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Internal Medicine

Cyrus T. Sebastian, MD

Works at hospitals in Summit, NJ · New Jersey

Summary

Dr. Cyrus T. Sebastian, MD is an internal medicine doctor at 99 Beauvoir Ave, Summit, NJ 07902. Phone: (908) 522-2000. Accepts Medicare assignment. In 2024, Cyrus T. Sebastian had 411 Original Medicare patients and 957 services. NPI 1457617680. 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: 99 Beauvoir Ave, Summit, NJ 07902 · Directions
  • Phone: (908) 522‑2000
  • Medicare: Accepts Medicare assignment
  • Hospital: Overlook Medical Center
  • Group practice: Practice Associates Medical Group
  • Medical school: Rutgers R W Johnson Medical School (cam/new Bruns/pisc) · graduated 2010 (16 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Cyrus T. Sebastian, 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 Cyrus T. Sebastian accept Medicare assignment?
Yes. Medicare's clinician data says Cyrus T. Sebastian 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 Cyrus T. Sebastian see?
In 2024, CMS data shows 411 Original Medicare patients and 957 services for Cyrus T. Sebastian. This counts Original Medicare only and measures volume, not quality.
What is Cyrus T. Sebastian's NPI number?
1457617680. 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 Cyrus T. Sebastian, 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 patients411
Services billed to Medicare957
Different services or procedures11
Participating Medicare providerYes
Average age of these patients78

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)404 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)224 services
  3. Hospital discharge day management, more than 30 minutes (99239)224 services
  4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)77 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%
  • Arthritis55%
  • Ischemic heart disease50%
  • Diabetes48%
  • Chronic kidney disease44%

Hospitals where Cyrus T. Sebastian works

Medicare's Facility Affiliation Data lists Cyrus T. Sebastian 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.

  • Overlook Medical CenterSummit, NJ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 310051

Practice locations

Addresses where Cyrus T. Sebastian is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Cyrus T. Sebastian as a member of this group (CMS data updated October 2, 2026).

  • Practice Associates Medical Group1,408 clinicians in the group

Specialties

Find other Internal Medicine doctors in New Jersey →

Other internal medicine doctors in Summit

Clinicians with the same Medicare primary specialty in Summit, NJ — not a recommendation.

All internal medicine doctors in Summit →

Other clinicians in Practice Associates Medical Group

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

Clinician information

CredentialMD
Medical schoolRutgers R W Johnson Medical School (cam/new Bruns/pisc)
Graduation year2010 (16 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1457617680
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