What coding classification system is primarily used for hospital inpatient coding?

The correct coding classification system primarily used for hospital inpatient coding is the ICD-10-PCS. This system specifically caters to inpatient settings and is designed to capture all procedures performed during a patient's hospital stay.

ICD-10-PCS, or the International Classification of Diseases, Tenth Revision, Procedure Coding System, is distinct from its companion diagnosis coding system, ICD-10-CM, which is used primarily for outpatient and diagnostic services. ICD-10-PCS includes a comprehensive set of codes that identifies various surgical procedures and interventions performed on hospital inpatients, encompassing a wide range of medical specialties.

The other options, while important in their respective contexts, do not apply specifically to hospital inpatient coding. HCPCS (Healthcare Common Procedure Coding System) and CPT (Current Procedural Terminology) codes are primarily used for outpatient services, physician billing, and other non-inpatient procedures. Thus, for inpatient hospital coding, ICD-10-PCS is indeed the system that is utilized to ensure accurate and comprehensive documentation of all procedures performed.