NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Abdullah B Chahin, MD

Critical Care Medicine (Internal Medicine) Physician in Chicago Ridge, IL · enumerated 2009.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1972736890

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Abdullah B Chahin
Credential MD
Sex Male
Practice address 10604 Southwest Hwy Ste 107, Chicago Ridge, IL, 60415
Phone (708) 422-0636
Fax (708) 371-9330
Enumeration date Aug 26, 2009
Last updated in NPPES Apr 2, 2026

Taxonomy & licenses

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 036155515 (IL) Primary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036155515 (IL) Secondary
207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 036155515 (IL) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Abdullah Chahin?
Abdullah Chahin is registered in NPPES with the primary taxonomy of Critical Care Medicine (Internal Medicine) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-02.