Mark Greiner is an Ophthalmology physician affiliated with University of Iowa. OpenAlex indexes 101 publications with 2,071 citations (h-index 25).
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
200 Hawkins Dr
Iowa City, IA 522421009
Telephone
319-356-2861Registry record last updated 16 Aug 2012.
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
55.8%Corticosteroid48.4%Prednisolone Acetate55%Fluorometholone45%Part D≥173 patientsProstaglandin Analog2.6%Latanoprost100%Part D<11 patients+ 3 more classes in this area
Anti-infectives
27.8%Herpesvirus Nucleoside Analog DNA Polymerase Inhibitor10.7%Valacyclovir100%Part D≥54 patientsFluoroquinolone Antibacterial8.6%Moxifloxacin100%Part D≥54 patients+ 4 more classes in this area
Genitourinary & hormones
4.6%Progestin4.6%Medroxyprogesterone Acetate100%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 2022–2026 per NIH RePORTER. The latest:
- Modulating Ferroptosis in Fuchs Endothelial Corneal Dystrophy
University of Iowa
FY2026$571,357R01EY037135 - Modulating Ferroptosis in Fuchs Endothelial Corneal Dystrophy
University of Iowa
FY2025$588,731R01EY037135 - Optimizing Rho-associated kinase inhibitors for use in treating Fuchs endothelial corneal dystrophy
University of Iowa
FY2023$193,125R21EY034198
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.
- Squishy matters – Corneal mechanobiology in health and disease
Progress in Retinal and Eye Research
2024
Similar KOLs
Other experts from the same institution or the same specialty.
Lawrence Hunsicker, MD
University of Iowa
Brian Olshansky, MD
University of Iowa
Robert Weiss, MD
University of Iowa
Elliott Sohn, MD
University of Iowa
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.”