Mohamad Omar Zakaria Diab, MD
Internal Medicine Physician · Sierra Vista, AZ
Mohamad Omar Zakaria Diab, MD is an internal medicine physician with a practice address in Sierra Vista, Arizona, and NPI 1861170177, issued on Jul 6, 2023. Check the license (Arizona 80333, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mohamad Omar Zakaria Diab
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 80333 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 5700 E Highway 90, Sierra Vista, AZ 85635
- Phone
- (520) 263-3190
- Enumerated
- Jul 6, 2023
- Record last updated
- Jul 14, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 5700 E Highway 90
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mohamad Omar Zakaria Diab in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 80333Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
71 Medicare Part D claims for 32 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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: $328.16
5 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mohamad Omar Zakaria Diab among 2,853 internal medicine physician records in Arizona
Mohamad Omar Zakaria Diab, MD is one of 2,853 internal medicine physician records with a practice address in Arizona. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 91% of them.
- NPI issued2023 · 91% of these records are older, 7% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2026 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
45 internal medicine physician records list a practice address in Sierra Vista
They are 45 of the 801 NPPES records with a practice address in Sierra Vista, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Sierra Vista → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Archana Bansal, M.D.Sierra Vista, AZ 856351881663615
- Eduardo Brown, M.D.Sierra Vista, AZ 856351376584359
- Seyed Sohail Habibi Pasdar, M.D.Sierra Vista, AZ 856351205241270
- John Herrod, MDSierra Vista, AZ 856351821022484
- Mohammad Hudeeb, M.D.Sierra Vista, AZ 856351164863569
- Nusrum Iqbal, MDSierra Vista, AZ 856351538191929
- James Keane, D.O.Sierra Vista, AZ 856351740442201
- David Knapp, M.D.Sierra Vista, AZ 856351376735613
Common questions
What is Mohamad Omar Zakaria Diab, MD's NPI number?
Mohamad Omar Zakaria Diab, MD's National Provider Identifier (NPI) is 1861170177, issued on Jul 6, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Mohamad Omar Zakaria Diab, MD located?
The NPPES record lists a practice address at 5700 E Highway 90, Sierra Vista, AZ, 85635. Phone: (520) 263-3190. Providers update this record themselves, so call before visiting.
How can I verify Mohamad Omar Zakaria Diab, MD's license?
NPPES lists Arizona license number 80333, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mohamad Omar Zakaria Diab, MD prescribe under Medicare Part D?
In 2024, Mohamad Omar Zakaria Diab, MD had 71 Medicare Part D claims for 32 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.