Mei-Yung Chan, MD

Medicare activity in 2024

Official CMS public-use data for Mei-Yung Chan, 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.

Most frequent services

1. Emergency department visit with high level of medical decision making (99285)303 services
2. Emergency department visit with moderate level of medical decision making (99284)84 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)83 services
4. Critical care, first 30-74 minutes (99291)42 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%
• Arthritis57%
• Ischemic heart disease52%
• Chronic kidney disease41%
• Diabetes40%

Hospitals where Mei-Yung Chan works

Medicare's Facility Affiliation Data lists Mei-Yung Chan 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 Mei-Yung Chan is enrolled with Medicare (CMS data updated October 2, 2026).

• 100 Madison AveMorristown, NJ 07960 (954) 939‑5000

Group practices

Medicare enrollment lists Mei-Yung Chan as a member of this group (CMS data updated October 2, 2026).

• Morristown Emergency Medical Associates LLC81 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in New Jersey →

Other emergency medicine doctors in Morristown

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

• Taylor Isenberg, DO
• Nicholas E. Sherman, MD
• Jayram Pai, MD
• Ashley Flannery, DO
• Marilyn Althoff, MD
• Brian W. Walsh, MD
• Shivani Adhyaru, DO
• Daniel L. Fox, DO

All emergency medicine doctors in Morristown →

Other clinicians in Morristown Emergency Medical Associates LLC

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

• Mircea Muresanu, MD
• Meagan A. Trethaway, PA
• Nicholas E. Sherman, MD
• Jayram Pai, MD
• Frederick W. Fiesseler, DO
• Christopher S. Amato, MD

Clinician information

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