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

Dr. Mary Madeline Johnson, PHD

Individual provider Psychologist · NPI 1124162763

Dr. Mary Madeline Johnson, PHD is a Psychologist in Dubuque, Iowa. Practices as a sole proprietor. Licensed in Iowa.

Licensed in
IA
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.

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Practice location Address checks out

16306 Forest Gate Rd
Dubuque, IA 52001-9701
Phone: (563) 556-7071
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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 00568 (IA)
Psychologist Taxonomy 103T00000X · Licence 00568 (IA)

Record details

NPI number1124162763
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorYes
NPI enumeratedFebruary 16, 2007
Last updated in NPPESSeptember 11, 2025

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