Which coding system is used to report procedures and services on inpatient hospital claims?

The coding system used to report procedures and services on inpatient hospital claims is ICD-10-PCS. This set of codes is specifically designed for the inpatient setting and is utilized primarily in hospital billing for tracking inpatient procedures. ICD-10-PCS consists of alphanumeric codes that provide detailed information regarding the procedures performed during a patient's hospital stay, capturing complex procedures that may involve multiple steps or levels of specificity.

In contrast, CPT (Current Procedural Terminology) is designed mainly for outpatient providers and is often used for services and procedures performed by healthcare providers outside of a hospital setting. ICD-10-CM (International Classification of Diseases, Tenth Revision, Clinical Modification) is primarily used for coding diagnoses and not procedures. HCPCS Level II codes, while used for various health services, are not specifically focused on inpatient hospital procedures. Thus, ICD-10-PCS is the appropriate choice for reporting such services within the context of inpatient hospital claims.