Pratap Challa is an Ophthalmology physician affiliated with Duke University. OpenAlex indexes 181 publications with 4,090 citations (h-index 39).
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
2351 Erwin Rd
Durham, NC 277054699
Telephone
919-684-8111Registry record last updated 6 Jun 2013.
Industry payments
6 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- Nova Eye, Inc.Program year20251 payment
- ABBVIE INC.Program year20251 payment
- Bausch & Lomb Americas Inc.Program year20241 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
87.1%Prostaglandin Analog30%Latanoprost81%Lumigan9%Travoprost8%Xalatan1%Tafluprost1%Part D<11 patientsCarbonic Anhydrase Inhibitor22.9%Dorzolamide-Timolol73%Dorzolamide Hcl15%Acetazolamide Er4%Acetazolamide4%Brinzolamide3%Simbrinza2%Part D<11 patients+ 6 more classes in this area
Cardiovascular
6.9%Beta blocker6.9%Timolol Maleate100%Part D<11 patientsAnti-infectives
3.4%Macrolide2.9%Erythromycin100%Part D≥54 patientsFluoroquinolone Antibacterial0.5%Moxifloxacin100%Part D<11 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
2 NIH research awards on record, funded 2003–2019 per NIH RePORTER. The latest:
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.
- Netarsudil Improves Trabecular Outflow Facility in Patients with Primary Open Angle Glaucoma or Ocular Hypertension: A Phase 2 Study
American Journal of Ophthalmology
2021 - Role of the autotaxin-lysophosphatidic acid axis in glaucoma, aqueous humor drainage and fibrogenic activity
Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease
2019
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Duke University
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John Perfect, MD
Duke University
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.”