359.6 Symptomatic inflammatory myopathy in diseases classified elsewhere
Code first underlying disease, as:
amyloidosis (277.30-277.39)
disseminated lupus erythematosus (710.0)
malignant neoplasm (140.0-208.9)
polyarteritis nodosa (446.0)
rheumatoid arthritis (714.0)
sarcoidosis (135)
scleroderma (710.1)
Sjögren's disease (710.2)