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

Donald J Kosiak Jr., MD

Individual provider Emergency Medicine Physician · NPI 1073541215

Donald J Kosiak Jr., MD is an Emergency Medicine Physician in Sioux Falls, South Dakota. Licensed in South Dakota. Registered with an NPI since 2006.

Licensed in
SD
In the registry since
2006
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

800 E 21st St Emergency Dept
Sioux Falls, SD 57105-1016
Phone: (605) 322-2000
Fax: (605) 322-2036
Show map & directions

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

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 5446 (SD)

Record details

NPI number1073541215
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 28, 2006
Last updated in NPPESAugust 1, 2007

Other providers in Sioux Falls