Rajeshwari Ayyar, MD
Medical Oncology Physician · San Jose, CA
Rajeshwari Ayyar, MD is a medical oncology physician with a practice address in San Jose, California, and NPI 1871670703, issued on Oct 31, 2006. Check the license (California C42666, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rajeshwari Ayyar
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- C42666 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2589 Samaritan Dr, San Jose, CA 95124
- Phone
- (408) 426-4900
- Enumerated
- Oct 31, 2006
- Record last updated
- Apr 15, 2024
- Medicaid ID
- 00C426660 CA
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 447 in California → Look up another NPI →
Also registered at 2589 Samaritan Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Teja Bedi, MDMedical Oncology Physician1871777573
- Elwyn Cabebe, MDMedical Oncology Physician1821067281
- Peter Galatin, M.D., PH.D.Medical Oncology Physician1942311386
- Gwendolyn Ho, MDHematology (Internal Medicine) Physician1487970547
- Priya Kumaravelu, MDMedical Oncology Physician1154514677
- George Labban, M.D.Medical Oncology Physician1114925542
Verify Rajeshwari Ayyar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C42666Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average medical oncology physician in 2024
29 Medicare Part D claims for 11 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% 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.
Rajeshwari Ayyar among 447 medical oncology physician records in California
Rajeshwari Ayyar, MD is one of 447 medical oncology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2024 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
All 447 in California → Every provider in San Jose → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Teja Bedi, MDSan Jose, CA 951241871777573
- Hinda Boutrid, MDSan Jose, CA 951241457796070
- Elwyn Cabebe, MDSan Jose, CA 951241821067281
- Thomas Chen, MDSan Jose, CA 951241891870317
- Peter Galatin, M.D., PH.D.San Jose, CA 951241942311386
- Priya Kumaravelu, MDSan Jose, CA 951241154514677
- George Labban, M.D.San Jose, CA 951241114925542
- Martha Man, MDSan Jose, CA 951241518976042
Common questions
What is Rajeshwari Ayyar, MD's NPI number?
Rajeshwari Ayyar, MD's National Provider Identifier (NPI) is 1871670703, issued on Oct 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rajeshwari Ayyar, MD located?
The NPPES record lists a practice address at 2589 Samaritan Dr, San Jose, CA, 95124. Phone: (408) 426-4900. Providers update this record themselves, so call before visiting.
How can I verify Rajeshwari Ayyar, MD's license?
NPPES lists California license number C42666, 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 Rajeshwari Ayyar, MD prescribe under Medicare Part D?
In 2024, Rajeshwari Ayyar, MD had 29 Medicare Part D claims for 11 beneficiaries; the average among medical oncology physician prescribers was 703. 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.