New ICD-10 Myalgia codes for 2019

There are changes to CPT codes for 2019 that will directly affect Chiropractors, specifically the Myalgia codes. The newest codes are named ICD-10 2019 but actually went into effect on October 1, 2018. Previously M79.1 covered any type of Myalgia, regardless of location. That codes will no longer be a billable/payable code. The new codes for 2019 are much more specific:

• M79.10 — Myalgia, unspecified site

• M79.11 — Myalgia of mastication muscle

• M79.12 — Myalgia of auxiliary muscles, head and neck

• M79.18 — Myalgia, other site

Always be as specific as possible. The unspecified code remains for claims for services prior to October 1, 2018 and should be avoided for any claims thereafter. The most common code chiropractors will use is M79.12, which identifies and involves the muscle of the neck and head.