NPPES file of Aug 9, 2026

Glenn Owen Siegfried, M.D.

Emergency Medicine Physician · Fortuna, CA

Glenn Owen Siegfried, M.D. is an emergency medicine physician with a practice address in Fortuna, California, and NPI 1699737304, issued on Apr 6, 2006. Check the license (California C42089, 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
1699737304
Name
Glenn Owen Siegfried
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License number
C42089 CA
Self-reported in NPPES; status is on the state search
Practice location
3300 Renner Dr, Fortuna, CA 95540
Phone
(707) 725-3361
Enumerated
Apr 6, 2006
Record last updated
Oct 29, 2010 (not updated in 16 years: call before relying on the address or phone)
Medicaid ID
00C420890 CA
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 emergency medicine physician records → All 7,751 in California → Look up another NPI →

Also registered at 3300 Renner Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Deji Akinlosotu, CRNACertified Registered Nurse Anesthetist1548574759
  2. Gary Baker, M DDiagnostic Radiology Physician1275635278
  3. Caris CassadyPhysician Assistant1790299048
  4. Francis Cutruzzola, M.D.Diagnostic Radiology Physician1740222645
  5. Stephanie Demara, M.D.Anesthesiology Physician1003841735
  6. Neal Feuerman, MDAnesthesiology Physician1922090919

Verify Glenn Owen Siegfried in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license C42089    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Glenn Owen Siegfried among 7,751 emergency medicine physician records in California

Glenn Owen Siegfried, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% 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 2006, is newer than 4% of them.

  • NPI issued2006 · 4% of these records are older, 60% newer
  • In a Medicare fileNo · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 59% of these records are
  • Record last updated2010 · 59% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

3 emergency medicine physician records list a practice address in Fortuna

They are 3 of the 173 NPPES records with a practice address in Fortuna, and 7,751 emergency medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 7,751 in California → Every provider in Fortuna → Emergency Medicine Physician nationwide →

The 8 emergency medicine physician records with the nearest ZIP codes

  1. Michael Schafle, M.D.Fortuna, CA 955401831262708
  2. Eric Zacharias, M.D.Fortuna, CA 955401386793826
  3. Diane CantrellCrescent City, CA 955311588302392
  4. Timothy Pangborn, MDCrescent City, CA 955311548286248
  5. Randall Steffens, DOCrescent City, CA 955311992745079
  6. Jerry Hughes, M.D.Arcata, CA 955211184896615
  7. Christopher LeeArcata, CA 955211821032962
  8. Kevan Long, M.D.Arcata, CA 955211417169269

Common questions

What is Glenn Owen Siegfried, M.D.'s NPI number?

Glenn Owen Siegfried, M.D.'s National Provider Identifier (NPI) is 1699737304, issued on Apr 6, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Glenn Owen Siegfried, M.D. located?

The NPPES record lists a practice address at 3300 Renner Dr, Fortuna, CA, 95540. Phone: (707) 725-3361. Providers update this record themselves, so call before visiting.

How can I verify Glenn Owen Siegfried, M.D.'s license?

NPPES lists California license number C42089, 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.