Brian Kosier

Brian Kosier is a Pharmacotherapy Pharmacist provider (Pharmacist) practicing in Mason, MI, registered in the NPPES registry with NPI 1821408758 since 2014. Practices at Meijer Inc (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum

NPI	1821408758
Entity type	Individual (Type 1)
Name	Brian Kosier
Sex	Male
Practice address	550 HULL RD, Mason, MI, 48854
Phone	5172441910
Enumeration date	2014-04-30
Last updated in NPPES	2014-04-30

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
1835P1200X	Pharmacotherapy Pharmacist	Primary	5302030164	MI
1835P1200X	Pharmacotherapy Pharmacist	Secondary	12351	SC

Copy-ready billing details

Provider: Brian Kosier
NPI: 1821408758
Taxonomy: 1835P1200X (Pharmacotherapy Pharmacist)
Address: 550 HULL RD, Mason, MI, 48854

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1043360340	Meijer Inc	Organization	Community/Retail Pharmacy	Mason, MI
1932233707	Cashell Southwick	Individual	Pharmacist	Mason, MI
1417247461	Terrence Thole	Individual	Pharmacist	Mason, MI
1881004794	Francois Vosloo	Individual	Pharmacotherapy Pharmacist	Mason, MI
1376954081	Linda Szymborski	Individual	Pharmacist	Mason, MI
1265978118	Blaine Kubiak	Individual	Pharmacist	Mason, MI

Verify this record

Cross-check NPI 1821408758 against the authoritative CMS record: view Brian Kosier on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

What specialty is Brian Kosier?

Brian Kosier is registered in NPPES with the primary taxonomy of Pharmacotherapy Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2014-04-30.