John Balmes, MD
Internal Medicine Physician · San Francisco, CA
John Balmes, MD is an internal medicine physician with a practice address in San Francisco, California, and NPI 1851478374, issued on Nov 1, 2006. Check the license (California G48421, 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 Balmes
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G48421 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1001 Potrero Avenue, San Francisco, CA 94110
- Phone
- (415) 206-5200
- Enumerated
- Nov 1, 2006
- Entity
- Type 1 · individual
Also registered at 1001 Potrero Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Balmes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G48421Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
1,593 internal medicine physician records list a San Francisco practice address
They are 1,593 of the 38,143 NPPES records with a San Francisco 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 1,593 in San Francisco → All 20,403 in California → Every provider in San Francisco →
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Common questions
What is John Balmes, MD's NPI number?
John Balmes, MD's National Provider Identifier (NPI) is 1851478374, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Balmes, MD located?
The NPPES record lists a practice address at 1001 Potrero Avenue, San Francisco, CA, 94110. Phone: (415) 206-5200. Providers update this record themselves, so call before visiting.
How can I verify John Balmes, MD's license?
NPPES lists California license number G48421, 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.