Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Brian M Merrill, MD
Psychiatry Physician in Dayton, OH · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1225321144
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Registry record
Entity type Individual (Type 1)
Name Dr. Brian M Merrill
Credential MD
Sex Male
Practice address 330 W 2nd St, Dayton, OH, 45422
Phone (937) 496-6735
Enumeration date May 25, 2011
Last updated in NPPES Mar 4, 2025
Taxonomy & licenses
2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 35.120559 (OH) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD 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 Brian Merrill?
The National Provider Identifier (NPI) for Brian Merrill is 1225321144, a Type 1 (individual) record in the CMS NPPES registry.
Where does Brian Merrill practice?
The practice location on file with NPPES is in Dayton, OH. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-04.