# ICD-10-CM Code Lookup

> ICD-10-CM Code Lookup is a paid API for AI agents from medical-codes.x402tookit.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-29).

Returns the official description, chapter, and validity (billable vs. category header) for a given ICD-10-CM diagnosis code.

## Facts

- Endpoint: GET https://medical-codes.x402tookit.com/icd10-lookup?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/icd-10-cm-code-lookup-c0898cad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iH8zH7of8wZXowMaEwRG5

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability icd-10-cm-code-lookup-c0898cad
```

Example prompt: What does ICD-10-CM code E11.9 mean — give me the official description, which chapter it belongs to, and whether it's a billable code or just a category header.

## When to prefer this

Use this endpoint when you need the authoritative official description, chapter classification, and billability status of a specific ICD-10-CM code and already know the code. For finding codes by keyword or symptom, prefer the ICD-10-CM search endpoint on the same service. This endpoint is ideal for decoding codes found in medical records, EHR exports, or insurance claims.

## Known failure modes

- Invalid or malformed code format returns an error or a verdict of invalid
- Non-existent ICD-10-CM code returns null description fields
- Deprecated codes may return degraded flag or no match
- Missing required 'code' query parameter causes a 400-level error
- Network or payment authorization failures result in no response

## How this service works

What an ICD-10-CM diagnosis code means: official description, chapter, and whether it is a complete code or a category header.

## Output

Returns the official ICD-10-CM description, the chapter (number, title, and range), the code set (e.g. ICD-10-CM), a verdict indicating whether the code is billable or a category header, the data as-of date, a source URL, and a disclaimer. May also include child codes if the code is a category, and degraded-mode flags if data is partial.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "code"
     ],
     "properties": {
      "code": {
       "type": "string",
       "description": "ICD-10-CM code, e.g. E11.9 or E119"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "code": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "chapter": {
       "type": [
        "null",
        "object"
       ],
       "properties": {
        "range": {
         "type": [
          "null",
          "string"
         ]
        },
        "title": {
         "type": [
          "null",
          "string"
         ]
        },
        "number": {
         "type": [
          "null",
          "number"
         ]
        }
       }
      },
      "codeSet": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "children": {
       "type": [
        "array",
        "null"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "sourceUrl": {
       "type": [
        "null",
        "string"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "description": {
       "type": [
        "null",
        "string"
       ]
      }
     }
    }

… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/icd-10-cm-code-lookup-c0898cad/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from medical-codes.x402tookit.com](https://www.zero.xyz/host/medical-codes.x402tookit.com/llms.txt)