NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Andrew Clark

Pharmacist in Elmhurst, IL · enumerated 2016.

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

National Provider Identifier

1396290227

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Registry record

Entity type Individual (Type 1)
Name Dr. Andrew Clark
Sex Male
Practice address 944 S York St, Elmhurst, IL, 60126
Phone (630) 834-2000
Enumeration date Aug 21, 2016
Last updated in NPPES Aug 21, 2016

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 051.299707 (IL) Primary

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.

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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 Andrew Clark?
Andrew Clark 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-08-21.