Jennifer A. Brown, M.D.
Hematology & Oncology Physician · San Mateo, CA
Jennifer A. Brown, M.D. is a hematology & oncology physician with a practice address in San Mateo, California, and NPI 1740347350, issued on Jan 2, 2007. Check the license (California A72801, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jennifer A. Brown
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A72801 CA
Self-reported in NPPES; status is on the state search - Practice location
- 218 DE Anza Blvd, San Mateo, CA 94402
- Phone
- (650) 341-9131
- Enumerated
- Jan 2, 2007
- Record last updated
- Jun 8, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (650) 341-9135
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 218 DE Anza Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kent Adler, M.D.Hematology & Oncology Physician1013074632
- Ryan ChangMedical Oncology Physician1164985263
- Karen Chee, M.D.Hematology & Oncology Physician1487637310
- Shu Yi Chen, RPHPharmacist1902401250
- Bradley Ekstrand, M.D., PH.D.Hematology & Oncology Physician1528125135
- Jelena Kao, MDHematology & Oncology Physician1932242062
Verify Jennifer A. Brown in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A72801Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
135 Medicare Part D claims for 44 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Anastrozole20 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.
Jennifer A. Brown among 1,583 hematology & oncology physician records in California
Jennifer A. Brown, M.D. is one of 1,583 hematology & oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 40% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 71% of these records are
- Record last updated2011 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in San Mateo → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Kent Adler, M.D.San Mateo, CA 944021013074632
- Karen Chee, M.D.San Mateo, CA 944021487637310
- Robert Cohen, MDSan Mateo, CA 944021073034765
- Bradley Ekstrand, M.D., PH.D.San Mateo, CA 944021528125135
- Jelena Kao, MDSan Mateo, CA 944021932242062
- Sirisha Tummala, MDSan Mateo, CA 944021851755151
- Elham Vosoughi, M.D.San Mateo, CA 944021134658669
- Katrina FischerSan Mateo, CA 944011477972388
Common questions
What is Jennifer A. Brown, M.D.'s NPI number?
Jennifer A. Brown, M.D.'s National Provider Identifier (NPI) is 1740347350, issued on Jan 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer A. Brown, M.D. located?
The NPPES record lists a practice address at 218 DE Anza Blvd, San Mateo, CA, 94402. Phone: (650) 341-9131. Providers update this record themselves, so call before visiting.
How can I verify Jennifer A. Brown, M.D.'s license?
NPPES lists California license number A72801, 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 A. Brown, M.D. prescribe under Medicare Part D?
In 2024, Jennifer A. Brown, M.D. had 135 Medicare Part D claims for 44 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.