Which coding system encompasses both diagnoses and procedures?

The coding system that encompasses both diagnoses and procedures is the HCPCS (Healthcare Common Procedure Coding System). HCPCS includes two levels: Level I codes which are identical to the Current Procedural Terminology (CPT) codes that represent procedures, and Level II codes that represent non-physician services, medical supplies, and other items not covered by CPT.

ICD (International Classification of Diseases) primarily focuses on coding for diagnoses and diseases, not procedures. Although ICD codes are crucial for capturing the diagnostic aspect of patient care, they do not provide procedural coding. CPT (Current Procedural Terminology) is specifically designed for coding medical procedures and services performed by physicians and healthcare providers, but it does not include diagnoses.

Thus, HCPCS is the only coding system that integrates both aspects, making it the correct answer for this question.