Karen P. Alexander, MD

Medicare activity in 2024

Official CMS public-use data for Karen P. Alexander, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)317 services
2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)22 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 disease48%
• Arthritis47%
• Atrial fibrillation35%
• Chronic kidney disease25%

Hospitals where Karen P. Alexander works

Medicare's Facility Affiliation Data lists Karen P. Alexander 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.

• Duke University HospitalDurham, NC · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 340030

Practice locations

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

• 40 Duke Medicine CirDurham, NC 27710 (919) 684‑8111
• 5601 Arringdon Park DrMorrisville, NC 27560 (919) 684‑8111

Group practices

Medicare enrollment lists Karen P. Alexander as a member of this group (CMS data updated October 2, 2026).

• Duke Health Integrated Practice, Inc3,185 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary

Find other Cardiovascular Disease (Cardiology) doctors in North Carolina →

Other cardiologists in Durham

Clinicians with the same Medicare primary specialty in Durham, NC — not a recommendation.

• John H. Alexander, MD
• Michelle D. Kelsey, MD
• Timothy P. Donahue, MD
• Eric S. Moore, MD
• James Brennan, MD
• Gerald Bloomfield, MD
• Richa Agarwal, MD
• Christopher B. Granger, MD

All cardiologists in Durham →

Other clinicians in Duke Health Integrated Practice, Inc

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

• Arif H. Kamal, MD
• Gentzon Hall, MD
• Justin A. Crocker, MD
• Nina M. Angeles, MD
• John Johnston, MD
• Madison I. Dunning, OD

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