Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MR. M HASSAN DIAB MD
NPI 1255338588
Internal Medicine - Hematology & Oncology in Rock Island, IL

Q: What is M Diab's NPI number?

The NPI number for M Diab is 1255338588. It was assigned to this individual provider in the NPPES registry on July 1, 2005.

Q: What is M Diab's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Q: When was this NPI record last updated?

The NPPES record for M Diab was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days 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 01, 2005

2560 24TH ST, SUITE 201, ROCK ISLAND, IL 61201(309) 779-7491(309) 779-3093 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

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About Mr. M Hassan Diab Md NPPES

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

MR. M HASSAN DIAB MD (NPI 1255338588) is an individual hematology & oncology provider in Rock Island, Illinois, licensed in Illinois (3651347) and active in the NPI registry since July 2005.

NPPES Registry Identity

NPI1255338588

Entity TypeIndividualMale

Primary Taxonomy207RH0003X

Provider Legal NameMR. M HASSAN DIABCredential: MD

Location Address2560 24TH ST, SUITE 201Rock Island, IL 61201-5357

Mailing Address2560 24th St, Suite 201Rock Island, IL 61201-5357 · (309) 779-7491 · Fax (309) 779-3093

Phone(309) 779-7491

Fax(309) 779-3093

Sole ProprietorNo

Enumeration DateJuly 1, 2005

Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration

✔ NPI 1255338588 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RH0003X

License✔ Licensed in IL · 3651347

Definition

An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

Also ListedInternal MedicineTaxonomy 207R00000X · License 3651347 (IL)

2560 24TH ST, Rock Island, IL 61201

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Other Identifiers 1

Other08100288IL · Blue Cross Blue Shield

Other Providers at the Same Location NPPES 8

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

DR. LAKSHMI L ALAPATI MD

Internal Medicine (Endocrinology, Diabetes & Metabolism)

2560 24TH ST, SUITE 201
ROCK ISLAND, IL 61201

Rock Island County (309) 779-4100

TAVIA MARIE VITAL RN, CDE

Registered Nurse (Diabetes Educator)

2560 24TH ST, SUITE 102
ROCK ISLAND, IL 61201

Rock Island County (309) 788-0014

PATRICK C CUNNINGHAM MD

Family Medicine

2560 24TH ST, STE 202
ROCK ISLAND, IL 61201

Rock Island County (309) 786-3395

MRS. LYNNDA JEAN GARRETT APMHNP

Nurse Practitioner (Psychiatric/Mental Health)

2560 24TH ST, STE 101
ROCK ISLAND, IL 61201

Rock Island County (951) 212-0475

JANICE E LEVSEN FNP

Nurse Practitioner (Family)

2560 24TH ST, SUITE 202
ROCK ISLAND, IL 61201

Rock Island County (309) 281-2800

STEVEN A RAY MD

Internal Medicine

2560 24TH ST, STE 202
ROCK ISLAND, IL 61201

Rock Island County (309) 794-0590

M. HASSAN DIAB, M.D., S.C.

Internal Medicine (Hematology & Oncology)

2560 24TH ST, SUITE 201
ROCK ISLAND, IL 61201

Rock Island County (309) 779-7491

GENESIS HEALTH SYSTEM

Family Medicine

2560 24TH ST, SUITE 202
ROCK ISLAND, IL 61201

Rock Island County (309) 786-3395

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is M Diab's NPI number?

The NPI number for M Diab is 1255338588. It was assigned to this individual provider in the NPPES registry on July 1, 2005.

Where is M Diab located?

M Diab practices at 2560 24th St Suite 201, Rock Island, IL 61201. The listed phone number is (309) 779-7491.

What is M Diab's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

When was this NPI record last updated?

The NPPES record for M Diab was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days 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.