Quick answers
- Does Carolyn P. Butler accept Medicare assignment?
- Yes. Medicare's clinician data says Carolyn P. Butler 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 Carolyn P. Butler see?
- In 2024, CMS data shows 1,194 Original Medicare patients and 2,250 services for Carolyn P. Butler. This counts Original Medicare only and measures volume, not quality.
- What is Carolyn P. Butler's NPI number?
- 1831156835. 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 Carolyn P. Butler, 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 | 1,194 |
|---|---|
| Services billed to Medicare | 2,250 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient complete exam of visual system (92014)816 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)549 services
- Exam of visual field with extended testing (92083)224 services
- Imaging of optic nerve (92133)214 services
- Imaging of retina (92134)208 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 cholesterol75%
- High blood pressure73%
- Arthritis40%
- Diabetes28%
- Ischemic heart disease28%
- Chronic kidney disease25%
Hospitals where Carolyn P. Butler works
Medicare's Facility Affiliation Data lists Carolyn P. Butler 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.
- Waukesha Memorial HospitalWaukesha, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520008
Practice locations
Addresses where Carolyn P. Butler is enrolled with Medicare (CMS data updated October 2, 2026).
- 400 Bay View RdMukwonago, WI 53149 (262) 363‑5333
- N19W23993 Ridgeview Pkwy W, Suite 100Waukesha, WI 53188 (262) 547‑3352
Group practices
Medicare enrollment lists Carolyn P. Butler as a member of this group (CMS data updated October 2, 2026).
- Medical Eye Associates SC9 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Other clinicians in Medical Eye Associates SC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Wisconsin School Of Medicine |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1831156835 |
| 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