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

Dr. J.d. Thoreson, MD

Individual provider Internal Medicine Physician · NPI 1366430530

Dr. J.d. Thoreson, MD is an Internal Medicine Physician in Mason City, Iowa. Licensed in Iowa. Registered with an NPI since 2005.

Licensed in
IA
In the registry since
2005
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

250 S Crescent Dr
Mason City, IA 50401-2926
Phone: (641) 494-5350
Fax: (641) 494-5403
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 18110 (IA)

Record details

NPI number1366430530
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 11, 2005
Last updated in NPPESDecember 30, 2014
Mailing address250 S Crescent Dr, Mason City, IA 50401-2926

Other providers in Mason City