Theodoros Karantanos, MD

Medicare activity in 2024

Official CMS public-use data for Theodoros Karantanos, 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 50 minutes (99233)176 services
2. Bone marrow, smear interpretation (85097)44 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)18 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%
• Arthritis48%
• Ischemic heart disease43%
• Chronic kidney disease43%
• Atrial fibrillation29%

Hospitals where Theodoros Karantanos works

Medicare's Facility Affiliation Data lists Theodoros Karantanos 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.

• The Johns Hopkins HospitalBaltimore, MD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 210009

Practice locations

Addresses where Theodoros Karantanos is enrolled with Medicare (CMS data updated October 2, 2026).

• 5755 Cedar LnColumbia, MD 21044
• 5759 Cedar LnColumbia, MD 21044
• 600 N Wolf StBaltimore, MD 21287
• 600 N Wolfe St, Blalock 266Baltimore, MD 21287 (410) 502‑4340
• 6201 Greenleigh AveMiddle River, MD 21220

Group practices

Medicare enrollment lists Theodoros Karantanos as a member of this group (CMS data updated October 2, 2026).

• Johns Hopkins University2,909 clinicians in the group

Specialties

• Medical Oncologyprimary
• Internal Medicinealso

Find other Medical Oncology doctors in Maryland →

Other oncologists in Columbia

Clinicians with the same Medicare primary specialty in Columbia, MD — not a recommendation.

• Mary Y. Armanios, MD
• Dan Soffer, MD
• Burles A. Johnson Iii, MD
• Govind Warrier, MD
• Jun Sun, MD
• Won Jin Ho, MD
• Jorge Florindez, MD
• Carol K. Tweed, MD

All oncologists in Columbia →

Other clinicians in Johns Hopkins University

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

• Richard J. Redett, MD
• Allison Weaver, MD
• William Craig, MD
• Diamond Moore, CNA
• Sandra De Mel, MD
• Gaurav Raman, 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