John Herziger, MD
Internal Medicine Physician · Sierra Madre, CA
John Herziger, MD is an internal medicine physician with a practice address in Sierra Madre, California, and NPI 1518097914, issued on Mar 6, 2007. Check the license (California G33335, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John Herziger
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G33335 CA
Self-reported in NPPES; status is on the state search - Practice location
- 292 W Montecito Ave, Sierra Madre, CA 91024
- Phone
- (626) 466-1076
- Enumerated
- Mar 6, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Verify John Herziger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G33335Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7 internal medicine physician records list a practice address in Sierra Madre
They are 7 of the 178 NPPES records with a practice address in Sierra Madre, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7 in Sierra Madre → All 17,696 in California → Every provider in Sierra Madre →
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Common questions
What is John Herziger, MD's NPI number?
John Herziger, MD's National Provider Identifier (NPI) is 1518097914, issued on Mar 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Herziger, MD located?
The NPPES record lists a practice address at 292 W Montecito Ave, Sierra Madre, CA, 91024. Phone: (626) 466-1076. Providers update this record themselves, so call before visiting.
How can I verify John Herziger, MD's license?
NPPES lists California license number G33335, 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.