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

Dr. Joel Vincent Merkwan, PHD

Individual provider Clinical Psychologist · NPI 1699810879

Dr. Joel Vincent Merkwan, PHD is a Clinical Psychologist in Yankton, South Dakota. Qualified in 2005, 21 years ago. Accepts Medicare assignment. Licensed in North Dakota and South Dakota.

Years since qualifying
21
Licensed in
ND, SD
In the registry since
2007
Specialties on file
2
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

327 Broadway Ave Ste 15
Yankton, SD 57078-7800
Phone: (605) 661-6128
Show map & directions

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

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 393 (ND)
Clinical Psychologist Taxonomy 103TC0700X · Licence 490 (SD)

Record details

NPI number1699810879
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedFebruary 21, 2007
Last updated in NPPESJune 29, 2010

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2005 (21 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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