NPPES file of Aug 9, 2026

Michael James Roberts, D.O.

Family Medicine Physician · Downey, CA

Michael James Roberts, D.O. is a family medicine physician with a practice address in Downey, California, and NPI 1477828416, issued on Mar 8, 2012. Check the license (California 20A11503, 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
1477828416
Name
Michael James Roberts
Credential
D.O.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
20A11503 CA
Self-reported in NPPES; status is on the state search
Practice location
11500 Brookshire Ave, Downey, CA 90241
Phone
(562) 904-5000
Enumerated
Mar 8, 2012
Record last updated
Jun 27, 2025
Medicare enrollment
Enrolled (PECOS I20131018000192); accepts Medicare assignment
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 11500 Brookshire Ave

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

  1. Ava Azimi, M.D.Internal Medicine Physician1023252483
  2. Cristionne Barbarin, LCSWClinical Social Worker1942685342
  3. Ivan Barrett, M.D.Diagnostic Radiology Physician1073571113
  4. Tyana Besada, MSN, RN, CNS, CCRNClinical Nurse Specialist1932056231
  5. Payal Bhowmick, PHARMDPharmacotherapy Pharmacist1518783661
  6. Alexis BoltonFamily Nurse Practitioner1215546197

Verify Michael James Roberts in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license 20A11503    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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77% fewer Medicare Part D claims than the average family medicine physician in 2024

808 Medicare Part D claims for 625 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 22 claims were for opioids.

  1. Michael Roberts808
  2. Specialty average3,544

Most prescribed

  1. Fluticasone Propionate122 claims
  2. Lidocaine50 claims
  3. Sulfamethoxazole-Trimethoprim50 claims
  4. Azithromycin49 claims
  5. Nitrofurantoin Mono-Macro41 claims
  6. Amoxicillin-Clavulanate Potass34 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 3 group practices

  1. Exer Medical CorporationGlendora, CA
  2. Faculty Physicians And Surgeons OF LlusmLoma Linda, CA
  3. Lakeside Medical Organization A Medical Group IncWest Covina, CA

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

Michael James Roberts among 17,133 family medicine physician records in California

Michael James Roberts, D.O. 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 2012, is newer than 66% of them.

  • NPI issued2012 · 66% of these records are older, 32% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated2009 · median 2005 among the 10,652 with a school on file
  • Record last updated2025 · 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).

65 family medicine physician records list a practice address in Downey

They are 65 of the 3,607 NPPES records with a practice address in Downey, and 17,133 family medicine physician records in California.

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

The 8 family medicine physician records with the nearest ZIP codes

  1. Matthew Blazon Yee, DODowney, CA 902411710043328
  2. Sherie Carnegie, D ODowney, CA 902411821013772
  3. Simon Chang, M.D.Downey, CA 902411760594097
  4. Andrew Chao, D.O.Downey, CA 902411780621755
  5. Thilan Fernando, M.D.Downey, CA 902411316146632
  6. Ole Heggeness, D.O.Downey, CA 902411518911908
  7. Ragaa Iskarous, M.D.Downey, CA 902411215035274
  8. Antonio Morquecho, PADowney, CA 902411417173220

Common questions

What is Michael James Roberts, D.O.'s NPI number?

Michael James Roberts, D.O.'s National Provider Identifier (NPI) is 1477828416, issued on Mar 8, 2012. An NPI identifies a provider in billing; it is not a license.

Where is Michael James Roberts, D.O. located?

The NPPES record lists a practice address at 11500 Brookshire Ave, Downey, CA, 90241. Phone: (562) 904-5000. Providers update this record themselves, so call before visiting.

How can I verify Michael James Roberts, D.O.'s license?

NPPES lists California license number 20A11503, 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 Michael James Roberts, D.O. prescribe under Medicare Part D?

In 2024, Michael James Roberts, D.O. had 808 Medicare Part D claims for 625 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.