Quick answers
- Does Marc-Antoine Tremblay accept Medicare assignment?
- Yes. Medicare's clinician data says Marc-Antoine Tremblay 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 Marc-Antoine Tremblay see?
- In 2024, CMS data shows 148 Original Medicare patients and 3,510 services for Marc-Antoine Tremblay. This counts Original Medicare only and measures volume, not quality.
- What is Marc-Antoine Tremblay's NPI number?
- 1558892232. 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 Marc-Antoine Tremblay, 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 | 148 |
|---|---|
| Services billed to Medicare | 3,510 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)2,684 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)80 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)60 services
- Aspiration and/or injection of fluid from large joint (20610)46 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)24 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 pressure75%
- Arthritis75%
- High cholesterol74%
- Depression36%
- Anxiety35%
- Chronic kidney disease33%
Hospitals where Marc-Antoine Tremblay works
Medicare's Facility Affiliation Data lists Marc-Antoine Tremblay 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 CenterGrafton, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520207
- Aurora Medical Center - SummitSummit, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520206
- Aurora St Lukes Medical CenterMilwaukee, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520138
- West Allis Memorial HospitalWest Allis, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520139
Practice locations
Addresses where Marc-Antoine Tremblay is enrolled with Medicare (CMS data updated October 2, 2026).
- 2424 S 90th St, Suite 500West Allis, WI 53227 (414) 321‑2255
Group practices
Medicare enrollment lists Marc-Antoine Tremblay as a member of this group (CMS data updated October 2, 2026).
- Aurora Advanced Healthcare, Inc.1,124 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Other clinicians in Aurora Advanced Healthcare, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Virginia Commonwealth University, School Of Medicine |
| Graduation year | 2017 (9 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558892232 |
| 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