M79.1Non-Billable (Header)MyalgiaExcludes 1 — Do NOT code togetherfibromyalgia (M79.7)myositis (M60.-)Child CodesM79.10Myalgia, unspecified siteM79.11Myalgia of mastication muscleM79.12Myalgia of auxiliary muscles, head and neckM79.18Myalgia, other siteCode Hierarchy└M79Other and unspecified soft tissue disorders, not elsewhere classified└M79.1Myalgia└M79.1Myalgia