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

Individual provider Clinical Psychologist · NPI 1083795686

Gregory W Gerritsen, PHD is a Clinical Psychologist in Boulder, Colorado. Practices as a sole proprietor. Licensed in Colorado.

Licensed in
CO
In the registry since
2006
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

2501 Walnut St Ste 202
Boulder, CO 80302-5751
Phone: (303) 473-4433
Fax: (303) 499-2217
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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 1209 (CO)

Record details

NPI number1083795686
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedOctober 18, 2006
Last updated in NPPESOctober 23, 2007

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