NPPES file of Aug 9, 2026

Charles M. Holzner, M.D.

Endocrinology, Diabetes & Metabolism Physician · Downey, CA

Charles M. Holzner, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Downey, California, and NPI 1861439465, issued on Jun 1, 2006. Check the license (California G45314, 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
1861439465
Name
Charles M. Holzner
Credential
M.D.
Primary taxonomy
Endocrinology, Diabetes & Metabolism Physician 207RE0101X
License number
G45314 CA
Self-reported in NPPES; status is on the state search
Practice location
10000 Lakewood Blvd, Downey, CA 90240
Phone
(562) 862-2384
Enumerated
Jun 1, 2006
Record last updated
Mar 19, 2015 (not updated in 11 years: call before relying on the address or phone)
Fax
(562) 231-1904
Medicaid ID
00G453140 CA
Medicare enrollment
Enrolled (PECOS I20060511000380); accepts Medicare assignment
Medical or professional school
New York Medical College, 1980
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →

Also registered at 10000 Lakewood Blvd

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

  1. Kristy Alston, FNP-CFamily Nurse Practitioner1801110234
  2. Sameer Amin, MDInternal Medicine Physician1326164633
  3. Jose Anguiano, M.D.Internal Medicine Physician1841637576
  4. Rachel Aragon, NPNurse Practitioner1285785725
  5. Miri Chang, FNP-BCFamily Nurse Practitioner1851610158
  6. Sepideh Chegini, M.D.Internal Medicine Physician1871547075

Verify Charles M. Holzner in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G45314    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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73% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024

706 Medicare Part D claims for 232 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. 26 claims were for opioids.

  1. Charles Holzner706
  2. Specialty average2,630

Most prescribed

  1. Furosemide37 claims
  2. Ciprofloxacin Hcl28 claims
  3. Azithromycin27 claims
  4. Prednisone24 claims
  5. Ozempic22 claims
  6. Albuterol Sulfate Hfa17 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $119.77

1 payment: food and beverage; the largest payer was Novo Nordisk Inc. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Charles Holzner$119.77
  2. Specialty average$5,742.15

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

Bills Medicare through one group practice

  1. Pih Health PhysiciansDowney, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Charles M. Holzner among 1,131 endocrinology, diabetes & metabolism physician records in California

Charles M. Holzner, M.D. is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.

  • NPI issued2006 · 5% of these records are older, 54% newer
  • In a Medicare fileYes · 84% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated1980 · median 2003 among the 779 with a school on file
  • Record last updated2015 · 57% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Endocrinology, Diabetes & Metabolism Physician providers in California

There are 1,131 endocrinology, diabetes & metabolism physician records in California.

All 1,131 in California → Every provider in Downey → Endocrinology, Diabetes & Metabolism Physician nationwide →

The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes

  1. David Berger, MDDowney, CA 902411881683944
  2. Christine Kha, DODowney, CA 902411851784763
  3. Elisa Hsia, MDDowney, CA 902421073711701
  4. Karen Le, M.D.Downey, CA 902421427340645
  5. Catherine Monahan, NURSE PRACTITIONEREl Segundo, CA 902451962847400
  6. Neil Goldberg, M.D.Culver City, CA 902321780722181
  7. Xin Chen, M.D.Hawthorne, CA 902501033573241
  8. Tran Ly, M.D.Compton, CA 902221649422924

Common questions

What is Charles M. Holzner, M.D.'s NPI number?

Charles M. Holzner, M.D.'s National Provider Identifier (NPI) is 1861439465, issued on Jun 1, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Charles M. Holzner, M.D. located?

The NPPES record lists a practice address at 10000 Lakewood Blvd, Downey, CA, 90240. Phone: (562) 862-2384. Providers update this record themselves, so call before visiting.

How can I verify Charles M. Holzner, M.D.'s license?

NPPES lists California license number G45314, 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.

How much does Charles M. Holzner, M.D. prescribe under Medicare Part D?

In 2024, Charles M. Holzner, M.D. had 706 Medicare Part D claims for 232 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.

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.