Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mari G Leahy, PHARMD

Pharmacist in Chicago, IL · enumerated 2005.

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

National Provider Identifier

1700880077

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Registry record

Entity type Individual (Type 1)

Name Dr. Mari G Leahy

Credential PHARMD

Sex Female

Practice address 2300 N Childrens Plz, Chicago, IL, 60614

Phone (773) 880-4545

Enumeration date Jun 2, 2005

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 11829201 (IL) Primary

PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD 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

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.

What specialty is Mari Leahy?

Mari Leahy is registered in NPPES with the primary taxonomy of Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Tarannum Qureshi Pharmacist · Chicago, IL NPI 1770589319 Pauline Chou Anatomic Pathology & Clinical Pathology Physician · Chicago, IL NPI 1164422341 Hector Melin Aldana Clinical Pathology/Laboratory Medicine Physician · Chicago, IL NPI 1124028352 Elizabeth Perlman Clinical Pathology/Laboratory Medicine Physician · Chicago, IL NPI 1922008150 Susan Hasegawa Anatomic Pathology & Clinical Pathology Physician · Chicago, IL NPI 1265432496 Wei Hseuh Clinical Pathology/Laboratory Medicine Physician · Chicago, IL NPI 1881694016 Tamar Ben-Ami Diagnostic Radiology Physician · Chicago, IL NPI 1043210107 Frederick Smith Chemical Pathology Physician · Chicago, IL NPI 1447250519

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.