Marilyn A. Baird Howell, MD

Medicare activity in 2024

Official CMS public-use data for Marilyn A. Baird Howell, 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. Pathology examination of tissue using a microscope, intermediate complexity (88305)890 services
2. Special stained specimen slides to examine tissue, each additional procedure (88341)357 services
3. Preparation of tissue for examination by removing any calcium present (88311)241 services
4. Special stained specimen slides to examine tissue, initial procedure (88342)125 services
5. Pathology examination of tissue using a microscope, moderately high complexity (88307)114 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%
• Arthritis65%
• Ischemic heart disease41%
• Diabetes39%
• Depression33%

Hospitals where Marilyn A. Baird Howell works

Medicare's Facility Affiliation Data lists Marilyn A. Baird Howell 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.

• MedStar Franklin Square Medical CenterRosedale, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210015
• MedStar Georgetown University HospitalWashington, DC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 090004
• MedStar Good Samaritan HospitalBaltimore, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210056
• MedStar Harbor HospitalBaltimore, MD · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 210034
• MedStar Union Memorial HospitalBaltimore, MD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 210024

Practice locations

Addresses where Marilyn A. Baird Howell is enrolled with Medicare (CMS data updated October 2, 2026).

• 110 Irving St NWWashington, DC 20010 (202) 877‑7000
• 9000 Franklin Square DrBaltimore, MD 21237 (443) 777‑7000

Group practices

Medicare enrollment lists Marilyn A. Baird Howell as a member of this group (CMS data updated October 2, 2026).

• MedStar Medical Group II LLC3,767 clinicians in the group

Specialties

• Pathologyprimary

Find other Pathology doctors in District of Columbia →

Other pathologists in Washington

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

• Maryam Sadough Shahmirzadi, MD
• Margaret M. Shaffer, MD
• Alvaro Frometa, MD
• Andrea Richardson, MD
• Jeffrey S. Iding, MD
• Emily Sloan, MD
• Alexander Baras, MD
• Bhaskar Kallakury, MD

All pathologists in Washington →

Other clinicians in MedStar Medical Group II LLC

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

• Weining D. Xu, MD
• Aimee Caissy, PA
• Erin Hansen, MD
• Jennifer N. Thompson, MD
• Sana Ahmed, PA
• Khawaja O. Husain, 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