Thaddeaus S. Foster, MD

Practice locations

Addresses where Thaddeaus S. Foster is enrolled with Medicare (CMS data updated October 2, 2026).

• 1221 Mercantile LnLargo, MD 20774 (301) 618‑5700
• 201 N Washington StFalls Church, VA 22046 (703) 237‑4000

Group practices

Medicare enrollment lists Thaddeaus S. Foster as a member of this group (CMS data updated October 2, 2026).

• Kaiser Foundation Health Plan of the Mid Atlantic States, Inc1,899 clinicians in the group

Specialties

• Psychiatryprimary
• Neurologyalso

Find other Psychiatry doctors in Maryland →

Other psychiatrists in Largo

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

• Gebrehana W. Zebro, MD
• Bianca Patel, MD
• Earl John D. Mauricio, MD
• Elizabeth Holcomb, MD
• Zahra Rezvani, MD
• Sushila Chelliah, MD
• Christopher Kowalsky, MD
• Terry D. Neville, MD

All psychiatrists in Largo →

Other clinicians in Kaiser Foundation Health Plan of the Mid Atlantic States, Inc

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

• Daniel J. Patenaude, MD
• Lisa Crisalli, MD
• Chuanbo Zhang, MD
• Pim Suwannarat, MD
• Mary Ann Sprouse, CSW
• Leena Kosandal, 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. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
3. Medicare Care Compare — official Medicare tool to look up clinicians