Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Elizabeth Whitley Lassen, PSYD

Individual provider Clinical Psychologist · NPI 1457684938

Dr. Elizabeth Whitley Lassen, PSYD is a Clinical Psychologist in Louisville, Colorado. Qualified in 2011, 15 years ago. Practices with Portercare Adventist Health System, a 767-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California and Colorado.

Years since qualifying
15
Licensed in
CA, CO
In the registry since
2009
Specialties on file
2
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

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Practice location Address checks out

80 Health Park Dr Ste 270
Louisville, CO 80027-4644
Phone: (303) 661-4100
Fax: (720) 321-8969
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1650 38th St Ste 100e, Boulder, CO 80301-2624 — (720) 254-1389

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PSY.4381 (CO)
Clinical Psychologist Taxonomy 103TC0700X · Licence PSY25272 (CA)

Record details

NPI number1457684938
Entity typeIndividual (Type 1)
GenderFemale
Credentials PSYD
Sole proprietorYes
NPI enumeratedSeptember 15, 2009
Last updated in NPPESFebruary 21, 2025
Certification dateFebruary 21, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2011 (15 years in practice)
Group practice Portercare Adventist Health System — 767 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients38
Services billed 406 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Portercare Adventist Health System

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 767 clinicians in the practice; 12 are shown here.

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