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ICD-10 Codes MCP server — tools & history

ICD-10 Codes MCP server: observed open status, tool schemas, linked apps and version history.

ICD-10 Codes

Endpoint: https://hcls.mcp.claude.com/icd10_codes/mcp

Observed status: open. Checked: 2026-10-11T06:21:26+00:00.

Linked apps

Observed tools

  • get_by_body_system — Get ICD-10-PCS procedure codes for a specific body system, optionally filtered by section. Body system is identified by the second character of the code for most sections (fourth character for Section F). Example: '0' for Central Nervous System (Section 0), '0' for Neurological System (Section F). Useful for finding all procedures related to an anatomical system.
  • get_by_category — Get diagnosis codes by ICD-10-CM chapter or category. Use chapter (single letter) for broad categories or category (3 characters) for specific disease groups. Useful for exploring codes within a clinical area.
  • get_hierarchy — Get the hierarchy of codes under a category. Returns the category header and up to `limit` child codes (default 500, max 2000) ordered by code; broad prefixes (e.g. a single-letter chapter) may be truncated. Use this to explore related codes within a disease category or code family.
  • lookup_code — Look up a specific ICD-10 code by its code number. Returns full details including descriptions, HIPAA transaction validity status, and the fiscal years the code has been in effect (FY2027 code set; history tracked from FY2020 for diagnosis, FY2021 for procedure). Pass as_of with the encounter's date of service to check the code was in effect on that date — ICD-10 sets change every October 1 and sometimes mid-year. Codes retired from the current set still resolve, marked with the last year or day they were in effect.
  • search_codes — Search ICD-10-CM diagnosis and ICD-10-PCS procedure codes. Unified tool that supports searching by code or description. Use this for all ICD-10 search needs. Serves the FY2027 code set (in effect Oct 1 through Sep 30). Pass as_of with the encounter's date of service to annotate each result with whether it was in effect on that date — codes added after the date of service must not go on the claim.
  • validate_code — Validate an ICD-10 code to check if it exists and is valid for HIPAA-covered transactions. Pass as_of with the encounter's date of service to also check the code was in effect on that date — ICD-10 sets change every October 1 and sometimes mid-year, and a code not in effect on the date of service is not billable (current set: FY2027). Codes retired from the current set are reported as retired, with the period they were in effect.

Data as of 2026-10-11T06:21:26+00:00.

OpenApps records store listings and observed changes. Store ranks are not download counts; launch dates may be derived or use the first observation. Coverage gaps are shown in the interactive catalog.

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