Louisa Mazza-Hilway, MD

Medicare activity in 2024

Official CMS public-use data for Louisa Mazza-Hilway, 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. Emergency department visit with high level of medical decision making (99285)146 services
2. Emergency department visit with moderate level of medical decision making (99284)79 services
3. Critical care, first 30-74 minutes (99291)17 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%
• Diabetes55%
• Arthritis55%
• Ischemic heart disease46%
• Anxiety41%

Hospitals where Louisa Mazza-Hilway works

Medicare's Facility Affiliation Data lists Louisa Mazza-Hilway 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.

• St Joseph's University Medical Center IncPaterson, NJ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 310019

Practice locations

Addresses where Louisa Mazza-Hilway is enrolled with Medicare (CMS data updated October 2, 2026).

• 224 Hamburg TpkeWayne, NJ 07470 (973) 942‑6900
• 703 Main StPaterson, NJ 07503 (973) 754‑2000

Group practices

Medicare enrollment lists Louisa Mazza-Hilway as a member of this group (CMS data updated October 2, 2026).

• Passaic River Physicians LLC59 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in New Jersey →

Other emergency medicine doctors in Wayne

Clinicians with the same Medicare primary specialty in Wayne, NJ — not a recommendation.

• Nicole A. Yuzuk, DO
• Steven M. Hochman, MD
• Kristin I. Aromolaran, MD
• Rachel H. Donaway, MD
• Joanna W. Whalen, DO
• Joseph J. Bove, DO
• Stacey A. Barnes, DO
• Lindsey A. Tillack, MD

All emergency medicine doctors in Wayne →

Other clinicians in Passaic River Physicians LLC

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

• Nicole A. Yuzuk, DO
• Zoraida Alvarez Gonzalez, DO
• Steven M. Hochman, MD
• Nicole M. Vitrone, NP
• Joanna W. Whalen, DO
• Marjory E. Langer, MD

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