Michael L. Hammer, PHD
Psychologist · Prairie Du Sac, WI
Michael L. Hammer, PHD is a psychologist with a practice address in Prairie Du Sac, Wisconsin, and NPI 1629035324, issued on Apr 27, 2006. Check the license (Wisconsin 1828, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michael L. Hammer
- Credential
- PHD
- Primary taxonomy
- Psychologist 103T00000X
- License number
- 1828 WI
Self-reported in NPPES; status is on the state search - Practice location
- 560 4TH St, Prairie Du Sac, WI 53578
- Phone
- (608) 643-3663
- Enumerated
- Apr 27, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (608) 643-5014
- Medicaid ID
- 39107900 WI
- Medicare enrollment
- Enrolled (PECOS I20110304000735); 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 560 4TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Breana KirchSocial Worker1235852831
- Jean McElhaney, MS LPC LCSWClinical Social Worker1871550517
- Erin Mohrbacker-Tellier, PSY.D., LPC, CSACMental Health Counselor1366841892
- Michael Orrico, PH.D.Psychologist1427255678
- James Williams, MSW LCSWSocial Worker1215959812
Verify Michael L. Hammer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 1828Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Pathway TO Wellness Community Clinic SCPrairie Du Sac, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael L. Hammer among 949 psychologist records in Wisconsin
Michael L. Hammer, 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. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 62% newer
- In a Medicare fileYes · 27% of these records are
- In the CMS Doctors and Clinicians fileYes · 31% of these records are
- Graduated1991 · median 2006 among the 292 with a school on file
- Record last updated2026 · 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).
Psychologist providers in Wisconsin
There are 949 psychologist records in Wisconsin.
All 949 in Wisconsin → Every provider in Prairie Du Sac → Psychologist nationwide →
The 8 psychologist records with the nearest ZIP codes
- Michael Orrico, PH.D.Prairie Du Sac, WI 535781427255678
- Sarah Polyak, PSYDOregon, WI 535751942729611
- Robert Beck, PHDMonroe, WI 535661457400541
- Susan Brown, PSYDMonroe, WI 535661891834503
- Pamela Corrado, PSY.DMonroe, WI 535661184773236
- Raymond Koziol, PHDSun Prairie, WI 535901447286653
- James Leclair, PHDSun Prairie, WI 535901992894950
- Brian Mamott, PHDMonroe, WI 535661326197484
Common questions
What is Michael L. Hammer, PHD's NPI number?
Michael L. Hammer, PHD's National Provider Identifier (NPI) is 1629035324, issued on Apr 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael L. Hammer, PHD located?
The NPPES record lists a practice address at 560 4TH St, Prairie Du Sac, WI, 53578. Phone: (608) 643-3663. Providers update this record themselves, so call before visiting.
How can I verify Michael L. Hammer, PHD's license?
NPPES lists Wisconsin license number 1828, 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.
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.