Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Timothy Gerard O Callaghan, DO

Individual provider Family Medicine Physician · NPI 1982604617

Dr. Timothy Gerard O Callaghan, DO is a Family Medicine Physician in Ludington, Michigan. Licensed in Michigan. Registered with an NPI since 2005.

Licensed in
MI
In the registry since
2005
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

922 Lawndale St
Ludington, MI 49431-1928
Phone: (231) 845-7380
Fax: (231) 843-8499
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 009392 (MI)

Record details

NPI number1982604617
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 22, 2005
Last updated in NPPESSeptember 5, 2014
Mailing address100 Michigan St Ne, Mc 845, Grand Rapids, MI 49503-2560

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