2022 ICD-10-CM Code L73.2

Hidradenitis suppurativa

Version 2021

Valid for Submission

ICD-10:L73.2
Short Description:Hidradenitis suppurativa
Long Description:Hidradenitis suppurativa

Code Classification

  • Diseases of the skin and subcutaneous tissue (L00–L99)
    • Disorders of skin appendages (L60-L75)
      • Other follicular disorders (L73)

L73.2 is a billable diagnosis code used to specify a medical diagnosis of hidradenitis suppurativa. The code L73.2 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.

The ICD-10-CM code L73.2 might also be used to specify conditions or terms like anogenital hidradenitis suppurativa, axillary hidradenitis suppurativa, dermatosis resulting from cytotoxic therapy, drug-induced erythroderma, follicular occlusion tetrad - hidradenitis, acne conglobata, dissecting cellulitis, pilonidal sinus , follicular occlusion triad - hidradenitis, acne conglobata, dissecting cellulitis of scalp, etc.

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code L73.2 are found in the index:

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Clinical Information

Convert L73.2 to ICD-9 Code

Information for Patients


Hidradenitis Suppurativa

What is hidradenitis suppurativa (HS)?

Hidradenitis suppurativa (HS) is a chronic skin disease. It causes painful, boil-like lumps that form under the skin. It often affects areas where the skin rubs together, such as your armpits and groin. The lumps become inflamed and painful. They often break open, causing abscesses that drain fluid and pus. As the abscesses heal, they can cause scarring of the skin.

What causes hidradenitis suppurativa (HS)?

The lumps in HS form because of blockages of the hair follicles. The blocked hair follicles trap bacteria, which leads to inflammation and rupture. In most cases, the cause of the blockages is unknown. Genetics, environment, and hormonal factors may play a role. Some cases of HS are caused by changes in certain genes.

HS is not caused by bad hygiene, and it cannot be spread to others.

Who is at risk for hidradenitis suppurativa (HS)?

HS usually starts after puberty, usually in the teens or twenties. It is more common in

What are the symptoms of hidradenitis suppurativa (HS)?

The symptoms of HS include

HS can be mild, moderate, or severe:

Because of the difficulty of dealing with the disease, people with HS are at risk for depression and anxiety.

How is hidradenitis suppurativa (HS) diagnosed?

There is no specific test for HS, and it is often misdiagnosed in the early stages. To make a diagnosis, your health care provider will ask about your medical history and your symptoms. He or she will look at the lumps on your skin and test a sample of the skin or pus (if there is any).

What are the treatments for hidradenitis suppurativa?

There is no cure for HS. Treatments focus on the symptoms, but they are not always effective for everyone. The treatments depend on how severe the disease is, and they include

It may also help if you can avoid things that can irritate your skin, by


[Learn More in MedlinePlus]

Hidradenitis suppurativa

Hidradenitis suppurativa, also known as acne inversa, is a chronic skin disease characterized by recurrent boil-like lumps (nodules) under the skin. The nodules become inflamed and painful. They tend to break open (rupture), causing abscesses that drain fluid and pus. As the abscesses heal, they produce significant scarring of the skin.

The signs and symptoms of hidradenitis suppurativa appear after puberty, usually in a person's teens or twenties. Nodules are most likely to form in the armpits and groin. They may also develop around the anus, on the buttocks, or under the breasts. In some cases, nodules appear in other areas, such as the nape of the neck, waist, and inner thighs.

The recurrent nodules and abscesses cause chronic pain and can lead to self-consciousness, social isolation, and depression. Rarely, nodules on the buttocks can develop into a type of skin cancer called squamous cell carcinoma.


[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)