Steven J. Thomas, MD
Maternal & Fetal Medicine Physician · San Diego, CA
Steven J. Thomas, MD is a maternal & fetal medicine physician with a practice address in San Diego, California, and NPI 1639242589, issued on Nov 16, 2006. Check the license (California A40379, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Steven J. Thomas
- Credential
- MD
- Primary taxonomy
- Maternal & Fetal Medicine Physician 207VM0101X
- License number
- A40379 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 W Arbor Dr, San Diego, CA 92103
- Phone
- (619) 543-6600
- Enumerated
- Nov 16, 2006
- Record last updated
- Apr 10, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (619) 543-5767
- Entity
- Type 1 · individual
8 nearest maternal & fetal medicine physician records → All 343 in California → Look up another NPI →
Also registered at 200 W Arbor Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Geraldine Abcede, RNCertified Registered Nurse Anesthetist1982384046
- Joseph Abdelmalek, M.DNephrology Physician1740485531
- Kristy AbelCertified Registered Nurse Anesthetist1962113035
- Paula Abeleda, NPFamily Nurse Practitioner1558945022
Verify Steven J. Thomas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A40379Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Steven J. Thomas among 343 maternal & fetal medicine physician records in California
Steven J. Thomas, MD is one of 343 maternal & fetal medicine physician records with a practice address in California. 61% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 52% newer
- In a Medicare fileNo · 61% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2018 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VM0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Maternal & Fetal Medicine Physician providers in California
There are 343 maternal & fetal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 343 in California → Every provider in San Diego → Maternal & Fetal Medicine Physician nationwide →
The 8 maternal & fetal medicine physician records with the nearest ZIP codes
- Jerasimos Ballas, M.D.San Diego, CA 921031871767384
- Homer Chin, M.D.San Diego, CA 921031649205345
- Cynthia Gyamfi Bannerman, M.D.San Diego, CA 921031568494250
- Thomas Kelly, M.D.San Diego, CA 921031336203496
- Chia-Ling Nhan-Chang, M.D.San Diego, CA 921031265686794
- Gladys Ramos, M.D.San Diego, CA 921031710041736
- David Schrimmer, MDSan Diego, CA 921031861578833
- Michelle Nguyen, MDSan Diego, CA 921111104364017
Common questions
What is Steven J. Thomas, MD's NPI number?
Steven J. Thomas, MD's National Provider Identifier (NPI) is 1639242589, issued on Nov 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven J. Thomas, MD located?
The NPPES record lists a practice address at 200 W Arbor Dr, San Diego, CA, 92103. Phone: (619) 543-6600. Providers update this record themselves, so call before visiting.
How can I verify Steven J. Thomas, MD's license?
NPPES lists California license number A40379, 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.