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

Gary Steven Marckstadt, MD

Individual provider Family Medicine Physician · NPI 1053364091

Gary Steven Marckstadt, MD is a Family 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

900 E 54th St N Ste 200
Sioux Falls, SD 57104-0686
Phone: (605) 332-2883
Fax: (605) 328-5831
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 3887 (SD)

Record details

NPI number1053364091
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 19, 2006
Last updated in NPPESSeptember 6, 2019

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