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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. William Ray Clark Jr., PHARM D

Pharmacist in Ithaca, NY · enumerated 2009.

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

National Provider Identifier

1689908246

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Registry record

Entity type Individual (Type 1)
Name Dr. William Ray Clark Jr.
Credential PHARM D
Sex Male
Practice address Ithaca, NY, 14850
Phone (607) 272-8333
Fax (607) 272-8366
Enumeration date Sep 29, 2009
Last updated in NPPES Jan 22, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License PR5745 (ME) Secondary
183500000X Pharmacist Pharmacy Service Providers · License 058841 (NY) 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.

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Frequently asked questions

What is the NPI number for William Clark?
The National Provider Identifier (NPI) for William Clark is 1689908246, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Clark practice?
The practice location on file with NPPES is in Ithaca, NY. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-22.