As of October 2015, ICD-9 codes are no longer used for medical coding. Instead, use this equivalent ICD-10-CM code, which is an exact match to ICD-9 code 717.4:
Non-Billable means the code is not sufficient justification for admission to an acute care hospital when used a principal diagnosis. Use a child code to capture more detail.
717.49 is a legacy non-billable code used to specify a medical diagnosis of other derangement of lateral meniscus. This code was replaced on September 30, 2015 by its ICD-10 equivalent.
References found for the code 717.49 in the Index of Diseases and Injuries:
Your knee joint is made up of bone, cartilage, ligaments and fluid. Muscles and tendons help the knee joint move. When any of these structures is hurt or diseased, you have knee problems. Knee problems can cause pain and difficulty walking.
General Equivalence Map Definitions The ICD-9 and ICD-10 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
Arthroscopy is classified to ICD-9-CM subcategory 80.2. A fourth digit is required to identify the joint being scoped. A code from this subcategory is assigned when it is the only procedure performed (eg, diagnostic procedure). If a more definitive procedure is done at the same time, a code for the arthroscopic approach is not assigned. According to Coding Clinic, surgical approaches (eg, scopes) are not coded if a more definitive procedure is performed. Therefore, if a procedure was done via a scope, assign a code for the procedure (open) performed until specific codes for the arthroscopic approach are created, but do not assign a separate code for the scope ( AHA Coding Clinic for ICD-9-CM, 1993, first quarter, page 23).
Ruptured or detached meniscus goes to the same codes for tear of meniscus except that recurrent detachment of meniscus is classified to code 718.36, Recurrent dislocation of joint, lower leg.