NPPES file of Aug 9, 2026

Courtney Derus

Psychologist · Wausau, WI

Courtney Derus is a psychologist with a practice address in Wausau, Wisconsin, and NPI 1255765335, issued on Aug 26, 2013. Check the license (Wisconsin 3605-57, 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
1255765335
Name
Courtney Derus
Primary taxonomy
Psychologist 103T00000X
License number
3605-57 WI
Self-reported in NPPES; status is on the state search
Practice location
114 Grand Ave, Wausau, WI 54403
Phone
(715) 845-7175
Enumerated
Aug 26, 2013
Record last updated
Oct 2, 2018 (not updated in 8 years: call before relying on the address or phone)
Fax
(715) 845-7142
Medicare enrollment
Enrolled (PECOS I20181130002166); may accept Medicare assignment
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 psychologist records → All 949 in Wisconsin → Look up another NPI →

Also registered at 114 Grand Ave

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

  1. Ashley Abrams, LPC-ITMental Health Counselor1164949319
  2. Colleen Angel, LPC-ITProfessional Counselor1649718917
  3. Lisa Berry, LPCProfessional Counselor1710006523
  4. Dennis Elmergreen, MA, LPCMental Health Counselor1588218861
  5. Kandace Elmergreen, MSClinical Social Worker1497874291
  6. Natasha Elmergreen, LPC-ITProfessional Counselor1144115411

Verify Courtney Derus 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 3605-57    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. Elmergreen Associates, LLCWausau, WI

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

Courtney Derus among 949 psychologist records in Wisconsin

Courtney Derus 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 2013, is newer than 66% of them.

  • NPI issued2013 · 66% of these records are older, 30% newer
  • In a Medicare fileYes · 27% of these records are
  • In the CMS Doctors and Clinicians fileYes · 31% of these records are
  • Graduated2017 · median 2006 among the 292 with a school on file
  • Record last updated2018 · 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 Wausau → Psychologist nationwide →

The 8 psychologist records with the nearest ZIP codes

  1. Eric Anderson, PHDWausau, WI 544031205906179
  2. Patrick Lacy, PH.D.Wausau, WI 544031245307388
  3. William Schmelzer, PHDWausau, WI 544031558496984
  4. Jonathon Snider, PSY.D.Wausau, WI 544031720275530
  5. Claire Udell, PSY.D.Wausau, WI 544031295360436
  6. Anthony Gillette, PHDWausau, WI 544011174564645
  7. Paul Hesse, PH.D.Wausau, WI 544011164552477
  8. Jeffrey Molter, PH.D.Wausau, WI 544011326258633

Common questions

What is Courtney Derus's NPI number?

Courtney Derus's National Provider Identifier (NPI) is 1255765335, issued on Aug 26, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Courtney Derus located?

The NPPES record lists a practice address at 114 Grand Ave, Wausau, WI, 54403. Phone: (715) 845-7175. Providers update this record themselves, so call before visiting.

How can I verify Courtney Derus's license?

NPPES lists Wisconsin license number 3605-57, 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.