Quick answers
- Does Ricardo Mastrolia accept Medicare assignment?
- Yes. Medicare's clinician data says Ricardo Mastrolia 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 Ricardo Mastrolia see?
- In 2024, CMS data shows 15 Original Medicare patients and 46 services for Ricardo Mastrolia. This counts Original Medicare only and measures volume, not quality.
- What is Ricardo Mastrolia's NPI number?
- 1588853667. 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 Ricardo Mastrolia, 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 | 15 |
|---|---|
| Services billed to Medicare | 46 |
| Different services or procedures | 15 |
| Participating Medicare provider | Yes |
| Average age of these patients | 35 |
Hospitals where Ricardo Mastrolia works
Medicare's Facility Affiliation Data lists Ricardo Mastrolia 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 St Lukes Medical CenterMilwaukee, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520138
Practice locations
Addresses where Ricardo Mastrolia is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 1020 N 12th StMilwaukee, WI 53233 (414) 219‑3056
- 10400 75th StKenosha, WI 53142 (262) 948‑7000
- 12203 N Corporate PkwyMequon, WI 53092
- 8901 W Lincoln AveWest Allis, WI 53227 (414) 329‑5930
- 8905 W Lincoln AveWest Allis, WI 53227 (414) 328‑8480
Group practices
Medicare enrollment lists Ricardo Mastrolia as a member of these groups (CMS data updated October 2, 2026).
- Aurora Medical Group, Inc.3,813 clinicians in the group
- Aurora Advanced Healthcare, Inc.1,124 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Milwaukee
Clinicians with the same Medicare primary specialty in Milwaukee, WI — 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 |
|---|---|
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588853667 |
| 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