Thomas L. Josa, MD
Allergy & Immunology Physician · Redwood City, CA
Thomas L. Josa, MD is an allergy & immunology physician with a practice address in Redwood City, California, and NPI 1699853242, issued on Nov 1, 2006. Check the license (California A43428, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Thomas L. Josa
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- A43428 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1150 Veterans Blvd, Redwood City, CA 94063
- Phone
- (650) 299-2000
- Enumerated
- Nov 1, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00A434280 CA
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 444 in California → Look up another NPI →
Also registered at 1150 Veterans Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas L. Josa in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A43428Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Thomas L. Josa among 444 allergy & immunology physician records in California
Thomas L. Josa, MD is one of 444 allergy & immunology 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 not. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 53% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 444 in California → Every provider in Redwood City → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Suzanne Henderson, MDRedwood City, CA 940631922452341
- Anita Kallepalli, M.D.Redwood City, CA 940611811335607
- Rajashri Iyengar, M.D.San Carlos, CA 940701811004476
- Shilpa Desai, M.D.South San Francisco, CA 940801235369968
- Robert Lo, M.D.South San Francisco, CA 940801710928999
- Maria Serwonska, MDSouth San Francisco, CA 940801376621995
- Daniel Cerrone, M.D.Sunnyvale, CA 940851285079426
- Renu Gandhe, MDSunnyvale, CA 940851609138874
Common questions
What is Thomas L. Josa, MD's NPI number?
Thomas L. Josa, MD's National Provider Identifier (NPI) is 1699853242, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas L. Josa, MD located?
The NPPES record lists a practice address at 1150 Veterans Blvd, Redwood City, CA, 94063. Phone: (650) 299-2000. Providers update this record themselves, so call before visiting.
How can I verify Thomas L. Josa, MD's license?
NPPES lists California license number A43428, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.