Roger Allen Spencer, MD
Maternal & Fetal Medicine Physician · San Jose, CA
Roger Allen Spencer, MD is a maternal & fetal medicine physician with a practice address in San Jose, California, and NPI 1861423121, issued on Jul 5, 2006. Check the license (California G23444, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Roger Allen Spencer
- Credential
- MD
- Primary taxonomy
- Maternal & Fetal Medicine Physician 207VM0101X
- License number
- G23444 CA
Self-reported in NPPES; status is on the state search - Practice location
- 751 S Bascom Ave, San Jose, CA 95128
- Phone
- (408) 885-5550
- Enumerated
- Jul 5, 2006
- Record last updated
- Feb 27, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 00G234440 CA
- Entity
- Type 1 · individual
8 nearest maternal & fetal medicine physician records → All 343 in California → Look up another NPI →
Also registered at 751 S Bascom Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Puya Abbassi, D.O.Neurology Physician1831695428
- Abolghasem Abdoli, MDNeonatal-Perinatal Medicine Physician1790757441
- Erik Abernethy, PAPhysician Assistant1649577354
- Christopher Abrinko, RESIDENT PHYSICIANStudent in an Organized Health Care Education/Training Program1649017328
- Cherine Abu-Eid, MDAnesthesiology Physician1033173307
- Pallavi AcharyaClinical Social Worker1154807873
Verify Roger Allen Spencer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G23444Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Roger Allen Spencer among 343 maternal & fetal medicine physician records in California
Roger Allen Spencer, 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 updated2012 · 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 Jose → Maternal & Fetal Medicine Physician nationwide →
The 8 maternal & fetal medicine physician records with the nearest ZIP codes
- Cheryl Albuquerque, M.D.San Jose, CA 951281093863938
- James Byrne, MDSan Jose, CA 951281831134097
- Jin Chang-Yu, D.O.San Jose, CA 951281104016781
- Odul Amburgey, M.D.San Jose, CA 951241619196466
- Andrew Chao, M.D.Stockton, CA 952041972578896
- Sharon Hood, MDStockton, CA 952041548472962
- Luckey Reed, M.D.Stockton, CA 952041467696963
- Stacy Yadava, M.D.Stockton, CA 952041154689677
Common questions
What is Roger Allen Spencer, MD's NPI number?
Roger Allen Spencer, MD's National Provider Identifier (NPI) is 1861423121, issued on Jul 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Roger Allen Spencer, MD located?
The NPPES record lists a practice address at 751 S Bascom Ave, San Jose, CA, 95128. Phone: (408) 885-5550. Providers update this record themselves, so call before visiting.
How can I verify Roger Allen Spencer, MD's license?
NPPES lists California license number G23444, 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.