L60-L75: Disorders of skin appendages

L65: Other nonscarring hair loss

Other nonscarring hair loss, as classified under L65 in the ICD-10 WHO 2016 system, encompasses a group of conditions characterized by hair loss or thinning that do not cause permanent damage to the hair follicles. This group of conditions occurs due to a variety of causes, including nutritional deficiencies, hormonal imbalances, stress or illness. Other nonscarring hair loss conditions can also occur due to physical factors, such as frequent pulling of the hair or wearing tight hairstyles. Common symptoms include noticeable thinning or patchy hair loss, typically without accompanying redness, itchiness, or other signs of scalp inflammation. Although other nonscarring hair loss conditions are typically not progressive, they can cause significant distress due to changes in physical appearance. The primary system affected in these conditions is the integumentary system, specifically the hair follicles within the skin.