ICD-9 Code 705.83

Hidradenitis

Not Valid for Submission

705.83 is a legacy non-billable code used to specify a medical diagnosis of hidradenitis. This code was replaced on September 30, 2015 by its ICD-10 equivalent.

ICD-9: 705.83
Short Description:Hidradenitis
Long Description:Hidradenitis

Convert 705.83 to ICD-10

The following crosswalk between ICD-9 to ICD-10 is based based on the General Equivalence Mappings (GEMS) information:

  • L73.2 - Hidradenitis suppurativa

Code Classification

  • Diseases of the skin and subcutaneous tissue (680–709)
    • Other diseases of skin and subcutaneous tissue (700-709)
      • 705 Disorders of sweat glands

Information for Medical Professionals

Index to Diseases and Injuries

References found for the code 705.83 in the Index of Diseases and Injuries:


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:

  • Women
  • People with a family history of HS
  • People who are overweight or have obesity
  • Smokers

What are the symptoms of hidradenitis suppurativa (HS)?

The symptoms of HS include:

  • Small pitted areas of skin containing blackheads
  • Painful, red, lumps that get bigger and break open. This causes abscesses that drain fluid and pus. They may itch and have an unpleasant odor.
  • The abscesses heal very slowly, recur over time, and can lead to scarring and tunnels under the skin

HS can be mild, moderate, or severe:

  • In mild HS, there are only one or a few lumps in one area of the skin. A mild case will often get worse, becoming a moderate disease.
  • Moderate HS include recurrences of the lumps that get bigger and break open. The lumps form in more than one area of the body.
  • With severe HS, there are widespread lumps, scarring, and chronic pain that may make it hard to move

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:

  • Medicines, including steroids, antibiotics, pain relievers, and medicines that flight inflammation. In mild cases, the medicines may be topical. This means that you apply them to your skin. Otherwise the medicines may be injected or taken orally (by mouth).
  • Surgery for severe cases, to remove the lumps and scars

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

  • Wearing loose-fitting clothing
  • Staying at a healthy weight
  • Quitting smoking
  • Avoiding heat and humidity
  • Being careful not to injure your skin

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ICD-9 Footnotes

General Equivalence Map Definitions
The ICD-9 and ICD-10 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Index of Diseases and Injuries Definitions

  • And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
  • Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
  • Code first - Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
  • Type 1 Excludes Notes - A type 1 Excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • Type 2 Excludes Notes - A type 2 Excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • Inclusion terms - List of terms is included under some codes. These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
  • NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
  • See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
  • See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
  • 7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
  • With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.