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

Individual provider Clinical Psychologist · NPI 1508040627

William P. Kooistra, PHD is a Clinical Psychologist in Grand Haven, Michigan. Practices as a sole proprietor. Licensed in Michigan.

Licensed in
MI
In the registry since
2007
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

41 Washington Ave Ste 365
Grand Haven, MI 49417-3304
Phone: (616) 399-9911
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 6301007943 (MI)

Record details

NPI number1508040627
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedDecember 26, 2007
Last updated in NPPESDecember 23, 2016
Mailing address41 Washington Ave, Ste 365, Grand Haven, MI 49417-3304

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