hi, I'm Clint. I write down what I learn building software for healthcare.

Plumbing, models, and the people who run them.

Articles on healthcare integration, applied LLMs, and leading engineering teams. Twelve years of it, mostly in Nashville, usually with espresso.

Clint Johnson with family on a golf course tee box in Bloomfield Hills, Michigan, 2024
4 Generations · Bloomfield Hills, MI · 2024

fresh off the desk →

9 min read

CMS-0057-F FHIR Prior Auth API for 2027: Keep the LLM Out of Order-Sign

CMS-0057-F makes FHIR prior auth APIs due in 2027. How CRD rides CDS Hooks, why no LLM belongs in order-sign, and where AI can safely draft DTR answers.

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Latest writing

All 76 articles →
  1. LLMs, agents, evalsFDA's 2026 Clinical Decision Support Guidance Didn't Bless Generative AI
  2. LLMs, agents, evalsYour Support Team Is Claude Code on a Timer
  3. LLMs, agents, evalsWhat an AI Audit Actually Finds
  4. LLMs, agents, evalsInside a Production Voice Agent: How the Stack Actually Ships
  5. LLMs, agents, evalsPrompt Engineering Didn't Die. It Got Unrolled.

Where to start

pick the one that sounds like you, read them in order

You work in healthcare tech

  1. Healthcare Integration For Beginners: HL7v2
  2. Mirth Connect: Part 1 - Getting Started with 🐳 Docker
  3. HIPAA Consent: What Engineers Actually Need to Know

You build with LLMs

  1. Table Stakes for Pragmatic Development Using LLMs
  2. What an AI Audit Actually Finds
  3. Your Support Team Is Claude Code on a Timer

You lead engineers

  1. Staff Engineer Layoff Survival Guide: Lessons from 2008, 2020, 2023 — and Now
  2. The Food Truck Method: Building MVPs That Don't Suck
  3. The Death of Institutional Memory: Why I'm Building Atlas (And Why It Matters)

Series

HL7 & Mirth from zero
  1. 1/3Healthcare Integration For Beginners: HL7v2
  2. 2/3Mirth Connect: Part 1 - Getting Started with 🐳 Docker
  3. 3/3Mirth Connect: Part 2 - Adding 🐰RabbitMQ
Shipping LLMs in production
  1. 1/3Table Stakes for Pragmatic Development Using LLMs
  2. 2/3What an AI Audit Actually Finds
  3. 3/3Your Support Team Is Claude Code on a Timer
React state, then and now
  1. 1/2React State Management & Clean SPA Architecture
  2. 2/2React Tooling 2024: Stop Using the Wrong Shit