Mark Johnson is an Ophthalmology physician. ClinicalTrials.gov lists 7 registered studies matched to this name.
Overview
Scholarship
indexed output and impact (OpenAlex)Research metrics aren't shown for this record. Either we found no confident publication match for this name, or more than one physician shares the matched author record. We'd rather show nothing than someone else's numbers. Why? →
Clinical & industry
trials, payments and federal fundingContact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
811 Ridgewood Avenue
Venice, FL 34285
Telephone
941-792-2020Provider last certified this registry record 4 Oct 2024.
Clinical trials
- Electroacupuncture as a Treatment for Refractory Overactive Bladder
Sponsor: Chelsea and Westminster NHS Foundation Trust
- Preemie Milk Analyser Validation Study
Sponsor: University Hospital Southampton NHS Foundation Trust
- Speech Accessibility Project
Sponsor: University of Illinois at Urbana-Champaign
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
7 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- Harrow Eye, LLCProgram year20251 payment
- Alcon Vision LLCProgram year20242 payments
- Astellas Pharma US IncProgram 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
49.4%Prostaglandin Analog19.7%Latanoprost100%Part D≥109 patientsAminoglycoside Antibacterial9.3%Neomycin-Polymyxin-Dexameth100%Part D≥132 patients+ 5 more classes in this area
Anti-infectives
29%Macrolide27.7%Erythromycin100%Part D≥342 patientsNitroimidazole Antimicrobial1.3%Metronidazole100%Part D≥18 patientsCardiovascular
7.3%Beta blocker7.3%Timolol Maleate100%Part D≥50 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.
Ali Bijani
Babol University of Medical Sciences
Hamid Asayesh
Ayatollah Boroujerdi University
John J. Huang
Isfahan University of Medical Sciences
Fotis Topouzis
National University of Singapore
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.”