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Emergency Medicine

Nicholas L. Aloisio, MD

Works at hospitals in Rochester, NY · Wellsville, NY · New York

Summary

Dr. Nicholas L. Aloisio, MD is an emergency medicine doctor at 601 Elmwood Ave, Rochester, NY 14642. Phone: (585) 275-9555. Accepts Medicare assignment. In 2024, Nicholas L. Aloisio had 414 Original Medicare patients and 465 services. NPI 1942599337. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Emergency medicine doctor (Medicare lists Emergency Medicine)
  • Address: 601 Elmwood Ave, Rochester, NY 14642 · Directions
  • Phone: (585) 275‑9555
  • Medicare: Accepts Medicare assignment
  • Hospitals: Highland Hospital, Jones Memorial Hospital
  • Group practice: Emergency Associates - University of Rochester
  • Medical school: graduated 2011 (15 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Nicholas L. Aloisio, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Nicholas L. Aloisio accept Medicare assignment?
Yes. Medicare's clinician data says Nicholas L. Aloisio 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 Nicholas L. Aloisio see?
In 2024, CMS data shows 414 Original Medicare patients and 465 services for Nicholas L. Aloisio. This counts Original Medicare only and measures volume, not quality.
What is Nicholas L. Aloisio's NPI number?
1942599337. 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 Nicholas L. Aloisio, 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 patients414
Services billed to Medicare465
Different services or procedures23
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Emergency department visit with high level of medical decision making (99285)298 services
  2. Emergency department visit with moderate level of medical decision making (99284)91 services
  3. Critical care, first 30-74 minutes (99291)35 services
  4. Emergency department visit with low level of medical decision making (99283)15 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%
  • Arthritis61%
  • Anxiety55%
  • Depression50%
  • Chronic kidney disease43%

Hospitals where Nicholas L. Aloisio works

Medicare's Facility Affiliation Data lists Nicholas L. Aloisio 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.

  • Highland HospitalRochester, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330164
  • Jones Memorial HospitalWellsville, NY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 330096

Practice locations

Addresses where Nicholas L. Aloisio is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Nicholas L. Aloisio as a member of this group (CMS data updated October 2, 2026).

  • Emergency Associates - University of Rochester66 clinicians in the group

Specialties

Find other Emergency Medicine doctors in New York →

Other emergency medicine doctors in Rochester

Clinicians with the same Medicare primary specialty in Rochester, NY — not a recommendation.

All emergency medicine doctors in Rochester →

Other clinicians in Emergency Associates - University of Rochester

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

Clinician information

CredentialMD
Graduation year2011 (15 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1942599337
CorrectionsReport 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

  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