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Anesthesiology

Justin N. Diamond, MD

Works at hospitals in Manhasset, NY · New York

Summary

Dr. Justin N. Diamond, MD is an anesthesiologist at 100 Lafayette Dr, Syosset, NY 11791. Phone: (516) 622-3456. Accepts Medicare assignment. NPI 1295472025. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026.

  • Specialty: Anesthesiologist (Medicare lists Anesthesiology)
  • Address: 100 Lafayette Dr, Syosset, NY 11791 · Directions (1 more location)
  • Phone: (516) 622‑3456
  • Medicare: Accepts Medicare assignment
  • Hospital: North Shore University Hospital
  • Group practice: North Shore - Lij Anesthesiology, PC
  • Medical school: graduated 2022 (4 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Justin N. Diamond, 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 Justin N. Diamond accept Medicare assignment?
Yes. Medicare's clinician data says Justin N. Diamond 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.
What is Justin N. Diamond's NPI number?
1295472025. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Justin N. Diamond works

Medicare's Facility Affiliation Data lists Justin N. Diamond 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.

  • North Shore University HospitalManhasset, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330106

Practice locations

Addresses where Justin N. Diamond is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Justin N. Diamond as a member of this group (CMS data updated October 2, 2026).

  • North Shore - Lij Anesthesiology, PC1,003 clinicians in the group

Specialties

Find other Anesthesiology doctors in New York →

Other anesthesiologists in Syosset

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

All anesthesiologists in Syosset →

Other clinicians in North Shore - Lij Anesthesiology, PC

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

Clinician information

CredentialMD
Graduation year2022 (4 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1295472025
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. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  5. Medicare Care Compare — official Medicare tool to look up clinicians