NPPES file of Aug 9, 2026

Glenn R. Singer, M.D.

Allergy & Immunology Physician · Bakersfield, CA

Glenn R. Singer, M.D. is an allergy & immunology physician with a practice address in Bakersfield, California, and NPI 1801275821, issued on May 22, 2015. Check the license (California G34909, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1801275821
Name
Glenn R. Singer
Credential
M.D.
Primary taxonomy
Allergy & Immunology Physician 207K00000X
License number
G34909 CA
Self-reported in NPPES; status is on the state search
Practice location
4450 California Avenue, Bakersfield, CA 93309
Phone
(661) 716-7100
Enumerated
May 22, 2015
Record last updated
Jun 17, 2015 (not updated in 11 years: call before relying on the address or phone)
Fax
(661) 716-9127
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 allergy & immunology physician records → All 444 in California → Look up another NPI →

Verify Glenn R. Singer in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G34909    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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Industry payments in 2024: $25.15

1 payment: food and beverage; the largest payer was Avadel Cns Pharmaceuticals, LLC. The 2,496 providers of this specialty with any payment received $8,321.81 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Glenn Singer$25.15
  2. Specialty average$8,321.81

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Glenn R. Singer among 444 allergy & immunology physician records in California

Glenn R. Singer, M.D. is one of 444 allergy & immunology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 85% of them.

  • NPI issued2015 · 85% of these records are older, 13% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileNo · 63% of these records are
  • Record last updated2015 · 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 207K00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Allergy & Immunology Physician providers in California

There are 444 allergy & immunology physician records in California.

All 444 in California → Every provider in Bakersfield → Allergy & Immunology Physician nationwide →

The 8 allergy & immunology physician records with the nearest ZIP codes

  1. Eric Boren, MDBakersfield, CA 933011720067598
  2. Tonny Tanus, MDBakersfield, CA 933011740351873
  3. Thuong Nguyen, M.D.Visalia, CA 932911831196294
  4. Robert Holzhauer, MDSan Luis Obispo, CA 934011710955976
  5. Arthur McLean, MDSan Luis Obispo, CA 934011639106727
  6. Daniel More, M.D.San Luis Obispo, CA 934011306844279
  7. Courtney Ramos, D.O.San Luis Obispo, CA 934011144670217
  8. Kelli Rose, M.D.San Luis Obispo, CA 934011407028798

Common questions

What is Glenn R. Singer, M.D.'s NPI number?

Glenn R. Singer, M.D.'s National Provider Identifier (NPI) is 1801275821, issued on May 22, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Glenn R. Singer, M.D. located?

The NPPES record lists a practice address at 4450 California Avenue, Bakersfield, CA, 93309. Phone: (661) 716-7100. Providers update this record themselves, so call before visiting.

How can I verify Glenn R. Singer, M.D.'s license?

NPPES lists California license number G34909, 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. Medicare files from data.cms.gov. 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.