Gretchen A. Diem, PHD
Psychologist · Madison, WI
Gretchen A. Diem, PHD is a psychologist with a practice address in Madison, Wisconsin, and NPI 1972521946, issued on Jul 18, 2006. Check the license (Wisconsin 2591-57, as entered in NPPES) with the Wisconsin board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gretchen A. Diem
- Credential
- PHD
- Primary taxonomy
- Psychologist 103T00000X
- License numbers
- 2591-57 WI
PSY19404 CA
Self-reported in NPPES; status is on the state search - Practice location
- 700 Rayovac Drive, Madison, WI 53711
- Phone
- (608) 492-0053
- Enumerated
- Jul 18, 2006
- Record last updated
- Apr 8, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090609000130); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychologist records → All 949 in Wisconsin → Look up another NPI →
Also registered at 700 Rayovac Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kimberly TuescherProfessional Counselor1699011619
- Aishling Watson, FNP-BC, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1326583428
Verify Gretchen A. Diem in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 2591-57Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gretchen A. Diem among 949 psychologist records in Wisconsin
Gretchen A. Diem, PHD is one of 949 psychologist records with a practice address in Wisconsin. 27% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 62% newer
- In a Medicare fileNo · 27% of these records are
- In the CMS Doctors and Clinicians fileYes · 31% of these records are
- Graduated2002 · median 2006 among the 292 with a school on file
- Record last updated2021 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103T00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
209 psychologist records list a practice address in Madison
They are 209 of the 15,014 NPPES records with a practice address in Madison, and 949 psychologist records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 949 in Wisconsin → Every provider in Madison → Psychologist nationwide →
The 8 psychologist records with the nearest ZIP codes
- Heather Abercrombie, PHDMadison, WI 537111275509333
- Lynn Catlin, PH.D.Madison, WI 537111831376011
- Robert Hodes, PHDMadison, WI 537111790796415
- Douglas Jorenby, PHDMadison, WI 537111235105271
- Lawrence Mandt, PH.D.Madison, WI 537111255361002
- Shilagh Mirgain, PHDMadison, WI 537111477517027
- Meera Rastogi, LIC. PSYCHOLOGISTMadison, WI 537111023235462
- Janice Singles, PSYDMadison, WI 537111497719074
Common questions
What is Gretchen A. Diem, PHD's NPI number?
Gretchen A. Diem, PHD's National Provider Identifier (NPI) is 1972521946, issued on Jul 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gretchen A. Diem, PHD located?
The NPPES record lists a practice address at 700 Rayovac Drive, Madison, WI, 53711. Phone: (608) 492-0053. Providers update this record themselves, so call before visiting.
How can I verify Gretchen A. Diem, PHD's license?
NPPES lists Wisconsin license number 2591-57, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.