Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Slade
Pharmacist in Buffalo, NY · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598978421
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Registry record
Entity type Individual (Type 1)
Name Mark Slade
Sex Male
Practice address 3920 Main St, Suite 100, Buffalo, NY, 14226
Phone (716) 876-2323
Enumeration date May 7, 2007
Last updated in NPPES Sep 20, 2023
Taxonomy & licenses
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.
Frequently asked questions
Is NPI 1598978421 active?
Yes, as of the latest NPPES snapshot, NPI 1598978421 is active (record last updated 2023-09-20).
How do I verify Mark Slade's NPI record?
Cross-check NPI 1598978421 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-20.