Timothy Y. Chou, MD

Medicare activity in 2024

Official CMS public-use data for Timothy Y. Chou, 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 problem focused exam of visual system (92012)552 services
2. Established patient complete exam of visual system (92014)412 services
3. Microfluid analysis of tears (83861)218 services
4. Imaging of optic nerve (92133)158 services
5. New patient complete exam of visual system (92004)100 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%
• Arthritis52%
• Diabetes34%
• Ischemic heart disease33%
• Anxiety25%

Hospitals where Timothy Y. Chou works

Medicare's Facility Affiliation Data lists Timothy Y. Chou 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.

• Suny/Stony Brook University HospitalStony Brook, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330393

Practice locations

Addresses where Timothy Y. Chou is enrolled with Medicare (CMS data updated October 2, 2026).

• 101 Nicolls RdStony Brook, NY 11794 (631) 444‑4090

Group practices

Medicare enrollment lists Timothy Y. Chou as a member of this group (CMS data updated October 2, 2026).

• Stony Brook Ophthalmology, University Faculty Practice Corporation14 clinicians in the group

Specialties

• Ophthalmologyprimary

Find other Ophthalmology doctors in New York →

Other ophthalmologists in Stony Brook

Clinicians with the same Medicare primary specialty in Stony Brook, NY — not a recommendation.

• Nga Yan Siu, DO
• Robert A. Honkanen, MD
• Farzan M. Gorgani, DO
• Tehmina Haque, MD
• Daniel G. Cyr, DO
• Armando L. Garcia, MD
• Gideon L. Schneck, MD
• Benedict Urmaza, MD

All ophthalmologists in Stony Brook →

Other clinicians in Stony Brook Ophthalmology, University Faculty Practice Corporation

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

• Nga Yan Siu, DO
• Nancy Kwon, OD
• Patricia J. Pahk, MD
• Robert A. Honkanen, MD
• Daniel G. Cyr, DO
• Rashmi Verma, 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