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

Dr. Douglas D. Tassi, OD

Individual provider Optometrist · NPI 1306840111

Dr. Douglas D. Tassi, OD is an Optometrist in Sioux Falls, South Dakota. Licensed in Iowa, Missouri, Nebraska and South Dakota. Registered with an NPI since 2005.

Licensed in
IA, MO, NE, SD
In the registry since
2005
Specialties on file
4
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

2501 W 22nd St
Sioux Falls, SD 57105-1305
Phone: (605) 336-3230
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 649 (SD)
Optometrist Taxonomy 152W00000X · Licence 1655 (IA)
Optometrist Taxonomy 152W00000X · Licence T03000 (MO)
Optometrist Taxonomy 152W00000X · Licence 1131 (NE)

Record details

NPI number1306840111
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorNo
NPI enumeratedJune 9, 2005
Last updated in NPPESSeptember 4, 2008

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