Quick answers
- Does Ellis Whalen accept Medicare assignment?
- Medicare's clinician data says Ellis Whalen may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Ellis Whalen see?
- In 2024, CMS data shows 15 Original Medicare patients and 21 services for Ellis Whalen. This counts Original Medicare only and measures volume, not quality.
- What is Ellis Whalen's NPI number?
- 1861000309. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Ellis Whalen, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 15 |
|---|---|
| Services billed to Medicare | 21 |
| Different services or procedures | 7 |
| Participating Medicare provider | Yes |
| Average age of these patients | 69 |
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
Practice locations
Addresses where Ellis Whalen is enrolled with Medicare (CMS data updated October 2, 2026).
- 2087 S Federal BlvdDenver, CO 80219 (720) 463‑6754
- 4380 Austin Bluffs PkwyColorado Springs, CO 80918 (719) 454‑6010
Group practices
Medicare enrollment lists Ellis Whalen as a member of this group (CMS data updated October 2, 2026).
- Oak Street Health Physicians Group of Colorado PLLC36 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Denver
Clinicians with the same Medicare primary specialty in Denver, CO — not a recommendation.
Other clinicians in Oak Street Health Physicians Group of Colorado PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1861000309 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians