Mariam H. Beshai, MD
Hospitalist Physician · Castro Valley, CA
Mariam H. Beshai, MD is a hospitalist physician with a practice address in Castro Valley, California, and NPI 1447839956, issued on Apr 3, 2021. Check the license (California A194184, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mariam H. Beshai
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A194184 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20103 Lake Chabot RD, Castro Valley, CA 94546
- Phone
- (510) 537-1234
- Enumerated
- Apr 3, 2021
- Record last updated
- Oct 3, 2024
- Medicare enrollment
- Enrolled (PECOS I20240824000055); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 20103 Lake Chabot RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Latricia Amadeo, RNRegistered Nurse1003407115
- Sandhya Ashokkumar, MDCritical Care Medicine (Internal Medicine) Physician1457913402
- Oluwaseyi Balasire, M.D.Hospitalist Physician1003235243
- Rachna Bali, DOHospitalist Physician1346541554
Verify Mariam H. Beshai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A194184Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average hospitalist physician in 2024
174 Medicare Part D claims for 41 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Atorvastatin Calcium16 claims
- Trulicity13 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
- 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).
Mariam H. Beshai among 3,099 hospitalist physician records in California
Mariam H. Beshai, MD is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 90% of them.
- NPI issued2021 · 90% of these records are older, 6% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2017 · median 2010 among the 2,505 with a school on file
- Record last updated2024 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
29 hospitalist physician records list a practice address in Castro Valley
They are 29 of the 999 NPPES records with a practice address in Castro Valley, and 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Castro Valley → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Arash Foroutani, M.D.Castro Valley, CA 945461346267309
- Alina Haq, M.D.Castro Valley, CA 945461669665436
- Fatma Khakoo, MDCastro Valley, CA 945461326045196
- Pei-Fen Lin, MDCastro Valley, CA 945461740429885
- Daisy Maron, M.D.Castro Valley, CA 945461275565954
- Summaiya Muhammad, M.DCastro Valley, CA 945461841454535
- Tianli Pan, MDCastro Valley, CA 945461578783791
- Sindhu Radhakrishnan, MDCastro Valley, CA 945461497833073
Common questions
What is Mariam H. Beshai, MD's NPI number?
Mariam H. Beshai, MD's National Provider Identifier (NPI) is 1447839956, issued on Apr 3, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Mariam H. Beshai, MD located?
The NPPES record lists a practice address at 20103 Lake Chabot RD, Castro Valley, CA, 94546. Phone: (510) 537-1234. Providers update this record themselves, so call before visiting.
How can I verify Mariam H. Beshai, MD's license?
NPPES lists California license number A194184, 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 Mariam H. Beshai, MD prescribe under Medicare Part D?
In 2024, Mariam H. Beshai, MD had 174 Medicare Part D claims for 41 beneficiaries; the average among hospitalist physician prescribers was 521. 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.
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.