DR. MOHAMAD OMAR ZAKARIA DIAB MD
NPI 1861170177
Internal Medicine in Sierra Vista, AZ

Q: What is Mohamad Omar Diab's NPI number?

The NPI number for Mohamad Omar Diab is 1861170177. It was assigned to this individual provider in the NPPES registry on July 6, 2023.

Q: What is Mohamad Omar Diab's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Mohamad Omar Diab was last updated on July 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 06, 2023PECOS Enrolled

5700 E HIGHWAY 90, SIERRA VISTA, AZ 85635(520) 263-3190 Get Directions Write a Review

NPPES record last updated: July 14, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 14, 2026, Jul 6, 2023 (2 updates tracked since 2023).

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About Dr. Mohamad Omar Zakaria Diab Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MOHAMAD OMAR ZAKARIA DIAB MD (NPI 1861170177) is an individual internal medicine provider in Sierra Vista, Arizona, licensed in Arizona (80333) and active in the NPI registry since July 2023. He is enrolled in Medicare PECOS and is a graduate of Other (2023).

NPPES Registry Identity

NPI1861170177

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. MOHAMAD OMAR ZAKARIA DIABCredential: MD

Location Address5700 E HIGHWAY 90Sierra Vista, AZ 85635-9110

Mailing Address6835 E Camelback Rd Unit 9015Scottsdale, AZ 85251-3160 · (520) 286-0930

Phone(520) 263-3190

Sole ProprietorYes

Medical School CMSOtherGraduated 2023

Enumeration DateJuly 6, 2023

Last NPPES UpdateJuly 14, 20262 updates tracked since enumeration

NPPES CertifiedJuly 14, 2026

✔ NPI 1861170177 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in AZ · 80333

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

5700 E HIGHWAY 90, Sierra Vista, AZ 85635

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mohamad Omar Zakaria Diab Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5092273466

PECOS Enrollment IDI20260815000898

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Mohamad Omar Diab reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Banner - University Hospital Based Physicians LLC

171 mi

General Acute Care Hospital

2901 N CENTRAL AVE STE 160
Phoenix, AZ 85012

Reassigned Medicare billing, Arizona enrollment
728 clinicians in this Medicare group

NPI 1750751566 (602) 747-4000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85635 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$127.71 typical visit price

range $55.44 – $168.60

Typical copayment $31.92 (range $13.86 – $42.15)

Most-billed visit code 99204

Established Patient

$98.00 typical visit price

range $17.72 – $137.41

Typical copayment $24.50 (range $4.43 – $34.35)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

AMMAD RAINA

Internal Medicine