Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark Ryan Messer, PHARMD
Pharmacist in Blanchester, OH · enumerated 2023.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1891567822
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark Ryan Messer
Credential PHARMD
Sex Male
Practice address 1001 Cherry St Ste A, Blanchester, OH, 45107
Phone (937) 783-0270
Fax (937) 783-0295
Enumeration date Oct 24, 2023
Last updated in NPPES Oct 24, 2023
Taxonomy & licenses
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.
Frequently asked questions
What is the NPI number for Mark Messer?
The National Provider Identifier (NPI) for Mark Messer is 1891567822, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Messer practice?
The practice location on file with NPPES is in Blanchester, OH. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-24.