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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Alexander F Grierson, MS, LMHC, CASAC

Mental Health Counselor in Buffalo, NY · enumerated 2007.

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

National Provider Identifier

1326246877

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Registry record

Entity type Individual (Type 1)
Name Mr. Alexander F Grierson
Credential MS, LMHC, CASAC
Sex Male
Practice address 80 Goodrich St, Kaleida Health, Buffalo, NY, 14203
Phone (716) 859-1576
Fax (716) 859-2434
Enumeration date Jul 6, 2007
Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 8119 (NY) Secondary
101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 001499 (NY) 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 NPI 1326246877 active?
Yes, as of the latest NPPES snapshot, NPI 1326246877 is active (record last updated 2025-09-11).
How do I verify Alexander Grierson's NPI record?
Cross-check NPI 1326246877 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 2025-09-11.