Diagnosis Code L73.2 is a crucial classification within the International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) system. Specifically, L73.2 is used to denote Hidradenitis suppurativa, a chronic inflammatory skin condition. This code is billable and specific, meaning it is recognized for reimbursement purposes and pinpoints a precise diagnosis. Since its introduction to the ICD-10-CM in 2016, code L73.2 has remained consistently active through the 2025 update, effective from October 1, 2024. It’s important to note that while L73.2 is the American ICD-10-CM standard, international versions may have variations.
What is Hidradenitis Suppurativa?
Hidradenitis suppurativa (HS), often referred to as acne inversa, is a long-term skin disease affecting apocrine sweat glands. These glands are primarily located in areas like the armpits (axillae), groin, and the regions around the anus. HS is characterized by recurring inflammation, leading to painful symptoms and potential scarring. The condition begins with the blockage of hair follicles, followed by bacterial infection and the formation of abscesses. These abscesses can rupture, releasing pus, and over time, the disease can progress to form tunnels under the skin, known as sinus tracts. Fistulas, ulcers, and significant scarring are common in chronic cases of hidradenitis suppurativa.
The clinical presentation of hidradenitis suppurativa includes several key symptoms:
- Blackheads: Clusters of blackheads may appear in affected areas.
- Abscesses: Painful, red, and tender bumps (abscesses) develop. These can enlarge, break open, and drain pus.
- Tunnels: Sinus tracts or tunnels can form beneath the skin, connecting abscesses.
- Scarring: As the condition progresses, permanent scars are a common outcome.
While the exact cause of hidradenitis suppurativa is not fully understood, it is more prevalent in women, individuals of African-American descent, and those with a history of acne. Onset typically occurs after puberty. Management and treatment strategies for HS range from antibiotics and anti-inflammatory medications to surgical interventions in severe cases. Lifestyle adjustments, such as weight loss and wearing loose clothing, can also be beneficial in managing symptoms.
ICD-10-CM Code History and Context of L73.2
The diagnosis code L73.2 specifically for Hidradenitis suppurativa was established in 2016, marking the first year of the non-draft ICD-10-CM. Since its introduction, the code has remained unchanged in subsequent yearly updates, affirming its consistent use in medical coding and diagnostics. When using ICD-10-CM codes for claims with service dates on or after October 1, 2015, L73.2 is the designated code for hidradenitis suppurativa.
Within the broader ICD-10-CM classification, L73.2 is positioned amongst related codes concerning follicular disorders. Codes adjacent to L73.2 include conditions like pilar cysts (L72.11), steatocystoma multiplex (L72.2), sebaceous cysts (L72.3), and other follicular cysts. This grouping helps healthcare professionals and coders accurately categorize and differentiate various skin and subcutaneous tissue conditions related to hair follicles, ensuring precise diagnostic coding and billing processes. Understanding the specificity of diagnosis code L73.2 is essential for accurate medical documentation, insurance claims, and ultimately, effective patient care for those suffering from hidradenitis suppurativa.
