Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Louisa Mazza-Hilway, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1225591423

Louisa Mazza-Hilway, MD practises Emergency Medicine in Paterson, New Jersey. Graduated from Rutgers New Jersey Medical School in 2019, 7 years ago. Practices with Passaic River Physicians LLC, a 57-clinician group and accepts Medicare assignment. Licensed in New Jersey.

Years since qualifying
7
Trained at
Rutgers New Jersey Medical School
Licensed in
NJ
In the registry since
2019
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

Paterson, NJ

No coordinates on file. Search this address in Google Maps

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 25MA11282700 (NJ)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1225591423
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 13, 2019
Last updated in NPPESApril 19, 2022
Certification dateApril 19, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolRUTGERS NEW JERSEY MEDICAL SCHOOL
Graduated 2019 (7 years in practice)
Group practice Passaic River Physicians Llc — 57 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients234
Services billed 270 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Passaic River Physicians LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 57 clinicians in the practice; 12 are shown here.

Other providers in Paterson