NPPES file of Aug 9, 2026

Ahmad Siar Ayoubi, M.D., M.S

Family Medicine Physician · Castro Valley, CA

Ahmad Siar Ayoubi, M.D., M.S is a family medicine physician with a practice address in Castro Valley, California, and NPI 1992926075, issued on May 2, 2007. Check the license (California 898468, 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
1992926075
Name
Ahmad Siar Ayoubi
Credential
M.D., M.S
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
898468 CA
Self-reported in NPPES; status is on the state search
Practice location
20101 Lake Chabot RD FL 3, Castro Valley, CA 94546
Phone
(510) 886-3400
Enumerated
May 2, 2007
Record last updated
Sep 23, 2019 (not updated in 7 years: call before relying on the address or phone)
Fax
(510) 506-7729
Medicare enrollment
Enrolled (PECOS I20081118000179); accepts Medicare assignment
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 20101 Lake Chabot RD FL 3

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

  1. Ahlam Algazzali, PHYSICIAN ASSISTANTPhysician Assistant1083210017
  2. Naomi Bitow, MDFamily Medicine Physician1184038895
  3. Kristin Brew, MDOtolaryngology Physician1669568655
  4. Carol Choy, RN, CDEDiabetes Educator Registered Nurse1578076600
  5. Beth Ehrlich, AUDAudiologist1669473195
  6. Kelly Gaughen, D.O.Pediatrics Physician1184988008

Verify Ahmad Siar Ayoubi in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license 898468    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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64% fewer Medicare Part D claims than the average family medicine physician in 2024

1,280 Medicare Part D claims for 178 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 39 claims were for opioids.

  1. Ahmad Ayoubi1,280
  2. Specialty average3,544

Most prescribed

  1. Amlodipine Besylate113 claims
  2. Atorvastatin Calcium83 claims
  3. Gabapentin48 claims
  4. Pantoprazole Sodium44 claims
  5. Losartan Potassium43 claims
  6. Metformin Hcl43 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: $54.45

1 payment: food and beverage; the largest payer was Atricure, Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Ahmad Ayoubi$54.45
  2. Specialty average$902.55

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. Sutter Bay Medical FoundationCastro Valley, CA

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

Ahmad Siar Ayoubi among 17,133 family medicine physician records in California

Ahmad Siar Ayoubi, M.D., M.S 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 2007, is newer than 41% of them.

  • NPI issued2007 · 41% of these records are older, 47% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated2004 · median 2005 among the 10,652 with a school on file
  • Record last updated2019 · 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).

22 family medicine physician records list a practice address in Castro Valley

They are 22 of the 999 NPPES records with a practice address in Castro Valley, and 17,133 family medicine physician records in California.

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

The 8 family medicine physician records with the nearest ZIP codes

  1. Huong Dang, MDCastro Valley, CA 945461417390071
  2. Elmer Jason Grande, MDCastro Valley, CA 945461235323007
  3. Peter Hein, MDCastro Valley, CA 945461497803282
  4. Bhoomika Kamath, M.D.Castro Valley, CA 945461295991354
  5. Jaya Karnani, MDCastro Valley, CA 945461457309783
  6. Genevieve King, M. D.Castro Valley, CA 945461861561243
  7. Christopher Moore, MDCastro Valley, CA 945461437417029
  8. Michael O'Brien, M.D.Castro Valley, CA 945461821181215

Common questions

What is Ahmad Siar Ayoubi, M.D., M.S's NPI number?

Ahmad Siar Ayoubi, M.D., M.S's National Provider Identifier (NPI) is 1992926075, issued on May 2, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Ahmad Siar Ayoubi, M.D., M.S located?

The NPPES record lists a practice address at 20101 Lake Chabot RD FL 3, Castro Valley, CA, 94546. Phone: (510) 886-3400. Providers update this record themselves, so call before visiting.

How can I verify Ahmad Siar Ayoubi, M.D., M.S's license?

NPPES lists California license number 898468, 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 Ahmad Siar Ayoubi, M.D., M.S prescribe under Medicare Part D?

In 2024, Ahmad Siar Ayoubi, M.D., M.S had 1,280 Medicare Part D claims for 178 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.