NPPES file of Aug 9, 2026

Elizabeth Whitley Lassen, PSYD

Clinical Psychologist · Louisville, CO

Elizabeth Whitley Lassen, PSYD is a clinical psychologist with a practice address in Louisville, Colorado, and NPI 1457684938, issued on Sep 15, 2009. Check the license (Colorado PSY.4381, as entered in NPPES) with the Colorado 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
1457684938
Name
Elizabeth Whitley Lassen
Credential
PSYD
Primary taxonomy
Clinical Psychologist 103TC0700X
License numbers
PSY.4381 CO
PSY25272 CA
Self-reported in NPPES; status is on the state search
Practice location
80 Health Park Dr Ste 270, Louisville, CO 80027
Phone
(303) 661-4100
Enumerated
Sep 15, 2009
Record last updated
Feb 21, 2025
Fax
(720) 321-8969
Medicare enrollment
Enrolled (PECOS I20170801002949); 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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Also registered at 80 Health Park Dr Ste 270

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

  1. Ashish ChavdaInterventional Pain Medicine Physician1447549563
  2. Matthew Gawart, M.D.Surgery Physician1285881474
  3. John Grauer, M.D.Sports Medicine (Orthopaedic Surgery) Physician1376554741
  4. Scott Hallgren, D.O., F.A.C.P.Gastroenterology Physician1205929841
  5. Jeremy James, PA-CPhysician Assistant1942535067
  6. Colin Leffert, DOGastroenterology Physician1881127140

Verify Elizabeth Whitley Lassen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Colorado board licenses this profession
    Search for license PSY.4381    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 Colorado 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. Portercare Adventist Health SystemLouisville, CO

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

11 clinical psychologist records list a practice address in Louisville

They are 11 of the 785 NPPES records with a practice address in Louisville, and 1,652 clinical psychologist records in Colorado.

All 11 in Louisville → All 1,652 in Colorado → Every provider in Louisville →

Other clinical psychologist records in Colorado

  1. Jeannine Abbott, PSYDEdwards, CO1225121767
  2. Monica Abdul-Chani, PHDDenver, CO1922988260
  3. Natalie Abramson, PHDAurora, CO1568559615
  4. Joyce Ackerman, ED.D.Greeley, CO1548255565
  5. Gail Adams, PSY.D.Centennial, CO1992916324
  6. Francis Addrisi, PHDMeeker, CO1932227584
  7. Stuart Adelman, PH.D.Denver, CO1548206378
  8. Amber Adkins, PH.D.Wadsworth, CO1356448831
  9. Christina Aegerter, PSYDDenver, CO1447685391
  10. Jenny Agbortogho, PSY.D.Littleton, CO1114860467

Common questions

What is Elizabeth Whitley Lassen, PSYD's NPI number?

Elizabeth Whitley Lassen, PSYD's National Provider Identifier (NPI) is 1457684938, issued on Sep 15, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Elizabeth Whitley Lassen, PSYD located?

The NPPES record lists a practice address at 80 Health Park Dr Ste 270, Louisville, CO, 80027. Phone: (303) 661-4100. Providers update this record themselves, so call before visiting.

How can I verify Elizabeth Whitley Lassen, PSYD's license?

NPPES lists Colorado license number PSY.4381, as entered by the provider. Search the Colorado 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.