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Documentation Index

Fetch the complete documentation index at: https://docs.corti.ai/llms.txt

Use this file to discover all available pages before exploring further.

The US inpatient procedure coding system, developed by CMS. Required for every procedure on inpatient hospital claims. Over 78,000 seven-character alphanumeric codes, where each character position has a distinct classification axis covering surgical, imaging, and therapeutic procedures. Use alongside ICD-10-CM for diagnosis coding. For outpatient procedures, use CPT instead.

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Quick start

System identifier: icd10pcs 
curl -X POST "https://api.$environment.corti.app/v2/tools/coding/" \
  -H "Authorization: Bearer <token>" \
  -H "Tenant-Name: <tenant-name>" \
  -H "Content-Type: application/json" \
  -d '{
    "system": ["icd10pcs"],
    "context": [{"type": "text", "text": "Patient underwent laparoscopic appendectomy for acute appendicitis."}]
  }'
API reference →
ICD-10-PCS is for inpatient procedures only. For outpatient procedures and physician services, use CPT.