Personal history of in-situ neoplasm of skin

This code indicates that a patient has a past medical history of a non-invasive, localized cancerous growth of the skin that has been completely removed. "In-situ" means the abnormal cells were confined to the original site and had not spread to surrounding tissue.

Use this code when documenting a patient's history of a successfully treated carcinoma in situ of the skin, such as squamous cell carcinoma in situ (Bowen's disease) or melanoma in situ. This code is appropriate for follow-up visits or when the history is relevant to current care, but the in-situ neoplasm is no longer present.

• Do not use this code if the patient currently has an active in-situ neoplasm; instead, code the active condition.
• This code is for personal history only; do not use for family history.
• Always sequence this code as a secondary diagnosis, as it describes a historical condition rather than a current illness requiring treatment.