AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2017 Issue 4; New/Revised ICD-10-CM Diagnosis Codes

Dermatomyositis

New codes have been created for juvenile dermatomyositis without myopathy (M33.03), other dermatomyositis without myopathy (M33.13) and unspecified dermatopolymyositis without myopathy (M33.93). In addition, the titles for codes at subcategories M33.0, Juvenile dermatopolymyositis, and M33.1, Other dermatopolymyositis, have been revised to align with the original World Health Organization (WHO) titles. The revised titles replace the term “dermatopolymyositis” with “dermatomyositis.” Dermatomyositis is a rare, idiopathic inflammatory disease with chronic myopathy involving proximal muscle weakness, distinctive rash, characteristic muscle biopsy findings, and elevations in muscle enzymes on laboratory evaluation. The rash is patchy...

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