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Internal Medicine

Stephen Jesmajian, MD

Works at hospitals in New Rochelle, NY · New York

Summary

Dr. Stephen Jesmajian, MD is an internal medicine doctor at 16 Guion Pl, New Rochelle, NY 10801. Phone: (914) 365-4065. Accepts Medicare assignment. In 2024, Stephen Jesmajian had 157 Original Medicare patients and 316 services. NPI 1750341715. 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: 16 Guion Pl, New Rochelle, NY 10801 · Directions
  • Phone: (914) 365‑4065
  • Medicare: Accepts Medicare assignment
  • Hospital: Montefiore New Rochelle Hospital
  • Group practice: Montefiore New Rochelle Hospital
  • Medical school: graduated 1984 (42 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Stephen Jesmajian, 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 Stephen Jesmajian accept Medicare assignment?
Yes. Medicare's clinician data says Stephen Jesmajian 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 Stephen Jesmajian see?
In 2024, CMS data shows 157 Original Medicare patients and 316 services for Stephen Jesmajian. This counts Original Medicare only and measures volume, not quality.
What is Stephen Jesmajian's NPI number?
1750341715. 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 Stephen Jesmajian, 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 patients157
Services billed to Medicare316
Different services or procedures9
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)157 services
  2. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)115 services
  3. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)29 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%
  • Diabetes37%
  • Ischemic heart disease31%
  • Chronic kidney disease28%

Hospitals where Stephen Jesmajian works

Medicare's Facility Affiliation Data lists Stephen Jesmajian 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.

  • Montefiore New Rochelle HospitalNew Rochelle, NY · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 330184

Practice locations

Addresses where Stephen Jesmajian is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Stephen Jesmajian as a member of this group (CMS data updated October 2, 2026).

  • Montefiore New Rochelle Hospital62 clinicians in the group

Specialties

Find other Internal Medicine doctors in New York →

Other internal medicine doctors in New Rochelle

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

All internal medicine doctors in New Rochelle →

Other clinicians in Montefiore New Rochelle Hospital

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

Clinician information

CredentialMD
Graduation year1984 (42 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1750341715
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