Get ready for 7-digit specificity explaining sites of pain.
When your physician evaluates and treats patients for joint pain, you have numerous code choices under ICD-9 for diagnosis 719.4x (Pain in joint) based on anatomic site. Code specificity will move from five to seven digits when ICD-10 becomes effective in October 2013.
ICD-10 basics:
Currently, ICD-9-CM lists all anatomic sites for joint pain in the same fifth-digit category (719.4x). ICD-10 changes that by listing code options for pain in some joints as M25.5x (Pain in joint); you'll find the rest at M79.6x (Other soft tissue disorders; pain in limb, hand, foot, [...]