Clark Tsai is an Ophthalmology physician affiliated with University of California San Diego. OpenAlex indexes 21 publications with 698 citations (h-index 8).
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
Clinical & industry
trials, payments and federal fundingContact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
2700 Grant St
Ste. 100
Concord, CA 945202266
Telephone
925-689-7744Registry record last updated 17 Aug 2015.
Industry payments
11 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- ABBVIE INC.Program year202511 payments
- Alcon Vision LLCProgram year20251 payment
- Topcon Healthcare, Inc.Program year20251 payment
Payment records matched to this physician's NPI in CMS Open Payments, program years 2021 onward.
Medicare prescribing footprint (2024)
The drugs this prescriber writes for Medicare patients, grouped by drug class and therapeutic area. Every percentage is a share of their total prescribing, so you can see what they prescribe most. These are proportions, not patient counts or dollar amounts. No condition is inferred: the claims record what was prescribed, never why.
Sensory organs
68.4%Prostaglandin Analog35.5%Latanoprost96%Lumigan2%Travoprost1%Zioptan1%Part D<11 patientsalpha-Adrenergic Agonist16.4%Brimonidine Tartrate92%Brimonidine Tartrate-Timolol5%Alphagan P2%Combigan1%Part D<11 patients+ 6 more classes in this area
Cardiovascular
11.2%Beta blocker11.2%Timolol Maleate100%Part D<11 patientsAnti-infectives
6.6%Fluoroquinolone Antibacterial6.3%Moxifloxacin100%Part D≥219 patientsMacrolide0.3%Erythromycin100%Part D≥19 patients
Drug classes come from the WHO ATC and U.S. National Library of Medicine (RxClass) classifications; prescribing counts come from the CMS Medicare Part D Prescribers file. Each drug is counted once, under its primary class. Medicare fee-for-service only, so no Medicare Advantage, commercial, or pediatric prescribing is included. CMS publishes this data about 17 months after the fact.
Similar KOLs
Other experts from the same institution or the same specialty.
Robert Weinreb, MD
University of California San Diego
Dilip Jeste, MD
University of California San Diego
Lawrence Eichenfield, MD
University of California San Diego
Constance Benson, MD
University of California San Diego
Emily Chew, MD
National Eye Institute
Robert Weinreb, MD
University of California San Diego
Harry Quigley, MD
Johns Hopkins University School of Medicine
Joel Schuman, MD
Wills Eye Hospital
A basic profile from our physician directory: identity and practice contact from the federal NPPES registry, research from OpenAlex, trials from ClinicalTrials.gov, payments from CMS Open Payments, shown itemized where we have matched records, as a count where we only have a total. This person hasn't been through our full identity-adjudication pipeline yet, so funding, congress activity and public presence aren't shown. Absence of a section means “not yet looked,” never “none found.”