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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Musculoskeletal System And Connective Tissue 710-739 > Arthropathies And Related Disorders 710-719 > Diffuse Diseases Of Connective Tissue 710.* > 2007 ICD-9-CM Diagnosis 710.9 Unspecified diffuse connective tissue disease  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 710.9 can be accessed here. Historically, a heterogeneous group of acute and chronic diseases, including rheumatoid arthritis, systemic lupus erythematosus, progressive systemic sclerosis, dermatomyositis, etc. This classification was based on the notion that "collagen" was equivalent to "connective tissue", but with the present recognition of the different types of collagen and the aggregates derived from them as distinct entities, the term "collagen diseases" now pertains exclusively to those inherited conditions in which the primary defect is at the gene level and affects collagen biosynthesis, post-translational modification, or extracellular processing directly. (From Cecil Textbook of Medicine, 19th ed, p1494) 710.9 is a specific code that can be used to specify a diagnosis 710.9 contains 9 index entries View the ICD-9-CM Volume 1 710.* hierarchy 710.9 also known as: Collagen disease NOS Index entries containing 710.9: Collagen disease NEC 710.9 nonvascular 710.9 vascular (allergic) (see also Angiitis, hypersensitivity) 446.20 Collagenosis (see also Collagen disease) 710.9 cardiovascular 425.4 mediastinal 519.3 Disease, diseased - see also Syndrome collagen NEC 710.9 nonvascular 710.9 specified NEC 710.8 vascular (allergic) (see also Angiitis, hypersensitivity) 446.20 connective tissue, diffuse (see also Disease, collagen) 710.9 mesenchymal 710.9 Dyscollagenosis 710.9 Skin - see also condition hidebound 710.9