Diana G. Chan, MD

Medicare activity in 2024

Official CMS public-use data for Diana G. 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)202 services
2. Hospital discharge day management, 30 minutes or less (99238)78 services
3. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)46 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)45 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)36 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%
• Diabetes37%
• Ischemic heart disease34%
• Depression33%

Hospitals where Diana G. Chan works

Medicare's Facility Affiliation Data lists Diana G. 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
• Overlook Medical CenterSummit, NJ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 310051

Practice locations

Addresses where Diana G. Chan is enrolled with Medicare (CMS data updated October 2, 2026).

• 100 Madison AveMorristown, NJ 07960 (973) 971‑5596
• 1000 Galloping Hill RdUnion, NJ 07083

Group practices

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

• Practice Associates Medical Group1,408 clinicians in the group

Specialties

• Internal Medicineprimary

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.

• Ned George, MD
• Raunaq Bhatt, MD
• Hristo V. Stoytchev, MD
• Jolanta M. Kibilska-Borowski, MD
• Elsa Thomas, MD
• Olutunde O. Odeyemi, MD
• Radhika S. Remadevi, MD
• Michael E. Germain, DO

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.

• Joseph Forgione, MD
• Michael S. Lux, MD
• Leah A. Scilingo, NP
• James Gardner, MD
• Megan I. Rodrigues, PA
• Evan Lenkowsky, DO

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