NPPES file of Aug 9, 2026

Gideon Albert Letz, M.D.

Preventive Medicine/Occupational Environmental Medicine Physician · San Francisco, CA

Gideon Albert Letz, M.D. is a preventive medicine/occupational environmental medicine physician with a practice address in San Francisco, California, and NPI 1942356233, issued on Jan 27, 2007. Check the license (California G35503, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1942356233
Name
Gideon Albert Letz
Credential
M.D.
Primary taxonomy
Preventive Medicine/Occupational Environmental Medicine Physician 2083P0500X
License number
G35503 CA
Self-reported in NPPES; status is on the state search
Practice location
1275 Market St, San Francisco, CA 94103
Phone
(415) 565-1677
Enumerated
Jan 27, 2007
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(415) 581-8044
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest preventive medicine/occupational environmental medicine physician records → All 129 in California → Look up another NPI →

Verify Gideon Albert Letz in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G35503    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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Gideon Albert Letz among 129 preventive medicine/occupational environmental medicine physician records in California

Gideon Albert Letz, M.D. is one of 129 preventive medicine/occupational environmental medicine physician records with a practice address in California. 32% 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 2007, is newer than 33% of them.

  • NPI issued2007 · 33% of these records are older, 37% newer
  • In a Medicare fileNo · 32% of these records are
  • In the CMS Doctors and Clinicians fileNo · 11% of these records are
  • Record last updated2007 · 67% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083P0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Preventive Medicine/Occupational Environmental Medicine Physician providers in California

There are 129 preventive medicine/occupational environmental medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 129 in California → Every provider in San Francisco → Preventive Medicine/Occupational Environmental Medicine Physician nationwide →

The 8 preventive medicine/occupational environmental medicine physician records with the nearest ZIP codes

  1. Lee Wugofski, MD, MPHSan Francisco, CA 941031235409665
  2. Sarah Janssen, MD, PHD, MPHSan Francisco, CA 941021285714972
  3. Christine OgugbuajaSan Francisco, CA 941041053768036
  4. Abena Opoku, MDSan Francisco, CA 941021760773188
  5. Miriam Shipp, M.D., M.P.H.San Francisco, CA 941071255486395
  6. Sandra Morrow, M.D.San Francisco, CA 941091568640373
  7. Sheiphali Gandhi, M.D.San Francisco, CA 941101255692752
  8. Robert Blink, M.D.San Francisco, CA 941141346363793

Common questions

What is Gideon Albert Letz, M.D.'s NPI number?

Gideon Albert Letz, M.D.'s National Provider Identifier (NPI) is 1942356233, issued on Jan 27, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Gideon Albert Letz, M.D. located?

The NPPES record lists a practice address at 1275 Market St, San Francisco, CA, 94103. Phone: (415) 565-1677. Providers update this record themselves, so call before visiting.

How can I verify Gideon Albert Letz, M.D.'s license?

NPPES lists California license number G35503, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.