ICD-9-CM (legacy) codes

Legacy ICD-9-CM diagnosis or procedure codes — still used for historical records. Returns the dotted code plus short/long names.

How to use

Set `type` to "diagnosis" (default) or "procedure". Search by term or code.

Parameters

Name	Type		Description
query	string	required	Term or ICD-9 code (dotted or undotted).
type	enum(diagnosis \| procedure)	optional	Which ICD-9-CM set. Default diagnosis.
limit	number	optional	Max results (default 20).

Example input

{
  "query": "brain abscess",
  "type": "diagnosis"
}

Example output

{
  "total": 8,
  "rows": [
    {
      "code": "006.5",
      "codeRaw": "0065",
      "shortName": "Amebic brain abscess",
      "longName": "Amebic brain abscess"
    }
  ]
}

Call it (MCP tools/call)

{
  "method": "tools/call",
  "params": {
    "name": "lookup_icd9",
    "arguments": {
      "query": "brain abscess",
      "type": "diagnosis"
    }
  }
}

Endpoint: POST https://clinical-mcp.mcharge.in/mcp (Streamable HTTP).

Notes

For current coding use lookup_icd10 / lookup_icd11.