Louis K. Zweig, MD

Medicare activity in 2024

Official CMS public-use data for Louis K. Zweig, 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. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)269 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)253 services
3. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)123 services
4. Ultrasound study of arm and leg arteries (93922)116 services
5. Annual depression screening, 5 to 15 minutes (G0444)91 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 pressure70%
• High cholesterol49%
• Arthritis32%
• Anxiety18%
• Chronic kidney disease18%
• Osteoporosis16%

Hospitals where Louis K. Zweig works

Medicare's Facility Affiliation Data lists Louis K. Zweig 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.

• Inova Alexandria HospitalAlexandria, VA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 490040
• Inova Mount Vernon HospitalAlexandria, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490122
• Virginia Hospital CenterArlington, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490050

Practice locations

Addresses where Louis K. Zweig is enrolled with Medicare (CMS data updated October 2, 2026).

• 2311 M St NW, Suite 301Washington, DC 20037 (202) 861‑0111
• 2445 Army Navy Dr, Suite 400Arlington, VA 22206 (703) 379‑8879

Group practices

Medicare enrollment lists Louis K. Zweig as a member of this group (CMS data updated October 2, 2026).

• Northern Virginia Family Practice Associates11 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in District of Columbia →

Other internal medicine doctors in Washington

Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.

• Robert C. Clark, MD
• Agegndia Fuoching, MD
• Alicia R. Buchwalter, MD
• Sos A. Mboijana, MD
• Zone-En Lee, MD
• Corica Rodgers, MD
• Christopher Duke, MD
• Christine Gordon, MD

All internal medicine doctors in Washington →

Other clinicians in Northern Virginia Family Practice Associates

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

• Jessica S. Ware, PA
• Cecily D. Havert, MD
• Natasha W. Lewry Beauvais, MD
• Maria Castillo-Catoni, MD
• Elizabeth A. Cilenti, MD
• Judit Gordon-Cappitelli, 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