Katherine Stewart, MD

Medicare activity in 2024

Official CMS public-use data for Katherine Stewart, 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 low level od decision making, if using time, 20 minutes or more (99213)69 services
2. Pelvic exam (99459)53 services
3. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)36 services
4. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)28 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)27 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 cholesterol75%
• High blood pressure74%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)53%
• Arthritis51%
• Anxiety34%
• Diabetes31%

Hospitals where Katherine Stewart works

Medicare's Facility Affiliation Data lists Katherine Stewart 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.

• Johns Hopkins Howard County Medical CenterColumbia, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210048
• The Johns Hopkins HospitalBaltimore, MD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 210009
• University of Maryland Medical CenterBaltimore, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210002

Practice locations

Addresses where Katherine Stewart is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.

• 10710 Charter Dr, Suite 420Columbia, MD 21044 (443) 546‑1500
• 10755 Falls RdLutherville, MD 21093
• 5755 Cedar LnColumbia, MD 21044
• 5759 Cedar LnColumbia, MD 21044
• 600 N Wolf StBaltimore, MD 21287

Group practices

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

• Johns Hopkins University2,909 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in Maryland →

Other OB-GYNs in Columbia

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

• Kimberly M. Turner, MD
• Adiam H. Goitom, MD
• Harold Y. Wu, MD
• Orlene Thomas, MD
• Carla J. Weisman, MD
• Aparna Ramaseshan, MD
• Amy H. Gueye, MD
• Melinda E. Afzal, DO

All OB-GYNs in Columbia →

Other clinicians in Johns Hopkins University

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

• April N. Sharp, MD
• Aashini Patel, MD
• Bimal Ashar, MD
• Darcy Wolfman, MD
• James R. Eshleman, MD
• Ann O. Scheimann, 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