How are codes divided in the Hemic and Lymphatic System subsection of the CPT manual?

In the Hemic and Lymphatic System subsection of the CPT manual, codes are divided into categories based on specific types of procedures and services related to blood and lymphatic structures. This includes codes for bone marrow procedures, lymphatic drainage, and blood transfusions. The codes are organized to facilitate the identification of various surgical interventions, diagnostic procedures, and therapeutic services pertaining to hematologic and lymphatic conditions. Each category is further classified by the complexity and anatomical site of the procedure.