Arm the professional with precision.
Neurona 28 exists to give the individual coding professional — the coder, the auditor, the CDI specialist, the physician — a tool that matches the complexity of V28 with the precision that federal audits demand. Not a shortcut. Not automation. A reliable instrument at the point of documentation.
A regulatory moment that demands a new tool.
CMS-HCC V28 is the most significant overhaul of Medicare Advantage payment methodology in over a decade. It eliminates approximately 2,000 codes, reclassifies conditions, and arrives alongside a 50x expansion in federal audit capacity. The professionals navigating this transition have no dedicated tool built for V28. We are building it.
The hardest market first.
Puerto Rico has the highest Medicare Advantage penetration in the United States — over 90% of eligible seniors. It faces a disproportionate V28 impact (estimated −9.1% risk score reduction vs. −3.4% nationally) and operates in a bilingual clinical environment that no existing tool supports. This is not a test market. It is the optimal beachhead — where every differentiator converges and the need is most acute.
Domain expertise meets technical execution.
Cristian J. Castro-Toledo
Co-Founder & CEO
Leads product vision, engineering execution, and go-to-market at Neurona 28. His background combines clinical training with operational experience inside Puerto Rico’s Medicare Advantage environment, allowing him to translate high-stakes documentation workflows into defensible software systems.
Evelia Nater Nieves
Co Founder & Chief Compliance Architect
Leads compliance architecture and audit-defensibility strategy at Neurona 28. Her background combines deep risk-adjustment and coding expertise with payer-side operational experience in Puerto Rico’s Medicare Advantage environment, allowing her to translate documentation and compliance standards into the evidence-gated logic behind the platform.
What guides us.
Calm Precision
We build for accuracy under pressure. No hype, no shortcuts, no hand-waving. The output is defensible or it is not generated.
Defensibility
Every design decision asks: would this survive a federal audit? If the answer is not clearly yes, we do not ship it.
Integrity
We are honest about what we have built, what we are building, and what we have not built yet. Pre-revenue means pre-revenue. MVP means MVP.
Join the first cohort.
We are onboarding a select group of risk adjustment professionals in Puerto Rico. Request early access to be considered.
- Evidence-gated — no guessed codes
- V28-native from day one
- Built for Puerto Rico's clinical workflow