David Chang is an Ophthalmology physician affiliated with Alto Neuroscience. OpenAlex indexes 203 publications with 7,811 citations (h-index 48); ClinicalTrials.gov lists 6 registered studies matched to this name. By OpenAlex citation count, this profile ranks in the top 10% of Ophthalmology profiles in the findmyKOL directory.
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex, matched via ORCID.
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
762 Altos Oaks Dr
Los Altos, CA 940245434
Telephone
650-948-9123Registry record last updated 5 May 2015.
Clinical trials
- LymphBridge: Surgical Evaluation for Breast Cancer-Associated Lymphedema (BioBridge)
Sponsor: Fibralign Corporation
- Precision-Panc Master Protocol: Personalising Treatment for Pancreatic Cancer
Sponsor: Judith Dixon-Hughes
Registered studies on ClinicalTrials.gov where the overall official or a site investigator name-matches this physician, confirmed against known institution/geography. Latest few shown; the full list is part of the full profile.
Industry payments
21 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- RxSight IncProgram year20251 payment$65,283openpaymentsdata.cms.gov ↗
- Alcon Vision LLCProgram year202514 payments$19,215openpaymentsdata.cms.gov ↗
- Alcon Research LLCProgram year20256 payments$14,626openpaymentsdata.cms.gov ↗
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
53.3%Corticosteroid27.3%Prednisolone Acetate100%Part D≥78 patientsPolymyxin-class Antibacterial11.5%Polymyxin B Sul-Trimethoprim100%Part D≥47 patients+ 2 more classes in this area
Musculoskeletal
41.4%Nonsteroidal Anti-inflammatory Drug36.9%Diclofenac Sodium100%Part D≥109 patientsCyclooxygenase Inhibitor4.5%Ketorolac Tromethamine100%Part D≥16 patientsCardiovascular
5.3%Beta blocker5.3%Timolol Maleate100%Part D≥14 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.
NIH funding
4 NIH research awards on record, funded 1998–2021 per NIH RePORTER. The latest:
- Prospective evaluation of a surgical solution for breast cancer-associated lymphedema
Fibralign Corporation
FY2021$682,266R44CA203608 - Prospective evaluation of a surgical solution for breast cancer-associated lymphedema
Fibralign Corporation
FY2020$32,935R44CA203608 - Prospective evaluation of a surgical solution for breast cancer-associated lymphedema
Fibralign Corporation
FY2019$252,861R44CA203608
Awards in the NIH RePORTER records where a principal investigator name matches this physician at an organization in their practice state. Latest award years shown; each row links to the project record on RePORTER.
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
- Antibiotic prophylaxis of postoperative endophthalmitis after cataract surgery: results of the 2021 ASCRS member survey
Journal of Cataract & Refractive Surgery
2021 - Survey of cataract surgeons' and nurses' attitudes toward operating room waste
Journal of Cataract & Refractive Surgery
2020
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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.”