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ICD-10 Procedure Coding System. Used exclusively for inpatient hospital procedures in the United States. Developed by CMS. Every inpatient procedure, service, and diagnostic test must be coded with ICD-10-PCS for reimbursement.
  • 7-character alphanumeric codes — each character has a specific axis of classification
  • Over 78,000 codes covering surgical, medical, imaging, nuclear medicine, and other procedures
  • Used alongside ICD-10-CM for inpatient claims (diagnosis + procedure)
  • Procedures that are part of another bigger procedure should not be coded.
ICD-10-PCS is for inpatient procedures only. For outpatient procedures and physician services, use CPT.