Z90: Acquired absence of organs, not elsewhere classified

Z90.0: Acquired absence of part of head and neck

Acquired absence of part of the head and neck, as indicated by the ICD-10 code Z90.0, refers to the medical condition where a portion of the patient's head or neck is missing due to reasons other than birth defects. This typically occurs as a result of a surgical procedure, an injury, or a traumatic event that necessitates the removal or loss of a specific part. For example, a patient may have had a portion of their skull removed in a surgical process or lost a portion of their neck tissue due to a severe burn or other injury. This absence impacts the individual's physical appearance and may also affect certain functions depending on the specific part that is missing. The symptoms, disease progression, and impacts vary greatly depending on the specifics of the missing portion and the events that led to its loss.