Quick answers
- Does Steven J. Kallsen accept Medicare assignment?
- Yes. Medicare's clinician data says Steven J. Kallsen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Steven J. Kallsen see?
- In 2024, CMS data shows 27 Original Medicare patients and 27 services for Steven J. Kallsen. This counts Original Medicare only and measures volume, not quality.
- What is Steven J. Kallsen's NPI number?
- 1982658449. 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 Steven J. Kallsen, 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 | 27 |
|---|---|
| Services billed to Medicare | 27 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Anesthesia for other procedure on lower spine (00630)11 services
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).
- Arthritis75%
- High cholesterol74%
- High blood pressure52%
Practice locations
Addresses where Steven J. Kallsen is enrolled with Medicare (CMS data updated October 2, 2026).
- 11 W Dry Creek Cir, Suite 120Littleton, CO 80120 (303) 951‑8100
- 5060 S Syracuse StDenver, CO 80237 (303) 606‑7115
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Colorado →
Other nurse anesthetists in Littleton
Clinicians with the same Medicare primary specialty in Littleton, CO — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1982658449 |
| 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