Complete ICD-10-CM coding and documentation guide for icd-10 coding for connective tissue disorder includes clinical validation requirements, medical necessity guidelines, and coding policies.
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Essential facts and insights about ICD-10 Coding for Connective Tissue Disorder
Use ICD-10 code M35.9 for systemic involvement of connective tissue, unspecified, ensuring proper documentation in clinical notes.
Additional codes that may be used with this diagnosis
Pulmonary hypertension secondary to connective tissue disease
Use when pulmonary hypertension is a complication of the connective tissue disorder.
Interstitial lung disease, unspecified
Use when lung involvement is present.
The ICD-10 code for an unspecified connective tissue disorder is M35.9. For mixed connective tissue disease, use M35.1 when specific serologic markers are present.
Code mixed connective tissue disease as M35.1 when there is evidence of anti-U1 RNP antibodies and clinical overlap features.