Irvin V. Ma, MD
Internal Medicine Physician · Santa Clara, CA
Irvin V. Ma, MD is an internal medicine physician with a practice address in Santa Clara, California, and NPI 1487233201, issued on Apr 7, 2021. Check the license (California A196566, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Irvin V. Ma
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A196566 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2441 Mission College Blvd, Santa Clara, CA 95054
- Phone
- (408) 702-6668
- Enumerated
- Apr 7, 2021
- Record last updated
- Oct 22, 2025
- Medicare enrollment
- Enrolled (PECOS I20251016004039); accepts Medicare assignment
- Medical or professional school
- University Of Nevada School Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2441 Mission College Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Archana Bhogill, M.D.Family Medicine Physician1598723058
- Jennifer ChristensenFamily Nurse Practitioner1942181722
- Eric EmeryPediatrics Physician1316507593
- Pia Galindo, DOEmergency Medicine Physician1518459148
- Anna Le, MDPediatrics Physician1235871187
- Yvonne Lee, MDPediatrics Physician1972183507
Verify Irvin V. Ma in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A196566Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
22 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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
- Sutter Bay Medical FoundationSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Irvin V. Ma among 17,696 internal medicine physician records in California
Irvin V. Ma, 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 2021, is newer than 92% of them.
- NPI issued2021 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2021 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 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).
140 internal medicine physician records list a practice address in Santa Clara
They are 140 of the 3,436 NPPES records with a practice address in Santa Clara, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Santa Clara → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kavitha Kambham, M.D.Santa Clara, CA 950541356581748
- Andrea Sullivan, MDSanta Clara, CA 950541265496905
- Richa Ashar, MDSanta Clara, CA 950511083280457
- Julie Jin, MDSanta Clara, CA 950511992440085
- Parnal Kapadia, MDSanta Clara, CA 950511225770167
- Shreyas KudrimotiSanta Clara, CA 950511851086938
- Vinayaka Malakkla, MDSanta Clara, CA 950511093455743
- Justin Olivas, MDSanta Clara, CA 950511891321709
Common questions
What is Irvin V. Ma, MD's NPI number?
Irvin V. Ma, MD's National Provider Identifier (NPI) is 1487233201, issued on Apr 7, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Irvin V. Ma, MD located?
The NPPES record lists a practice address at 2441 Mission College Blvd, Santa Clara, CA, 95054. Phone: (408) 702-6668. Providers update this record themselves, so call before visiting.
How can I verify Irvin V. Ma, MD's license?
NPPES lists California license number A196566, 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 Irvin V. Ma, MD prescribe under Medicare Part D?
In 2024, Irvin V. Ma, MD had 22 Medicare Part D claims; 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.