Quick answers
- Does Katherine R. Stevenson accept Medicare assignment?
- Yes. Medicare's clinician data says Katherine R. Stevenson 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 Katherine R. Stevenson see?
- In 2024, CMS data shows 234 Original Medicare patients and 1,131 services for Katherine R. Stevenson. This counts Original Medicare only and measures volume, not quality.
- What is Katherine R. Stevenson's NPI number?
- 1447223037. 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 Katherine R. Stevenson, 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 | 234 |
|---|---|
| Services billed to Medicare | 1,131 |
| Different services or procedures | 56 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)61 services
- Electronic assessment of bladder emptying (51741)60 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)60 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)50 services
- Diagnostic exam of bladder and urethra using an endoscope (52000)47 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 cholesterol73%
- High blood pressure65%
- Arthritis50%
- Anxiety30%
- Depression27%
- Osteoporosis26%
Hospitals where Katherine R. Stevenson works
Medicare's Facility Affiliation Data lists Katherine R. Stevenson 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.
- Aurora Medical Center - SummitSummit, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520206
- Oconomowoc Memorial HospitalOconomowoc, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520062
- Waukesha Memorial HospitalWaukesha, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520008
Practice locations
Addresses where Katherine R. Stevenson is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 195 Discovery DrBrookfield, WI 53045
- 240 Maple AveMukwonago, WI 53149 (262) 928‑1900
- 721 American AveWaukesha, WI 53188
- 725 American AveWaukesha, WI 53188
- 791 Summit AveOconomowoc, WI 53066
Group practices
Medicare enrollment lists Katherine R. Stevenson as a member of this group (CMS data updated October 2, 2026).
- Prohealth Medical Group Inc479 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Brookfield
Clinicians with the same Medicare primary specialty in Brookfield, WI — not a recommendation.
Other clinicians in Prohealth Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447223037 |
| 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