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

Individual provider Psychologist · NPI 1972521946

Gretchen A Diem, PHD is a Clinical Psychologist in Madison, Wisconsin. Qualified in 2002, 24 years ago. Accepts Medicare assignment and offers telehealth. Licensed in California and Wisconsin.

Years since qualifying
24
Licensed in
CA, WI
In the registry since
2006
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

700 Rayovac Dr Ste 311
Madison, WI 53711-2476
Phone: (608) 492-0053
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence 2591-57 (WI)
Psychologist Taxonomy 103T00000X · Licence PSY19404 (CA)

Record details

NPI number1972521946
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorNo
NPI enumeratedJuly 18, 2006
Last updated in NPPESApril 8, 2021
Certification dateApril 8, 2021
Mailing address700 Rayovac Drive, Suite 311, Madison, WI 53711-2476

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2002 (24 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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