Nayyar Mumtaz Masood, M.D.
Internal Medicine Physician · San Jose, CA
Nayyar Mumtaz Masood, M.D. is an internal medicine physician with a practice address in San Jose, California, and NPI 1639499866, issued on Jun 10, 2010. Check the license (California A051888, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nayyar Mumtaz Masood
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A051888 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5855 Silver Creek Valley RD, San Jose, CA 95138
- Phone
- (408) 574-9100
- Enumerated
- Jun 10, 2010
- Record last updated
- Jan 18, 2022
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 5855 Silver Creek Valley RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Antanisha Alves, LMSWClinical Social Worker1821825076
- Darren Andrus, RNPsychiatric/Mental Health Registered Nurse1780422295
- Joseph BascosRegistered Nurse1275475469
- Lori Buelna, LCSWClinical Social Worker1770594962
- Argie CabacunganAmbulatory Care Registered Nurse1699512723
- Lily Castillon, RNAmbulatory Care Registered Nurse1023838521
Verify Nayyar Mumtaz Masood in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A051888Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
11 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% 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.
Nayyar Mumtaz Masood among 17,696 internal medicine physician records in California
Nayyar Mumtaz Masood, 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- 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).
428 internal medicine physician records list a practice address in San Jose
They are 428 of the 20,925 NPPES records with a practice address in San Jose, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Jose → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Swaroopa Bussa, MDSan Jose, CA 951381003994856
- Albert Liang, M.D.San Jose, CA 951381659311025
- Shailender Singh, M.D.San Jose, CA 951381770783292
- Natasha Ahmed, M.D.San Jose, CA 951341174781165
- Lakshmi Bythadka, M.D.San Jose, CA 951341598909764
- Emiliano Ramos, MDSan Jose, CA 951341699727867
- Anisa Rangwala, MDSan Jose, CA 951331164678181
- Nidhi Gupta, MDSan Jose, CA 951311346295201
Common questions
What is Nayyar Mumtaz Masood, M.D.'s NPI number?
Nayyar Mumtaz Masood, M.D.'s National Provider Identifier (NPI) is 1639499866, issued on Jun 10, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Nayyar Mumtaz Masood, M.D. located?
The NPPES record lists a practice address at 5855 Silver Creek Valley RD, San Jose, CA, 95138. Phone: (408) 574-9100. Providers update this record themselves, so call before visiting.
How can I verify Nayyar Mumtaz Masood, M.D.'s license?
NPPES lists California license number A051888, 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 Nayyar Mumtaz Masood, M.D. prescribe under Medicare Part D?
In 2024, Nayyar Mumtaz Masood, M.D. had 11 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.