Karen L. Tan, MD

Medicare activity in 2024

Official CMS public-use data for Karen L. Tan, 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. Professional service for preparation and provision of 1 or more antigens (95165)880 services
2. Professional service for multiple injections of allergen (95117)278 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)216 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)145 services
5. Diagnostic exam of nasal passages using an endoscope (31231)68 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%
• Arthritis44%
• Anxiety34%
• Diabetes28%
• Depression28%

Hospitals where Karen L. Tan works

Medicare's Facility Affiliation Data lists Karen L. Tan 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.

• Nathan Littauer HospitalGloversville, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330276
• St Mary's HealthcareAmsterdam, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330047

Practice locations

Addresses where Karen L. Tan is enrolled with Medicare (CMS data updated October 2, 2026).

• 5010 State Hwy 30, Suite 204Amsterdam, NY 12010 (518) 842‑8185

Specialties

• Otolaryngologyprimary

Find other Otolaryngology doctors in New York →

Other ENT doctors in New York

Clinicians with the same Medicare primary specialty in New York — not a recommendation.

• Athanasios Tournas, MD
• Madeleine R. Schaberg, MD
• Salim A. Matar, MD
• Prayag S. Patel, MD
• Manoj Kantu, MD
• Joseph D. Depietro, MD
• Nicolas Y. Gno, MD
• John J. Faria, MD

All ENT doctors in New York →

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