Dennis Nagel, MD
Internal Medicine Physician · Fontana, CA
Dennis Nagel, MD is an internal medicine physician with a practice address in Fontana, California, and NPI 1427125327, issued on Nov 29, 2006. Check the license (California G32376, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Dennis Nagel
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G32376 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9961 Sierra Ave, Fontana, CA 92335
- Phone
- (909) 427-3910
- Enumerated
- Nov 29, 2006
- Entity
- Type 1 · individual
Also registered at 9961 Sierra Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Dennis Nagel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G32376Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
114 internal medicine physician records list a Fontana practice address
They are 114 of the 3,012 NPPES records with a Fontana practice address, and 20,403 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 114 in Fontana → All 20,403 in California → Every provider in Fontana →
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Common questions
What is Dennis Nagel, MD's NPI number?
Dennis Nagel, MD's National Provider Identifier (NPI) is 1427125327, issued on Nov 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dennis Nagel, MD located?
The NPPES record lists a practice address at 9961 Sierra Ave, Fontana, CA, 92335. Phone: (909) 427-3910. Providers update this record themselves, so call before visiting.
How can I verify Dennis Nagel, MD's license?
NPPES lists California license number G32376, 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), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.