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Field notes from healthcare engineering — written by people doing the work.

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  • State lines are software boundaries
  • The three things state licensing actually controls
  • The routing problem
  • License verification — manual or automated
01 / 15SK · Kholin
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Isometric US map laptop with medical devices — multi-state telehealth
EngineeringSep 12, 2025

Multi-state telehealth: the licensing routing problem (and what to build)

Every telehealth platform that grows past one state hits the same wall — every state has different licensing rules, scope-of-practice limits, and e-prescribing requirements. Here's the routing architecture that survives all 50.

Serhii Kholin

Serhii Kholin · 10 min

Patient on couch with telehealth screen — RPM at home
EngineeringApr 17, 2024

Remote patient monitoring without burning out caregivers

Alert fatigue kills RPM programs faster than any technical issue. Here's the framework we use to design alert systems that surface the right thing at the right time — and the metrics that tell you it's working.

Denis Sheremetov

Denis Sheremetov · 11 min

Doctor holding glass cube with medical cross — CDS Hooks
EngineeringNov 8, 2023

CDS Hooks: shipping clinical decision support clinicians actually use

CDS Hooks is the standard for delivering decision support inside the EHR — but standards don't drive adoption. Here's what separates CDS that gets accepted from CDS that gets disabled in week two.

Serhii Kholin

Serhii Kholin · 9 min

Doctor with red pie chart — insurance overspend
StrategyAug 5, 2024

Why Mid-Size Healthcare Insurance Companies Overpay for Salesforce by 2–3×

Every healthcare insurance CFO has had this conversation: the Salesforce invoice lands, it's up 8% over last year, and the renewal includes an Enterprise Tier upgrade you weren't warned about. Here's how the overpay actually happens — and how to spot it in your own bill.

Denis Sheremetov

Denis Sheremetov · 9 min

Doctor holding upward chart icon — 30% CRM cost cut
StrategyFeb 11, 2026

How We Cut CRM Costs ~30% in Year Two — A Healthcare Insurer Case Study

The proof point behind the pillar TCO comparison. A real engagement: a California health-insurance company, custom CRM layer delivered in 6 months, Year 2 came in roughly 30% cheaper. Forward this to your CFO.

Denis Sheremetov

Denis Sheremetov · 12 min

Magnifying glass over HIPAA document with stethoscope
ComplianceJun 19, 2021

What a HIPAA audit actually looks like — from the inside

Most teams build to a checklist and hope. We've sat across from the auditor — here's what they actually ask, and what surprises engineering teams.

Denis Sheremetov

Denis Sheremetov · 8 min

Hourglass and clock over chart — a 10-minute FHIR primer
InteroperabilityJul 23, 2019

FHIR for non-engineers: a 10-minute primer for product managers

If you're the PM on a healthcare project, you don't need to write FHIR code — but you do need to understand what your engineers mean when they say it.

Serhii Kholin

Serhii Kholin · 10 min

Engineer beside red medical cube — rescue vs rebuild call
StrategyOct 4, 2022

When to rescue and when to rebuild: a decision framework

Half of our healthcare engagements start as rescues. Here's how we decide — in the first 48 hours — whether to fix what's there or burn it down.

Denis Sheremetov

Denis Sheremetov · 12 min

Clinician holding tablet with lung scan and analytics overlay
AIDec 15, 2025

Building a clinical validation harness for ML in healthcare

Models that work on benchmarks don't always work in your hospital. Here's the validation infrastructure we wish every team had on day one.

Serhii Kholin

Serhii Kholin · 11 min

Laptop dashboard with stethoscope — IEC 62304 in practice
MedTechMar 26, 2020

IEC 62304 in practice: what it actually requires (and what people get wrong)

62304 doesn't tell you to write tests. It tells you to write tests that trace to requirements that trace to user needs. Here's what that looks like in a real codebase.

Serhii Kholin

Serhii Kholin · 14 min

Apple with medical cross on tablet — Epic App Orchard survival
InteroperabilityFeb 14, 2023

Surviving an Epic App Orchard review: a survival guide

The Epic review process is famously rigorous. We've been through it nine times. Here's the prep work that shortens the cycle from 4 months to 6 weeks.

Serhii Kholin

Serhii Kholin · 9 min

Nurse on phone in hospital corridor — ambient voice capture
EngineeringNov 30, 2024

Ambient voice documentation: pipelines that don't leak PHI

Voice-to-note is one of the highest-leverage AI uses in clinical practice. It's also one of the easiest places to ship a HIPAA violation. Here's how to architect it.

Serhii Kholin

Serhii Kholin · 13 min

Clinician tapping tablet dashboard — portal adoption metrics
EngineeringSep 8, 2021

Why nobody uses your patient portal (and what to measure to fix it)

Portal adoption baselines in healthcare run 30-40%. The teams hitting 60-80% measure four things their peers don't. Here they are.

Denis Sheremetov

Denis Sheremetov · 7 min

Laptop with security padlock UI — FDA premarket cybersecurity
MedTechAug 21, 2023

FDA's 2023 cybersecurity premarket guidance: what changed for SaMD teams

The new guidance pushed cybersecurity from optional to mandatory in the submission package. Here's what your DHF needs to include now.

Serhii Kholin

Serhii Kholin · 10 min

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