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Credentialing Glossary

ICD-10-PCS

medical-coding

Definition

Procedure Coding System used on inpatient hospital claims (UB-04). 79,115 codes in 2026. Each PCS code is exactly 7 characters built from a structured grammar: section, body system, root operation, body part, approach, device, qualifier. Used only on inpatient facility claims (not professional or outpatient). Outpatient hospitals and physicians use CPT and HCPCS instead.
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