Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark R Weese, PHARMD

Pharmacist in East Chicago, IN · enumerated 2018.

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

National Provider Identifier

1821505553

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Registry record

Entity type Individual (Type 1)

Name Mark R Weese

Credential PHARMD

Sex Male

Practice address 4321 Fir St, East Chicago, IN, 46312

Phone (219) 392-7480

Enumeration date Jan 3, 2018

Last updated in NPPES Jan 3, 2018

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 26022698A (IN) 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 NPI 1821505553 active?

Yes, as of the latest NPPES snapshot, NPI 1821505553 is active (record last updated 2018-01-03).

How do I verify Mark Weese's NPI record?

Cross-check NPI 1821505553 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-01-03.