Alger B. Chapman, MD PHD
Pediatrics Physician · San Mateo, CA
Alger B. Chapman, MD PHD is a pediatrics physician with a practice address in San Mateo, California, and NPI 1437145216, issued on Sep 27, 2005. Check the license (California G064005, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Alger B. Chapman
- Credential
- MD PHD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- G064005 CA
Self-reported in NPPES; status is on the state search - Practice location
- 50 S San Mateo Dr, San Mateo, CA 94401
- Phone
- (650) 579-6500
- Enumerated
- Sep 27, 2005
- Record last updated
- Mar 9, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (650) 579-1943
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 50 S San Mateo Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shelley Adams, MDObstetrics & Gynecology Physician1891801932
- Lois Balster, M.D.Pediatrics Physician1568578474
- Bruce Bern, M.D.Ophthalmology Physician1700954278
- Jeanne Beymer, MDPediatrics Physician1114913530
- Hayley Brown, MS, RN, FNP-CFamily Nurse Practitioner1518395169
- Stephen Buchner, MDPediatrics Physician1013938786
Verify Alger B. Chapman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G064005Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Alger B. Chapman among 9,272 pediatrics physician records in California
Alger B. Chapman, MD PHD is one of 9,272 pediatrics physician records with a practice address in California. 31% 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 96% newer
- In a Medicare fileNo · 31% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2020 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatrics Physician providers in California
There are 9,272 pediatrics physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 9,272 in California → Every provider in San Mateo → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Lois Balster, M.D.San Mateo, CA 944011568578474
- Jeanne Beymer, MDSan Mateo, CA 944011114913530
- Stephen Buchner, MDSan Mateo, CA 944011013938786
- Howard Chow, MDSan Mateo, CA 944011083603393
- Jennifer Kaufman, MDSan Mateo, CA 944011992729008
- Vincent Mason, MDSan Mateo, CA 944011669548681
- Kenneth Rosenbaum, MDSan Mateo, CA 944011407922404
- Mark Showen, M.D.San Mateo, CA 944011477576817
Common questions
What is Alger B. Chapman, MD PHD's NPI number?
Alger B. Chapman, MD PHD's National Provider Identifier (NPI) is 1437145216, issued on Sep 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Alger B. Chapman, MD PHD located?
The NPPES record lists a practice address at 50 S San Mateo Dr, San Mateo, CA, 94401. Phone: (650) 579-6500. Providers update this record themselves, so call before visiting.
How can I verify Alger B. Chapman, MD PHD's license?
NPPES lists California license number G064005, 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.