had 58 Medicare Part D claims for 20 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.