Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William J Leonard, R.P.H.

Pharmacist in Chicago Hts, IL · enumerated 2006.

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

National Provider Identifier

1609832658

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Registry record

Entity type Individual (Type 1)

Name William J Leonard

Credential R.P.H.

Sex Male

Practice address 333 Dixie Hwy, Chicago Hts, IL, 60411

Phone (708) 709-6538

Fax (708) 709-6051

Enumeration date Apr 26, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers Primary

RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH 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

How do I verify William Leonard's NPI record?

Cross-check NPI 1609832658 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1609832658 active?

Yes, as of the latest NPPES snapshot, NPI 1609832658 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.