NPPES file of Aug 9, 2026

Marvin Alan Zamost, M.D.

Family Medicine Physician · Long Beach, CA

Marvin Alan Zamost, M.D. is a family medicine physician with a practice address in Long Beach, California, and NPI 1922041045, issued on Jun 14, 2006. Check the license (California G26888, 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
1922041045
Name
Marvin Alan Zamost
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
G26888 CA
Self-reported in NPPES; status is on the state search
Practice location
6226 E Spring St, Long Beach, CA 90815
Phone
(562) 420-1338
Enumerated
Jun 14, 2006
Record last updated
Oct 17, 2012 (not updated in 14 years: call before relying on the address or phone)
Fax
(562) 420-7389
Medicare enrollment
Enrolled (PECOS I20051004000439); accepts Medicare assignment
Medical or professional school
Tufts University School Of Medicine, 1972
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 family medicine physician records → All 17,133 in California → Look up another NPI →

Also registered at 6226 E Spring St

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

  1. Karen Allsup, M.D.Family Medicine Physician1144268665
  2. Marvin Beitner, PH.D.Clinical Psychologist1164590469
  3. Robert Cohen, M.D.Family Medicine Physician1588615553
  4. Joseph De Orio, M.D.Urology Physician1518981232
  5. Arthur Gage, D.D.S.Endodontics1467445809
  6. Nancy Godfrey, M.D.Rheumatology Physician1790777449

Verify Marvin Alan Zamost in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G26888    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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3.1 times the Medicare Part D claims of the average family medicine physician in 2024

10,940 Medicare Part D claims for 874 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 355 claims were for opioids.

  1. Marvin Zamost10,940
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium621 claims
  2. Losartan Potassium572 claims
  3. Rosuvastatin Calcium508 claims
  4. Levothyroxine Sodium491 claims
  5. Amlodipine Besylate467 claims
  6. Simvastatin338 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.

Bills Medicare through one group practice

  1. Healthcare Partners Affiliates Medical GroupRedondo Beach, CA

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

Marvin Alan Zamost among 17,133 family medicine physician records in California

Marvin Alan Zamost, M.D. is one of 17,133 family 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. Its NPI, issued in 2006, is newer than 6% of them.

  • NPI issued2006 · 6% of these records are older, 59% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated1972 · median 2005 among the 10,652 with a school on file
  • Record last updated2012 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

213 family medicine physician records list a practice address in Long Beach

They are 213 of the 13,650 NPPES records with a practice address in Long Beach, and 17,133 family medicine physician records in California.

All 17,133 in California → Every provider in Long Beach → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. Karen Allsup, M.D.Long Beach, CA 908151144268665
  2. Tuong Bui, MDLong Beach, CA 908151841251659
  3. Robert Cohen, M.D.Long Beach, CA 908151588615553
  4. Masoomeh Djodeir, MDLong Beach, CA 908151568442986
  5. Paul Eisman, MDLong Beach, CA 908151285639773
  6. Robert Hanser, DOLong Beach, CA 908151982675427
  7. Stephen Harms, DOLong Beach, CA 908151447241039
  8. David Kim, MDLong Beach, CA 908151528059607

Common questions

What is Marvin Alan Zamost, M.D.'s NPI number?

Marvin Alan Zamost, M.D.'s National Provider Identifier (NPI) is 1922041045, issued on Jun 14, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Marvin Alan Zamost, M.D. located?

The NPPES record lists a practice address at 6226 E Spring St, Long Beach, CA, 90815. Phone: (562) 420-1338. Providers update this record themselves, so call before visiting.

How can I verify Marvin Alan Zamost, M.D.'s license?

NPPES lists California license number G26888, 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 Marvin Alan Zamost, M.D. prescribe under Medicare Part D?

In 2024, Marvin Alan Zamost, M.D. had 10,940 Medicare Part D claims for 874 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.