Question: Connecticut Subscriber Answer: This code can be tough to track down because there is no listing under Achilles tendon in ICD-9's alphabetical index, and you might not be inclined to look under sprain codes for a tendon tear injury. However, ICD-9 confirms that you're in the right place when you arrive at the 840-848 range of codes by supplying guidelines about other conditions that also qualify as sprains or strains. For diagnosis coding, a sprain or strain includes avulsion, hemarthrosis, laceration, rupture, or tear of a joint capsule, ligament, muscle, or tendon. If this definition isn't enough to ease your anxieties, ICD-9 also offers "Achilles tendon" as an example of when to use 845.09.