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Internal Medicine

Bagdig S. Baghdassarian, MD

Works at hospitals in Manhasset, NY · New York, NY · New York

Summary

Dr. Bagdig S. Baghdassarian, MD is an internal medicine doctor at 15 Arleigh Rd, Great Neck, NY 11021. Phone: (516) 566-1139. Accepts Medicare assignment. In 2024, Bagdig S. Baghdassarian had 703 Original Medicare patients and 3,802 services. NPI 1942253158. 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: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 15 Arleigh Rd, Great Neck, NY 11021 · Directions (1 more location)
  • Phone: (516) 566‑1139
  • Medicare: Accepts Medicare assignment
  • Hospitals: North Shore University Hospital, NYU Langone Hospitals
  • Medical school: State University Of New York At Stony Brook, School Of Medicine · graduated 1987 (39 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Bagdig S. Baghdassarian, 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 Bagdig S. Baghdassarian accept Medicare assignment?
Yes. Medicare's clinician data says Bagdig S. Baghdassarian 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 Bagdig S. Baghdassarian see?
In 2024, CMS data shows 703 Original Medicare patients and 3,802 services for Bagdig S. Baghdassarian. This counts Original Medicare only and measures volume, not quality.
What is Bagdig S. Baghdassarian's NPI number?
1942253158. 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 Bagdig S. Baghdassarian, 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 patients703
Services billed to Medicare3,802
Different services or procedures11
Participating Medicare providerYes
Average age of these patients82

Most frequent services

  1. Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)1,008 services
  2. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)953 services
  3. Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)639 services
  4. Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)416 services
  5. Nursing facility discharge management, more than 30 minutes (99316)248 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%
  • Ischemic heart disease58%
  • Diabetes53%
  • Chronic kidney disease52%

Hospitals where Bagdig S. Baghdassarian works

Medicare's Facility Affiliation Data lists Bagdig S. Baghdassarian 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
  • NYU Langone HospitalsNew York, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330214

Practice locations

Addresses where Bagdig S. Baghdassarian is enrolled with Medicare (CMS data updated October 2, 2026).

Specialties

Find other Internal Medicine doctors in New York →

Other internal medicine doctors in Great Neck

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

All internal medicine doctors in Great Neck →

Clinician information

CredentialMD
Medical schoolState University Of New York At Stony Brook, School Of Medicine
Graduation year1987 (39 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1942253158
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