NPPES file of Aug 9, 2026

Judy S. Bertelsen, M.D.

Geriatric Medicine (Internal Medicine) Physician · Alameda, CA

Judy S. Bertelsen, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Alameda, California, and NPI 1881747426, issued on Jan 18, 2007. Check the license (California G79823, 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
1881747426
Name
Judy S. Bertelsen
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
G79823 CA
Self-reported in NPPES; status is on the state search
Practice location
2401 Blanding Ave, Alameda, CA 94501
Phone
(510) 486-1467
Enumerated
Jan 18, 2007
Record last updated
Jan 16, 2009 (not updated in 17 years: call before relying on the address or phone)
Medicaid ID
00G798230 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 geriatric medicine (internal medicine) physician records → All 532 in California → Look up another NPI →

Also registered at 2401 Blanding Ave

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

  1. Alison Grygo, COTA/LOccupational Therapy Assistant1770200073
  2. Jonathan Jiang, OTR/LOccupational Therapist1811638265
  3. Yusa LiuStudent in an Organized Health Care Education/Training Program1689413817

Verify Judy S. Bertelsen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G79823    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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Judy S. Bertelsen among 532 geriatric medicine (internal medicine) physician records in California

Judy S. Bertelsen, M.D. is one of 532 geriatric medicine (internal medicine) physician records with a practice address in California. 77% 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 54% of them.

  • NPI issued2007 · 54% of these records are older, 34% newer
  • In a Medicare fileNo · 77% of these records are
  • In the CMS Doctors and Clinicians fileNo · 51% of these records are
  • Record last updated2009 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in California

There are 532 geriatric medicine (internal medicine) physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 532 in California → Every provider in Alameda → Geriatric Medicine (Internal Medicine) Physician nationwide →

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

  1. Daniel Cremin, M.D.Concord, CA 945191386867422
  2. Suprabha Jain, MDPleasant Hill, CA 945231841228384
  3. Samina Khwaja, M.D.Fremont, CA 945381225141963
  4. Gary Lee, MDFremont, CA 945381710943113
  5. Phyu Phyu Lim, MDFremont, CA 945391043534803
  6. Donna Heinle, M.D.Livermore, CA 945501780693234
  7. Sumangala Kote, M.D.Livermore, CA 945501891731899
  8. Sophia Chen, D.O.Martinez, CA 945531225371016

Common questions

What is Judy S. Bertelsen, M.D.'s NPI number?

Judy S. Bertelsen, M.D.'s National Provider Identifier (NPI) is 1881747426, issued on Jan 18, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Judy S. Bertelsen, M.D. located?

The NPPES record lists a practice address at 2401 Blanding Ave, Alameda, CA, 94501. Phone: (510) 486-1467. Providers update this record themselves, so call before visiting.

How can I verify Judy S. Bertelsen, M.D.'s license?

NPPES lists California license number G79823, 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.