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

John D Barker Jr., MD

Individual provider Gastroenterology Physician · NPI 1063486975

John D Barker Jr., MD is a Gastroenterology 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

1001 E 21st St Ste 501
Sioux Falls, SD 57105
Phone: (605) 322-8630
Fax: (605) 322-8631
Show map & directions

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

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 2210 (SD)

Record details

NPI number1063486975
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 15, 2006
Last updated in NPPESDecember 19, 2008

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