Folliculitis decalvans

This code represents a rare, chronic inflammatory scalp condition characterized by progressive, scarring alopecia. It typically presents with follicular pustules, erosions, and crusting, leading to permanent hair loss and smooth, atrophic patches. The condition is often associated with bacterial colonization, particularly Staphylococcus aureus.

Use this code for documented cases of folliculitis decalvans, where the clinical presentation and/or biopsy findings confirm the diagnosis. Documentation should clearly describe the characteristic scarring alopecia, follicular inflammation, and pustule formation. This code is appropriate for both initial diagnoses and subsequent encounters for management of this chronic condition.

• Ensure documentation differentiates this scarring alopecia from non-scarring forms.
• Do not confuse with other forms of folliculitis (e.g., bacterial folliculitis, pseudofolliculitis barbae) which have distinct codes.
• Consider coding any associated bacterial infections (e.g., Staphylococcus aureus) as secondary diagnoses, if documented and treated.