2007 ICD-9-CM Procedure 40.40 Radical neck dissection, not otherwise specified A surgical operation for head and neck malignancies, most of which are squamous cell carcinomas. The neck is opened laterally, the majority of the sternocleidomastoid muscle is removed, as are the regional cervical lymph nodes, the jugular vein, the spinal accessory nerve, the submaxillary gland and most of the parotid gland. There are several modifications. (From Segen, Dictionary of Modern Medicine, 1992, p605) 40.40 is a specific code that can be used to specify a procedure 40.40 contains 3 index entries View the full Volume 3 40.* hierarchy Index entries containing 40.40: Block dissection neck 40.40 Dissection -- see also Excision neck, radical 40.40 with laryngectomy 30.4 bilateral 40.42 unilateral 40.41 Excision lymph, lymphatic node (simple) NEC 40.29 cervical (deep) (with excision of scalene fat pad) 40.21 radical (including muscle and deep fascia) 40.40 bilateral 40.42 unilateral 40.41