Question: How will the 2019 ICD-10 revisions affect orthopedic diagnosis coding? Codify Subscriber Answer: For orthopedic practices treating a patient with myalgia, there are several changes that might affect your reporting. The ICD-10-CM manual for 2019 will include the following codes: This makes reporting for myalgia more specific, which will help the provider paint a more accurate picture of the patient’s condition. In 2018, you would have reported M79.1 (Myalgia) for any type of myalgia. Remember: According to CMS, you should start using the 2019 codes later this year per usual. “These 2019 ICD-10 codes are to be used for discharges occurring from Oct. 1, 2018 through Sept. 30, 2019,” CMS reports on its website.