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Fhir Developer Skill

anthropics/healthcareOfficial

A comprehensive reference for building FHIR R4 REST APIs that gets the details right. The core value is in the specifics: it clearly separates required from optional fields (spoiler: most things are optional), maps validation errors to the correct HTTP status codes (422 for bad enums, 412 for ETag mismatches, not just "400 for everything"), and provides ready-to-use code patterns in Python and TypeScript. Includes value sets for all the common enums, coding system URLs for LOINC/SNOMED/RxNorm, and calls out the gotchas that trip people up like Encounter.class using Coding directly instead of CodeableConcept. Best used when you're tired of cross-referencing the official FHIR spec and just need to know what fields are actually mandatory.

skills.sh installs: 672
GitHub stars: 443
last updated: Aug 21, 2026

Install

$ npx -y skills add anthropics/healthcare --skill fhir-developer-skill --agent claude-code

Installs into .claude/skills of the current project.

Files

FHIR Developer Skill

Quick Reference

HTTP Status Codes

Code	When to Use
`200 OK`	Successful read, update, or search
`201 Created`	Successful create (include `Location` header)
`204 No Content`	Successful delete
`400 Bad Request`	Malformed JSON, wrong resourceType
`401 Unauthorized`	Missing, expired, revoked, or malformed token (RFC 6750)
`403 Forbidden`	Valid token but insufficient scopes
`404 Not Found`	Resource doesn't exist
`412 Precondition Failed`	If-Match ETag mismatch (NOT 400!)
`422 Unprocessable Entity`	Missing required fields, invalid enum values, business rule violations

SKILL.md on GitHub

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Details

Repository: github.com/anthropics/healthcare
Categories: Backend & APIs, Security, Documentation, Debugging, Automation & Workflows
First seen: Jun 3, 2026

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