Tam N. Nguyen, MD

Medicare activity in 2024

Official CMS public-use data for Tam N. Nguyen, 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)1,167 services
2. Removal of impacted ear wax (69210)795 services
3. Test for allergy using allergenic extract (95004)613 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)394 services
5. Diagnostic exam of nasal passages using an endoscope (31231)391 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%
• Arthritis51%
• Diabetes31%
• Ischemic heart disease31%
• Anxiety24%

Hospitals where Tam N. Nguyen works

Medicare's Facility Affiliation Data lists Tam N. Nguyen 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.

• Greater Baltimore Medical CenterBaltimore, MD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 210044

Practice locations

Addresses where Tam N. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).

• 23 Crossroads Dr, Suite 400Owings Mills, MD 21117 (410) 356‑2626
• 410 Malcolm Dr, Suite EWestminster, MD 21157 (410) 356‑2626
• 6535 N Charles StBaltimore, MD 21204

Group practices

Medicare enrollment lists Tam N. Nguyen as a member of these groups (CMS data updated October 2, 2026).

• Greater Baltimore Medical Center354 clinicians in the group
• Annapolis Ent Surgical Center LLC41 clinicians in the group

Specialties

• Otolaryngologyprimary

Find other Otolaryngology doctors in Maryland →

Other ENT doctors in Owings Mills

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

• Daniel V. Santos, MD
• Scott D. London, MD
• Douglas C. McCorkle, MD
• Kevin M. Connolly, MD
• Praveen Duggal, MD

All ENT doctors in Owings Mills →

Other clinicians in Greater Baltimore Medical Center

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

• William W. Tsao, MD
• Allison S. Ashcraft
• Kayla M. Amrhein, PA
• Arthur W. Nauman, MD
• James M. Corkum, MD
• Donald F. Slack Iii, 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