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  4. C45-C49
  5. Kaposi's sarcoma (C46)

Kaposi's sarcoma (C46)

Kaposi's sarcoma ICD-10 codes (C46 series) are specifically used to classify and document various forms of Kaposi's sarcoma, a cancer that affects blood vessel cells and commonly appears in the skin, lymph nodes, and internal organs.

These codes cover distinct locations of Kaposi's sarcoma, such as C46.0 for skin (also known as primary Kaposi sarcoma of skin or soft tissue), C46.1 for soft tissue, and C46.2 for palate. The classification extends to internal sites like C46.3 for lymph nodes, C46.4 for gastrointestinal sites (including stomach, colon, and rectum), and C46.5 and its subcodes for lung involvement. Additionally, C46.7 designates Kaposi's sarcoma at other less common sites such as the eyelid, conjunctiva, and oral cavity. The unspecified code C46.9 covers cases when the location is not documented or when multiple organs are involved, including various clinical forms like endemic or AIDS-related Kaposi’s sarcoma. Medical coders use these precise ICD-10 codes to document and differentiate Kaposi's sarcoma presentations, ensuring accurate diagnosis and treatment tracking.

Instructional Notations

Code First

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

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