Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Ellis Denn Whalen, FNP-BC

Individual provider Family Nurse Practitioner · NPI 1861000309

Ellis Denn Whalen, FNP-BC is a Nurse Practitioner in Eugene, Oregon. Qualified in 2022, 4 years ago. Practices with Oak Street Health Physicians Group of Colorado PLLC, a 34-clinician group and works from 2 locations. Licensed in Colorado and Oregon.

Years since qualifying
4
Licensed in
CO, OR
In the registry since
2020
Specialties on file
4
What do these letters mean?
FNP-BC — Family Nurse Practitioner, Board Certified
A family nurse practitioner certified by the ANCC.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1680 Chambers St Ste 103
Eugene, OR 97402-3655
Phone: (541) 682-3550
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2087 S Federal Blvd, Denver, CO 80219-5429 — (720) 463-6754

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 10000925 (OR)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence APN.1000806-NP (CO)
Registered Nurse Taxonomy 163W00000X · Licence 202010323RN (OR)
Registered Nurse Taxonomy 163W00000X · Licence RN.1644253 (CO)

Record details

NPI number1861000309
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP-BC
Sole proprietorNo
NPI enumeratedJuly 21, 2020
Last updated in NPPESOctober 16, 2025
Certification dateOctober 16, 2025

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Oak Street Health Physicians Group Of Colorado Pllc — 34 clinicians
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

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 patients15
Services billed 21 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

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 Oak Street Health Physicians Group of Colorado PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 34 clinicians in the practice; 12 are shown here.

Other providers in Eugene