NPPES file of Aug 9, 2026

Sean Wesley Marquardt, PSY.D

Clinical Psychologist · Milwaukee, WI

Sean Wesley Marquardt, PSY.D is a clinical psychologist with a practice address in Milwaukee, Wisconsin, and NPI 1740645100, issued on Dec 29, 2015. Check the license (Wisconsin 3487-57, 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
1740645100
Name
Sean Wesley Marquardt
Credential
PSY.D
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
3487-57 WI
Self-reported in NPPES; status is on the state search
Practice location
5000 W National Ave, Milwaukee, WI 53295
Phone
(414) 384-2000
Enumerated
Dec 29, 2015
Record last updated
Aug 1, 2017 (not updated in 9 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20180718000979); 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 5000 W National Ave

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

  1. Victoria Adams, PHARMDPharmacist1457639692
  2. Keighlynn Adlof, PSYDClinical Psychologist1215385489
  3. Noah Adrians, PH. D.Psychologist1487934683
  4. Karen Adwan, PHARM.D., CGPPharmacist1518062553
  5. Barbara Alberti, RN, APNPFamily Nurse Practitioner1750568465
  6. Jason Val Alegro, PHARM.D.Pharmacist1487010781

Verify Sean Wesley Marquardt 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 3487-57    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. Prohealth Medical Group IncWaukesha, WI

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

Sean Wesley Marquardt among 728 clinical psychologist records in Wisconsin

Sean Wesley Marquardt, PSY.D 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 2015, is newer than 66% of them.

  • NPI issued2015 · 66% of these records are older, 30% newer
  • In a Medicare fileYes · 27% of these records are
  • In the CMS Doctors and Clinicians fileYes · 34% of these records are
  • Graduated2014 · median 2009 among the 244 with a school on file
  • Record last updated2017 · 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 Milwaukee → Clinical Psychologist nationwide →

The 8 clinical psychologist records with the nearest ZIP codes

  1. J. David Carroll, PH.D.Milwaukee, WI 532951043230667
  2. Peter Graskamp, PHDMilwaukee, WI 532951023024791
  3. Robert Gresen, PH.D.Milwaukee, WI 532951841210937
  4. Michael Haight, PSY.D.Milwaukee, WI 532951104846807
  5. James Hart, PH.D.Milwaukee, WI 532951891715512
  6. James Hastings, PH.DMilwaukee, WI 532951538181136
  7. Patrick Martin, PH.D.Milwaukee, WI 532951700997046
  8. Alison Minkin, PH.D.Milwaukee, WI 532951629224993

Common questions

What is Sean Wesley Marquardt, PSY.D's NPI number?

Sean Wesley Marquardt, PSY.D's National Provider Identifier (NPI) is 1740645100, issued on Dec 29, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Sean Wesley Marquardt, PSY.D located?

The NPPES record lists a practice address at 5000 W National Ave, Milwaukee, WI, 53295. Phone: (414) 384-2000. Providers update this record themselves, so call before visiting.

How can I verify Sean Wesley Marquardt, PSY.D's license?

NPPES lists Wisconsin license number 3487-57, 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. 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.