NPPES file of Aug 9, 2026

Thomas David Marx, PHD

Clinical Psychologist · Greenfield, WI

Thomas David Marx, PHD is a clinical psychologist with a practice address in Greenfield, Wisconsin, and NPI 1790895233, issued on Aug 30, 2006. Check the license (Wisconsin 594057, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1790895233
Name
Thomas David Marx
Credential
PHD
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
594057 WI
Self-reported in NPPES; status is on the state search
Practice location
4848 S 76TH St, Greenfield, WI 53220
Phone
(414) 325-7741
Enumerated
Aug 30, 2006
Record last updated
Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(414) 325-7735
Medicaid ID
39057300 WI
Medicare enrollment
Enrolled (PECOS I20041021000227); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest clinical psychologist records → All 728 in Wisconsin → Look up another NPI →

Also registered at 4848 S 76TH St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Koreen Bliffert, CRTPulmonary Rehabilitation Certified Respiratory Therapist1174531529
  2. Robert Brueggeman, M.D.Internal Medicine Physician1255324273
  3. Ann Cates, P.T.Physical Therapist1013956226
  4. Michael Chen, D.C..Chiropractor1649484221
  5. Katherine Dibb, CSAC, LPCProfessional Counselor1629245725
  6. Cheryl Dominski, M.D.Internal Medicine Physician1285627976

Verify Thomas David Marx in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
    Search for license 594057    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Wisconsin license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Stress Management And Mental Health ClinicsWest Allis, WI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Thomas David Marx among 728 clinical psychologist records in Wisconsin

Thomas David Marx, PHD is one of 728 clinical 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. Its NPI, issued in 2006, is newer than 3% of them.

  • NPI issued2006 · 3% of these records are older, 68% newer
  • In a Medicare fileYes · 27% of these records are
  • In the CMS Doctors and Clinicians fileYes · 34% of these records are
  • Graduated1972 · median 2009 among the 244 with a school on file
  • Record last updated2007 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Clinical Psychologist providers in Wisconsin

There are 728 clinical psychologist records in Wisconsin.

All 728 in Wisconsin → Every provider in Greenfield → Clinical Psychologist nationwide →

The 8 clinical psychologist records with the nearest ZIP codes

  1. Monica Garcia, PHDGreenfield, WI 532201982330445
  2. Alyssa Greer, PH.D.Greenfield, WI 532201902938590
  3. Anthony Jurek, PH.DGreenfield, WI 532201407029507
  4. Amelia Brost, PSY.D.Milwaukee, WI 532211477883023
  5. Samantha Klockow, PSYD, LPGreenfield, WI 532211457860884
  6. William Reyes, PHDMilwaukee, WI 532211326372178
  7. Mary Hicks, PH.D.Milwaukee, WI 532221144434333
  8. Richard Hohfeler, PSYDWauwatosa, WI 532221881694701

Common questions

What is Thomas David Marx, PHD's NPI number?

Thomas David Marx, PHD's National Provider Identifier (NPI) is 1790895233, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Thomas David Marx, PHD located?

The NPPES record lists a practice address at 4848 S 76TH St, Greenfield, WI, 53220. Phone: (414) 325-7741. Providers update this record themselves, so call before visiting.

How can I verify Thomas David Marx, PHD's license?

NPPES lists Wisconsin license number 594057, 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. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.