Endometriosis in scar of skin

This code describes the presence of endometrial tissue abnormally located within a skin scar, typically following a surgical procedure such as a C-section or hysterectomy. This ectopic endometrial tissue responds to hormonal fluctuations, leading to cyclical pain, swelling, or bleeding at the scar site.

Use this code when documentation clearly indicates endometriosis specifically located within a cutaneous scar. This diagnosis is often made based on clinical presentation (cyclical pain/mass in a scar) and confirmed by biopsy.

• Ensure the documentation specifies "scar of skin" to differentiate from other ectopic sites.
• Consider sequencing this code after a code for the underlying surgical complication or condition, if applicable.
• Do not confuse with endometriosis in other extra-pelvic sites, which are coded differently.