Medical Codes MCP Server

@cyanheads/medical-codes-mcp-server Decode, search, validate, and crosswalk US medical codes - ICD-10-CM, ICD-10-PCS, HCPCS Level II, RxNorm - over a bundled offline index via MCP. STDIO or Streamable HTTP. Its 6 documented tools cover medcode, code, codes.

People who work with medcode, code and codes and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-08-25 · ★ 2 · #37 OF 71 MAINTAINED SCIENCE & HEALTH · VERIFIED 2026-09-18

Apache-2.0 · TypeScript servers · how we verify → /methodology

01 · Install Medical Codes MCP Server

before you install - you'll need

Set MCP_TRANSPORT_TYPE, MCP_LOG_LEVEL before connecting.

Claude Code

claude mcp add cyanheads-medical-codes-mcp-server --transport http https://medical-codes.caseyjhand.com/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "cyanheads-medical-codes-mcp-server": {
      "url": "https://medical-codes.caseyjhand.com/mcp"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://medical-codes.caseyjhand.com/mcp

transport: streamable-http

endpoint alive - responded to MCP initialize · probed 2026-09-17

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions · remote - your agent's requests go to medical-codes.caseyjhand.com

endpoint auth accepted our unauthenticated MCP initialize - no credentials needed to connect

license Apache-2.0 - declared in the repository

npm package @cyanheads/medical-codes-mcp-server - published under the repo owner's npm scope (@cyanheads)

registry namespace io.github.cyanheads is GitHub-verified and matches the repo owner

03 · What Medical Codes MCP Server can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can validate a code's existence, currency, and billability, with a whyNot for non-billable/terminated cases, and list bundled systems with release identifiers, effective dates, and code counts (provenance).

The 6 tools it gives your agent

Extracted from the project's README - what medical-codes-mcp-server lets an agent do.

medcode_get_code
- Decode 1–50 codes to their official descriptions. Auto-detects the system per code; partial-success found / notFound.
medcode_search_codes
- Full-text search over official descriptions - go from a clinical description to the code.
medcode_check_code
- Validate a code's existence, currency, and billability, with a whyNot for non-billable/terminated cases.
medcode_map_codes
- Crosswalk a code within its hierarchy (parents/children) or a drug across RxNorm (name ↔ RXCUI, NDC ↔ RXCUI, RXCUI → ingredients/brands).
medcode_browse_hierarchy
- Walk a system's hierarchy for discovery without a search term.
medcode_list_systems
- List bundled systems with release identifiers, effective dates, and code counts (provenance).

Latest releases

v0.2.8 · 2026-08-25

mcp-ts-core ^0.12.3, strict tool inputs · Tool inputs are strict: an argument key none of the six medcode_ tools declares is rejected by name instead of silently dropped, and each advertised inputSchema carries…

v0.2.7 · 2026-08-09

cross-system disclosure on collided ICD-10-CM/PCS codes · Adds alsoInSystems to medcode_get_code, medcode_check_code, and · medcode_map_codes (hierarchy directions) - names the other bundled system · when a resolved…

v0.2.6 · 2026-08-09

RxNorm concept types, unmapped-source and header-row fixes · medcode_map_codes tags rxcui_to_ingredients/rxcui_to_brands hits with conceptType (IN/PIN/MIN/BN), separating a combination product's substances from its…

04 · Who maintains Medical Codes MCP Server

medical-codes-mcp-server is maintained by cyanheads. We track 125 MCP servers from cyanheads - 119 actively maintained, 1,816 combined GitHub stars, oldest repo from Dec 2024. Full record: all servers from cyanheads.

  1. obsidian-mcp-server Read, write, search, and surgically edit Obsidian notes, tags, and frontmatter via MCP. ★ 681
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  3. pubmed-mcp-server Search PubMed/Europe PMC, fetch articles and full text (PMC/EPMC/Unpaywall), citations, MeSH terms. ★ 148
  4. git-mcp-server Comprehensive Git MCP server enabling native git tools including clone, commit, worktree, & more. ★ 240
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  6. ntfy-mcp-server Send, manage, and replay ntfy push notifications via MCP. ★ 22

05 · Facts

repository
github.com/cyanheads/medical-codes-mcp-server
category
science & health - ranked #37 of 71 actively-maintained science & health servers as of 2026-09-18.
release cadence
10+ releases in the last 90 days (latest 2026-08-25)
registry
io.github.cyanheads/medical-codes-mcp-server (active, first published 2026-06-13 · 15 versions)
packages
npm:@cyanheads/medical-codes-mcp-server · npm:@cyanheads/medical-codes-mcp-server

06 · Medical Codes MCP Server FAQ

Is Medical Codes MCP Server still maintained?

Yes - as of 2026-09-18, its last commit was 2026-08-25 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

What can Medical Codes MCP Server do?

With this server connected, an agent can validate a code's existence, currency, and billability, with a whyNot for non-billable/terminated cases, and list bundled systems with release identifiers, effective dates, and code counts (provenance).

How do I install Medical Codes MCP Server?

Run `npx -y @cyanheads/medical-codes-mcp-server`. The README documents 2 environment variables (MCP_TRANSPORT_TYPE, MCP_LOG_LEVEL) to set first. Set MCP_TRANSPORT_TYPE, MCP_LOG_LEVEL before connecting. You can also paste the ready-made client config above.

Does Medical Codes MCP Server require authentication?

No - the endpoint accepted our unauthenticated MCP initialize when probed on 2026-09-17; you can connect without credentials.

07 · Alternatives to Medical Codes MCP Server

Alternatives to Medical Codes MCP Server

Maintained science & health servers if Medical Codes MCP Server isn't the fit.

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  4. Pubmed MCP Server Search PubMed/Europe PMC, fetch articles and full text (PMC/EPMC/Unpaywall), citations, MeSH terms. ★ 148 · 2026-09-13
  5. FHIR MCP Server MCP server providing seamless access to FHIR APIs for AI tools and healthcare applications ★ 136 · 2026-09-04
  6. Clinicaltrialsgov MCP Server Search ClinicalTrials.gov - find studies, retrieve results, match patients to eligible trials. ★ 94 · 2026-09-13

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