Quick answers
- Does Steven L. Kagen accept Medicare assignment?
- Yes. Medicare's clinician data says Steven L. Kagen 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 L. Kagen see?
- In 2024, CMS data shows 76 Original Medicare patients and 1,706 services for Steven L. Kagen. This counts Original Medicare only and measures volume, not quality.
- What is Steven L. Kagen's NPI number?
- 1235175589. 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 L. Kagen, 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 | 76 |
|---|---|
| Services billed to Medicare | 1,706 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)104 services
- Test to measure the level of nitric oxide gas (95012)35 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)28 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).
- High cholesterol72%
- High blood pressure61%
- Asthma54%
- Arthritis39%
- Anxiety26%
- Chronic kidney disease22%
Hospitals where Steven L. Kagen works
Medicare's Facility Affiliation Data lists Steven L. Kagen at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Thedacare Regional Medical Center - Appleton IncAppleton, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520160
- Thedacare Regional Medical Center - NeenahNeenah, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520045
Practice locations
Addresses where Steven L. Kagen is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 W Lawrence St, Suite 410Appleton, WI 54911 (920) 739‑9100
- 2333 Riverside DrGreen Bay, WI 54301 (920) 432‑8800
- 515 S Washburn StOshkosh, WI 54904 (920) 231‑5900
Specialties
- Allergy/Immunologyprimary
Other allergist and immunologists in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Wisconsin School Of Medicine |
| Graduation year | 1976 (50 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1235175589 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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