Karen R. Stephenson, MD

Medicare activity in 2024

Official CMS public-use data for Karen R. Stephenson, 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)49 services
2. Emergency department visit with moderate level of medical decision making (99284)44 services
3. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)30 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 disease64%
• Arthritis58%
• Diabetes57%
• Chronic kidney disease49%

Hospitals where Karen R. Stephenson works

Medicare's Facility Affiliation Data lists Karen R. Stephenson 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.

• St Mary's General HospitalPassaic, NJ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 310006

Practice locations

Addresses where Karen R. Stephenson is enrolled with Medicare (CMS data updated October 2, 2026).

• 1 Diamond Hill RdBerkeley Heights, NJ 07922 (908) 273‑4300
• 350 BoulevardPassaic, NJ 07055 (973) 365‑4300

Group practices

Medicare enrollment lists Karen R. Stephenson as a member of these groups (CMS data updated October 2, 2026).

• Summit Medical Group PA1,212 clinicians in the group
• Emergency Associates of St Marys LLC16 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in New Jersey →

Other internal medicine doctors in Berkeley Heights

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

• Maria A. Costea Misthos, MD
• Susan Simon, MD
• Valerie Skrelja, MD
• Robert P. Wooton Jr., MD
• Kelly Billig, MD
• Deepali Shah, DO
• Jack V. Cappitelli, MD
• Michael Alvarez, MD

All internal medicine doctors in Berkeley Heights →

Other clinicians in Summit Medical Group PA

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

• Paul C. Thur, MD
• Tony Distefano, DPM
• Maryna Kuznetsov, MD
• Anita Sulibhavi, MD
• Sharon Li, MD
• Kevin Hawk

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