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Internal Medicine

Elena A. Merino, MD

Works at hospitals in Morristown, NJ · New Jersey

Summary

Dr. Elena A. Merino, MD is an internal medicine doctor at 100 Madison Ave, Morristown, NJ 07960. Phone: (973) 971-5000. Accepts Medicare assignment. In 2024, Elena A. Merino had 76 Original Medicare patients and 133 services. NPI 1346827953. 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: 100 Madison Ave, Morristown, NJ 07960 · Directions
  • Phone: (973) 971‑5000
  • Medicare: Accepts Medicare assignment
  • Hospital: Morristown Medical Center
  • Group practice: Practice Associates Medical Group
  • Medical school: graduated 2017 (9 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Elena A. Merino, 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 Elena A. Merino accept Medicare assignment?
Yes. Medicare's clinician data says Elena A. Merino 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 Elena A. Merino see?
In 2024, CMS data shows 76 Original Medicare patients and 133 services for Elena A. Merino. This counts Original Medicare only and measures volume, not quality.
What is Elena A. Merino's NPI number?
1346827953. 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 Elena A. Merino, 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 patients76
Services billed to Medicare133
Different services or procedures5
Participating Medicare providerYes
Average age of these patients79

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)121 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 disease63%
  • Chronic kidney disease59%
  • Heart failure58%
  • Arthritis57%

Hospitals where Elena A. Merino works

Medicare's Facility Affiliation Data lists Elena A. Merino 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.

  • Morristown Medical CenterMorristown, NJ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 310015

Practice locations

Addresses where Elena A. Merino is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Elena A. Merino 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 Morristown

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

All internal medicine doctors in Morristown →

Other clinicians in Practice Associates Medical Group

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

Clinician information

CredentialMD
Graduation year2017 (9 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1346827953
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