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

William Arnold Diedrich, MD

Individual provider Anatomic Pathology & Clinical Pathology Physician · NPI 1518942168

William Arnold Diedrich, MD is an Anatomic Pathology & Clinical Pathology Physician in Plain City, Ohio. Licensed in Delaware, Indiana, Ohio and Pennsylvania. Registered with an NPI since 2005.

Licensed in
DE, IN, OH, PA
In the registry since
2005
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

320 Lantern Ln
Plain City, OH 43064-2128
Phone: (614) 873-5041
Fax: (614) 873-5041
Show map & directions

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

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence 35.088724 (OH)
Anatomic Pathology & Clinical Pathology Physician Taxonomy 207ZP0102X · Licence MD440611 (PA)
Anatomic Pathology & Clinical Pathology Physician Taxonomy 207ZP0102X · Licence 01068477A (IN)
Anatomic Pathology & Clinical Pathology Physician Taxonomy 207ZP0102X · Licence C1-0002979 (DE)

Record details

NPI number1518942168
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 7, 2005
Last updated in NPPESJanuary 16, 2011