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Internal Medicine

Dayaparan Nadarajah, MD

Works at hospitals in Hackettstown, NJ · Morristown, NJ · Newton, NJ … · New Jersey

Summary

Dr. Dayaparan Nadarajah, MD is an internal medicine doctor at 222 High St, Newton, NJ 07860. Phone: (973) 579-5090. Accepts Medicare assignment. In 2024, Dayaparan Nadarajah had 1,637 Original Medicare patients and 13,604 services. NPI 1063492965. 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.

From official Medicare data

This page shows what Medicare's official clinician data says about Dayaparan Nadarajah, 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 Dayaparan Nadarajah accept Medicare assignment?
Yes. Medicare's clinician data says Dayaparan Nadarajah 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 Dayaparan Nadarajah see?
In 2024, CMS data shows 1,637 Original Medicare patients and 13,604 services for Dayaparan Nadarajah. This counts Original Medicare only and measures volume, not quality.
What is Dayaparan Nadarajah's NPI number?
1063492965. 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 Dayaparan Nadarajah, 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 patients1,637
Services billed to Medicare13,604
Different services or procedures67
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)3,799 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)2,225 services
  3. Management using the results of remote vital sign monitoring per calendar month, first 20 minutes (99457)661 services
  4. Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)619 services
  5. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)554 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%
  • Ischemic heart disease49%
  • COPD49%
  • Arthritis44%
  • Diabetes41%

Hospitals where Dayaparan Nadarajah works

Medicare's Facility Affiliation Data lists Dayaparan Nadarajah 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.

  • Ahs Hospital CorpHackettstown, NJ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 310115
  • Morristown Medical CenterMorristown, NJ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 310015
  • Newton Medical CenterNewton, NJ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 310028
  • Overlook Medical CenterSummit, NJ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 310051
  • Saint Clare's Hospital/ Denville CampusDenville, NJ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 310050

Practice locations

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

Group practices

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

  • Pulmonary Medical Associates, LLP2 clinicians in the group

Specialties

Find other Internal Medicine doctors in New Jersey →

Other internal medicine doctors in Newton

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

All internal medicine doctors in Newton →

Other clinicians in Pulmonary Medical Associates, LLP

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

Clinician information

CredentialMD
Graduation year1982 (44 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1063492965
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