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ACCESS Is the Outcome-Aligned Payment Model — And the Bottleneck Is Your Data, Not the API

CMS's new ACCESS Model pays for outcomes, not activities. The orgs that win will be the ones whose clinical data is structured, coded, and validatable enough to prove the outcome. That's a terminology and conformance problem, and a problem we know how to solve.

July 21, 2026By Brian Kaney
healthcarecmsaccessfhirterminologyinteroperabilityvalue-based-care

RH Validator: Inside a Fast FHIR Validator

A DevDays follow-up on rh-validator, the Rust-based FHIR validator in the rh toolkit, and how its internals keep validation fast, cached, and conformance-aware.

July 2, 2026By Brian Kaney
fhirrustvalidationopen-sourcedeveloper-tools

FHIR DevDays 2026: Patient Control, Regular Tooling, and Conversational Interop

Notes from FHIR DevDays 2026 on patient-directed exchange, SMART Health Links, TEFCA, the rh Rust FHIR toolkit, and conversational interoperability for workflows that do not fit pre-negotiated APIs.

June 22, 2026By Brian Kaney
fhirconferenceinteroperabilityaitefcasmart-health-links

Introducing our Agentic Framework for Computable Clinical Knowledge

Our open-source framework orchestrates AI reasoning over raw clinical source material and produces deterministic, computable rules — structured artifacts you can embed directly into EHRs, quality programs, and clinical decision support systems.

June 5, 2026By Brian Kaney and Taylor Le
announcementopen-sourceskillsfhirinformaticscql

ReasonHub Skills: Resolution, Not Retrieval

We just shipped three terminology skills built around a different model: every code the agent returns is looked up against a live terminology server — SNOMED CT, LOINC, ICD-10-CM, RxNorm. Not retrieved from training weights. Not guessed. Resolved.

June 1, 2026By Brian Kaney
announcementreasonhubterminologysnomedloincicd-10rxnormskillsopen-source

Prior Authorization in Medical Oncology: Joining the CodeX Effort to Get Patients to Treatment Faster

CodeX's Prior Authorization in Medical Oncology use case is one of the most important healthcare interoperability efforts happening right now. We're excited to share that Vermonster is part of the working group — and that we're contributing to the spec and an initial reference implementation.

May 29, 2026By Brian Kaney
healthcareprior-authoncologycqlinteroperabilityfhircodex

HTML > Markdown? The Case for Enriched Structured Content

Anthropic has a recent post on the unreasonable effectiveness of HTML as an output format. It's also selling Claude Code — but the underlying point about richer structured content is worth thinking about. Here's the version of that argument as it lands for us, and the convention we've landed on.

May 20, 2026By Brian Kaney
engineeringcontentwebstandardsagents

PR Bottlenecks: What We Are Doing About Them

A small team. 15+ PRs a day. Most of them agent-generated. Code was landing faster than people could review. Here's the experiment we built to fix it — and the open-source skill we're releasing to make it work.

May 4, 2026By Brian Kaney
engineeringdevopsprocessagentsopen-source

Healthcare Domain-Aware AI Workflows

AI coding assistants are great at generic software — and quietly wrong about healthcare. We just published the initial set of Reason healthcare tech skills, a domain-aware workflow stack for the people actually building this stuff. Try it and tell us what's missing.

March 28, 2026By Brian Kaney
aihealthcareworkflowsskillsopen-source

Introducing LessPrompt: Because Running Out of Tokens Shouldn't Feel Like Running Out of Gas

LessPrompt is a prompt pre-processor that rewrites prompts to be clearer, smaller, more structured, and more deterministic — without changing their intent.

December 10, 2025By Brian Kaney
aiexperiment

Bridging FHIR and Specialty Societies: Insights from CMSS 2025

At CMSS 2025, Vermonster connected with leaders from medical specialty societies to explore how FHIR Clinical Reasoning can translate guidance into practice, strengthen learning health systems, and link evidence to outcomes.

December 1, 2025By Co-authored by Taylor Le and Arjun Sanyal
medical-societyconference

Introducing ReasonHub: A Platform for Computable Healthcare Knowledge

Turn disconnected information into computable, standards-aligned knowledge. ReasonHub brings CRMI-native authoring, terminology services, MCP-enabled APIs, and secure syndication together in one place.

November 17, 2025By Brian Kaney
announcement

Build Products, Not Plumbing: ReasonHub for Vendors

ReasonHub provides the FHIR-native infrastructure for your clients asking for next-generation use cases like knowledge-based quality measurement, prior authorization, and care management. Focus on differentiation, not plumbing.

November 17, 2025By Arjun Sanyal
use-casevendorsecondary

The Tipping Point: FHIR Reasoning for Payers

Payers have heard about the digital transition for years, but standards, infrastructure, and content have been immature. But there's been a shift. FHIR and practical FHIR knowledge systems are here, and ReasonHub is the missing piece of the puzzle

November 16, 2025By Arjun Sanyal
use-casepayerpinned

The Consultant's Toolkit: Building the Future of Computable Knowledge with FHIR & ReasonHub

FHIR has made clinical and policy knowledge something you can build, validate, and publish like software — versioned, testable, and ready to plug into real workflows. For healthcare consultants and clinical informaticists, that shift turns expertise into durable, interoperable assets.

November 7, 2025By Taylor Le
use-caseconsultantsecondary

The Future Medical Society: From Publisher to Intelligence Provider

Leading medical societies aren't just publishing anymore, they're building learning health systems. With FHIR and ReasonHub the continuous improvement vision of 21st-century medicine is here.

November 7, 2025By Arjun Sanyal
use-casemedical-society

FHIR for Providers: From Data Exchange to Clinical Intelligence with ReasonHub

Leading provider organizations aren't just exchanging data, they're building intelligent clinical systems. With FHIR and ReasonHub, executable quality measurement, evidence based decision support, and clinically aware AI become realities, not future promises.

November 7, 2025By ReasonHub Team
use-casepinnedprovider