Rodman A. St. Clair, M.D.
Internal Medicine Physician · Ontario, CA
Rodman A. St. Clair, M.D. is an internal medicine physician with a practice address in Ontario, California, and NPI 1275788630, issued on Nov 25, 2008. Check the license (California G39277, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Rodman A. St. Clair
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G39277 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3281 E Guasti RD, Ontario, CA 91761
- Phone
- (909) 605-8015
- Enumerated
- Nov 25, 2008
- Record last updated
- Nov 25, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (866) 929-7385
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3281 E Guasti RD
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Verify Rodman A. St. Clair in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G39277Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Rodman A. St. Clair among 17,696 internal medicine physician records in California
Rodman A. St. Clair, 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 not. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2008 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,696 in California → Every provider in Ontario → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Liwanag Asuncion, M.D.Ontario, CA 917611437122082
- David Hirota, M.D.Ontario, CA 917611699735191
- Dianne Quintana, M.D.Ontario, CA 917611386083780
- Sujay DayalOntario, CA 917621740920966
- Mohammed Al-Khayyat, M.D.Montclair, CA 917631588195424
- Sadia Khan, MDMontclair, CA 917631225271125
- George Moran, MDMontclair, CA 917631639673635
- Kiandokht Partovi, M.D.Montclair, CA 917631689763427
Common questions
What is Rodman A. St. Clair, M.D.'s NPI number?
Rodman A. St. Clair, M.D.'s National Provider Identifier (NPI) is 1275788630, issued on Nov 25, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Rodman A. St. Clair, M.D. located?
The NPPES record lists a practice address at 3281 E Guasti RD, Ontario, CA, 91761. Phone: (909) 605-8015. Providers update this record themselves, so call before visiting.
How can I verify Rodman A. St. Clair, M.D.'s license?
NPPES lists California license number G39277, 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.