ICD procedure codes are required for inpatient hospital Part A claims only.

Healthcare Common Procedure Code System (HCPCS) codes are used for reporting procedures on other claim types.

Inpatient hospital claims require reporting the principal procedure if a significant procedure occurred during the hospitalization.

For information of the selection of the principal procedure, see the posted Official ICD-10-PCS  coding guidelines.

The principal procedure code and other procedure codes shown on the bill must contain the full ICD-10-PCS procedure code, including all applicable digits, up to seven digits.

Up to twenty four significant procedures other than the principal procedure may be reported.