Other follicular disorders (L73)
The ICD-10 code section L73 covers a group of skin conditions called other follicular disorders, which affect hair follicles in various ways. These codes help healthcare providers classify and document specific follicular diseases.
This section includes codes such as L73.0 for Acne keloidalis; also known as scalp folliculitis or keloidalis nuchae; characterized by bumps and scarring typically on the back of the head. L73.1 designates Pseudofolliculitis barbae, commonly referred to as razor bumps or pili incarnati, an irritation caused by ingrown hairs often seen in beard areas. L73.2 covers Hidradenitis suppurativa, a chronic inflammatory condition affecting sweat glands that can involve painful nodules and abscesses in areas like the armpits and groin. Other follicular conditions, such as acute or chronic folliculitis, sebaceous gland issues, and other specified follicular disorders, fall under codes L73.8 and L73.9. Using these specific ICD-10 codes for follicular disorders ensures precise diagnosis and treatment documentation for a variety of hair follicle-related skin problems.
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Acne Keloid
A type of acneiform disorder in which secondary pyogenic infection in and around pilosebaceous structures ends in keloidal scarring. It manifests as persistent folliculitis of the back of the neck associated with occlusion of the follicular orifices. It is most often encountered in black or Asian men.
Folliculitis
Inflammation of follicles, primarily hair follicles.
Hidradenitis
The inflammation of a sweat gland (usually of the apocrine type). The condition can be idiopathic or occur as a result of or in association with another underlying condition. Neutrophilic eccrine hidradenitis is a relatively rare variant that has been reported in patients undergoing chemotherapy, usually for non-Hodgkin lymphomas or leukemic conditions.
Hidradenitis Suppurativa
A chronic suppurative and cicatricial disease of the apocrine glands occurring chiefly in the axillae in women and in the groin and anal regions in men. It is characterized by poral occlusion with secondary bacterial infection, evolving into abscesses which eventually rupture. As the disease becomes chronic, ulcers appear, sinus tracts enlarge, fistulas develop, and fibrosis and scarring become evident.
Tinea Versicolor
A common chronic, noninflammatory and usually symptomless disorder, characterized by the occurrence of multiple macular patches of all sizes and shapes, and varying in pigmentation from fawn-colored to brown. It is seen most frequently in hot, humid, tropical regions and is mostly caused by MALASSEZIA FURFUR (formerly Pityrosporum orbiculare).
