I am a healthcare entrepreneur and data scientist based in Concord, North Carolina. I am the CEO and co-founder of Open Wound Research, where I bring modern statistical methodology and real-world evidence to chronic wound care.
Bayesian inference, real-world evidence, and careful thinking applied to wound-care data, post-acute care, and Medicare claims.
What I Do
My day job is wound care: I lead Open Wound Research after fifteen years across marketing, strategy, and operations in wound care and post-acute medicine, most recently as CMO and Executive Director of Strategy at Wound Healing Solutions. Before that I spent a decade in healthcare management across physical medicine and rehabilitation, pain medicine, and consulting. At OWR the work spans statistical methodology for clinical trials and real-world evidence, the data infrastructure that makes Medicare and CMS data usable at scale, quantitative market research, the geography of access to mobile wound care, software we build to support clinicians and researchers, and the writing and speaking that makes the methods legible to clinicians, payors, and policymakers.
Around that I keep a wider research portfolio:
- The nursing home market — what MDS, citation, staffing, and OSCAR/CASPER data actually say about post-acute care, and the analytical mistakes people make reading it.
- The post-acute market more broadly — mobile-delivery economics, provider-shortage geography, and the gap between coverage policy and lived access.
- Bayesian methods for real-world data — how to do honest inference when the data are observational and messy.
- South African history and political economy — quantitative approaches to the questions of land, labour, capital, and inheritance that shape the country I grew up in.
I also chair the Clinical Trial Standards and Reporting workstream at the Wound Care Collaborative Community, sit on the research board of the Association for the Advancement of Wound Care, serve as Treasurer of the Independent Wound Specialist Society, and am a board member of Chronic Wound Care Management and Research.
Selected Work
Recent publications — see ORCID 0009-0008-6100-0828 for the full list.
- Wahab N, Carpenter S, Gooden J, Kapp D, Niezgoda J, Tettelbach W, Toranto J, Cole W, Patel N, Bishop J, Tunyiswa Z, et al. Recommendations to inform National Coverage Determination development for skin substitutes in hard-to-heal wounds. International Journal of Tissue Repair, Jun 2026.
- Sullivan R, Tunyiswa Z, Cole W, Gould L, Low M. A Retrospective Real-World Data Analysis of Pressure Ulcer Healing With Nitric Oxide-Delivering Foam Among Older Adults. International Wound Journal, May 2026.
- Tunyiswa Z, Frade S, Dirks R, Walthall H. Human keratin matrix use and wound healing outcomes in post-acute care of pressure ulcers: Evidence from a Bayesian real-world study. International Journal of Tissue Repair, Mar 2026.
- Tunyiswa Z, Ramey-Ward A. WCCC CONSORT Flow Diagram Generator. Zenodo (software), Feb 2026.
- Tunyiswa Z, Frykberg R, Dirks R. A Bayesian hierarchical meta-analysis of CAMPS versus standard of care for diabetic foot ulcers: systematic review of evidence from Medicare’s 2024 final Local Coverage Determinations. International Journal of Tissue Repair, 2025.
- Serena TE, Andersen C, Bohn G, Cosentino G, Davis M, Desvigne M, …, Tunyiswa Z, et al. Clinical trials for cellular, acellular and matrix-like products (CAMPs): an evidence consensus. International Journal of Tissue Repair, 2025.
- Desvigne M, Tettelbach WH, Davenport T, …, Tunyiswa Z, et al. Cellular, Acellular And Matrix-Like Products (CAMPS) In Pressure Injuries. Journal of Wound Care, Dec 2025.
- Frykberg RG, Tunyiswa Z, Weston WW. Retention processed placental membrane versus standard of care in treating diabetic foot ulcers. International Wound Journal, Oct 2024.
Recent writing
- Quantifying the rural mobile wound care need — Jun 2026. A three-tier framework (FORHP rural, HPSA/MUA/MUP, double-burden intersection) for sizing where mobile delivery is the only viable model.
- PAR for clinical decision-making is different from PAR for statistical inference — May 2026. Why the arm-level mean PAR in DFU trial readouts conflates baseline-size differences with treatment response, and a hurdle-gamma + g-computation fix.
- The Ontology Is the Freeway. The AI Apps Are the Cars. — Apr 2026.
- What the shape of Medicare spending can teach you about wound care costs — Mar 2026.
- What FY2025 CERT Data Reveals About CAMPS Products — Feb 2026.
- Open Wound Research Podcast — long-form conversations with wound clinicians and researchers.
Recent talks
- The CAMPs Pivot: Modernizing Evidence and Smarter Pathways to a Biologics License Application — TRSS Spring 2026 (panel with Thomas Serena, MD and Arati Bhosale, MD), May 2026.
- Market Signals: The Data Landscape of Mobile Wound Care — IWSS webinar, Jun 2026.
- Statistical Thinking for Burn Research — Boswick Burn & Wound Care Symposium (Maui), Jan 2026.
- Quantifying Evidence: The LCD Meta-analysis — TRES 2025 (Ritz-Carlton New Orleans), Oct 2025.
- Pressure Ulcer Evidence Research — Real World Evidence and Dealing with Tunneling and Undermining (Statistically…) — IPAWS & TRS 2025 (Ritz-Carlton New Orleans), Nov 2025.
See Talks and Publications for the full lists.
Interests
- Bayesian inference
- Real-world evidence
- Causal inference
- Quantitative market research
- Healthcare claims & administrative data
- GIS and spatial analysis
- Network theory
- Clinical trial methodology
- South African history & political economy
- Data infrastructure
- Open-source software
Education
2004 University of Pennsylvania
Philadelphia, PA2003 International Christian University
Tokyo, Japan2000 UWC Atlantic College
St Donat’s, Wales, UK1997 Traveling School International
Santa Cruz, CA1996 Cape Town High School
Cape Town, South Africa1991 St. Paul’s Primary School
Cape Town, South Africa