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

Individual provider Clinical Psychologist · NPI 1104849728

Dr. Michael K. Tonjum, PHD is a Clinical Psychologist in Santa Rosa, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
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

1200 College Ave
Santa Rosa, CA 95404-3908
Phone: (707) 568-2300
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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 PSY13055 (CA)

Record details

NPI number1104849728
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedJuly 25, 2006
Last updated in NPPESJuly 8, 2007

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