Joseph Tjan, MD

Medicare activity in 2024

Official CMS public-use data for Joseph Tjan, 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. Anesthesia for lens surgery (00142)110 services
2. Anesthesia for other procedure on large bowel using an endoscope (00811)42 services
3. Anesthesia for procedure on small and large bowel using an endoscope (00813)24 services
4. Anesthesia for other procedure on eye (00140)21 services
5. Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)20 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 pressure65%
• Arthritis50%
• Ischemic heart disease25%
• Anxiety25%
• Osteoporosis25%

Hospitals where Joseph Tjan works

Medicare's Facility Affiliation Data lists Joseph Tjan 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.

• New York-Presbyterian HospitalNew York, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330101

Practice locations

Addresses where Joseph Tjan is enrolled with Medicare (CMS data updated October 2, 2026).

• 525 E 68th StNew York, NY 10065 (212) 746‑2846

Group practices

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

• Weill Medical College of Cornell2,051 clinicians in the group

Specialties

• Anesthesiologyprimary

Find other Anesthesiology doctors in New York →

Other anesthesiologists in New York

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

• Hugh C. Hemmings, MD
• Rajvir K. Chahal, MD
• Ajay Lall, MD
• Hakyung K. Shin, MD
• Olga Rozental, MD
• Abimbola Adegbola, MD
• Karen M. Cox, MD
• Patricia Fogarty Mack, MD

All anesthesiologists in New York →

Other clinicians in Weill Medical College of Cornell

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

• Neil M. Khilnani, MD
• Tiffany K. Min, NP
• Elisabeth G. Baron, MD
• Hugh C. Hemmings, MD
• Michelle N. Chi, MD
• Matthew E. Fink, 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