Mahdi Diab, MD
Family Medicine Physician · San Diego, CA
Mahdi Diab, MD is a family medicine physician with a practice address in San Diego, California, and NPI 1043892391, issued on Apr 26, 2021. Check the license (California A191988, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mahdi Diab
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A191988 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1809 National Ave, San Diego, CA 92113
- Phone
- (619) 515-2300
- Enumerated
- Apr 26, 2021
- Record last updated
- Jan 6, 2025
- Medicare enrollment
- Enrolled (PECOS I20241210002617); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1809 National Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mahdi Diab in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A191988Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average family medicine physician in 2024
419 Medicare Part D claims for 81 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 16 claims were for opioids.
Most prescribed
- Lisinopril25 claims
- Atorvastatin Calcium20 claims
- Ozempic13 claims
- Albuterol Sulfate Hfa12 claims
- Losartan Potassium12 claims
- Valacyclovir11 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
- Family Health Centers OF San Diego IncSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mahdi Diab among 17,133 family medicine physician records in California
Mahdi Diab, MD 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 2021, is newer than 91% of them.
- NPI issued2021 · 91% of these records are older, 6% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2020 · 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).
780 family medicine physician records list a practice address in San Diego
They are 780 of the 52,937 NPPES records with a practice address in San Diego, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Diego → Family Medicine Physician nationwide →
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Common questions
What is Mahdi Diab, MD's NPI number?
Mahdi Diab, MD's National Provider Identifier (NPI) is 1043892391, issued on Apr 26, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Mahdi Diab, MD located?
The NPPES record lists a practice address at 1809 National Ave, San Diego, CA, 92113. Phone: (619) 515-2300. Providers update this record themselves, so call before visiting.
How can I verify Mahdi Diab, MD's license?
NPPES lists California license number A191988, 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 Mahdi Diab, MD prescribe under Medicare Part D?
In 2024, Mahdi Diab, MD had 419 Medicare Part D claims for 81 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.
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.