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

Dr. Ralph Lloyd Olson Jr., PHD

Individual provider Clinical Psychologist · NPI 1790708881

Dr. Ralph Lloyd Olson Jr., PHD is a Clinical Psychologist in Marquette, Michigan. Qualified in 1990, 36 years ago. Accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
36
Licensed in
MI
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

220 W Washington St Ste 420
Marquette, MI 49855-4359
Phone: (906) 225-5462
Fax: (906) 225-5462
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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 6301008509 (MI)

Record details

NPI number1790708881
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedJuly 26, 2006
Last updated in NPPESJanuary 3, 2011

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1990 (36 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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