Quick answers
- Does Mary L. Geralts accept Medicare assignment?
- Yes. Medicare's clinician data says Mary L. Geralts 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 Mary L. Geralts see?
- In 2024, CMS data shows 253 Original Medicare patients and 802 services for Mary L. Geralts. This counts Original Medicare only and measures volume, not quality.
- What is Mary L. Geralts's NPI number?
- 1386759397. 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 Mary L. Geralts, 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 | 253 |
|---|---|
| Services billed to Medicare | 802 |
| Different services or procedures | 33 |
| 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)353 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)153 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)69 services
- Influenza vaccine split virus, preservative free (90662)37 services
- Administration of influenza virus vaccine (G0008)37 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 blood pressure68%
- High cholesterol66%
- Arthritis36%
- Chronic kidney disease25%
- Osteoporosis20%
- Diabetes19%
Hospitals where Mary L. Geralts works
Medicare's Facility Affiliation Data lists Mary L. Geralts 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.
- Ascension SE Wisconsin HospitalMilwaukee, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520136
- 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 Mary L. Geralts is enrolled with Medicare (CMS data updated October 2, 2026).
- 600 Walnut Ridge DrHartland, WI 53029 (262) 369‑7040
Group practices
Medicare enrollment lists Mary L. Geralts as a member of this group (CMS data updated October 2, 2026).
- Aurora Medical Group, Inc.3,813 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Other clinicians in Aurora Medical Group, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1986 (40 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386759397 |
| 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