Provider Profile
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License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
346 68TH ST SW
Grand Rapids, MI 49548
Josiah T. Defer is listed at 346 68Th St Sw, Grand Rapids, MI 49548. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
The number on file is (616) 369-2850. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
Josiah T. Defer's National Provider Identifier is 1386467769. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Josiah T. Defer has 2+ years experience. Registered with an NPI since 2024. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Not yet. This profile is built from public federal data and has not been confirmed by Josiah T. Defer. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.