Louis J. Mariorenzi, MD

Medicare activity in 2024

Official CMS public-use data for Louis J. Mariorenzi, 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.

Most frequent services

1. Injection, dexamethasone sodium phosphate, 1 mg (J1100)388 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)114 services
3. X-ray of knee, 1-2 views (73560)109 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)87 services
5. Aspiration and/or injection of fluid from large joint (20610)71 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%
• High cholesterol75%
• Arthritis75%
• Anxiety32%
• Diabetes28%
• Ischemic heart disease27%

Hospitals where Louis J. Mariorenzi works

Medicare's Facility Affiliation Data lists Louis J. Mariorenzi 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.

• Roger Williams Medical CenterProvidence, RI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 410004

Practice locations

Addresses where Louis J. Mariorenzi is enrolled with Medicare (CMS data updated October 2, 2026).

• 2 Dudley St, Suite 200Providence, RI 02905 (401) 457‑1500

Group practices

Medicare enrollment lists Louis J. Mariorenzi as a member of this group (CMS data updated October 2, 2026).

• University Orthopedics Inc196 clinicians in the group

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in Rhode Island →

Other orthopedic surgeons in Providence

Clinicians with the same Medicare primary specialty in Providence, RI — not a recommendation.

• Stephen E. Marcaccio, MD
• Peter Pizzarello, MD
• John R. Parker, MD
• Michael C. Mariorenzi, MD
• James Maher, MD
• Stephen B. Gross, MD
• Katherine Dong, MD
• Brian Cohen, MD

All orthopedic surgeons in Providence →

Other clinicians in University Orthopedics Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Stephen E. Marcaccio, MD
• Jason T. Wilhelm, NP
• Nora Kinslow, OT
• Simon Cornelissen, MD
• Andrew Chen, MD
• Elizabeth Welch

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians