2026 ICD-10-CM Diagnosis Code L73.2Hidradenitis suppurativa

ICD-10-CM Codes›L00–L99›L60-L75›L73

ICD-10-CM L73.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L73.2 is a billable ICD-10-CM diagnosis code for hidradenitis suppurativa. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified inflammatory condition of skin.

Code Identity

ICD-10-CM Code
L73.2
Billable Status
Yes — Valid for Submission
Code Describes
Hidradenitis suppurativa
Short Description
Hidradenitis suppurativa
Same as the full description in the CMS dataset.
Parent Code
L73
Other follicular disorders

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL60-L75Disorders of skin appendages
CategoryL73Other follicular disorders
This CodeL73.2Hidradenitis suppurativa

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Ankylosing spondylitis
  • Anogenital hidradenitis suppurativa
  • Axillary hidradenitis suppurativa
  • Dermatosis due to cytotoxic therapy
  • Follicular occlusion tetrad - hidradenitis, acne conglobata, dissecting cellulitis, pilonidal sinus
  • Follicular occlusion triad - hidradenitis, acne conglobata, dissecting cellulitis of scalp
  • Hidradenitis
  • Hidradenitis suppurativa
  • Hidradenitis suppurativa of anus
  • Hidradenitis suppurativa of multiple sites
  • Hidradenitis suppurativa of vulva
  • Hidradenitis suppurativa pyoderma gangrenosum complex
  • Infective dermatosis of female genitalia
  • Neutrophilic eccrine hidradenitis
  • Neutrophilic eccrine hidradenitis due to cytotoxic therapy
  • PAPASH syndrome
  • PASS syndrome
  • Perianal dermatitis
  • PsAPASH syndrome
  • Psoriatic arthritis
  • Pyoderma gangrenosum, acne, suppurative hidradenitis syndrome
  • Retro-auricular cysts

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Disease, diseased
      • Pollitzer's (hidradenitis suppurativa)
    • Hidradenitis(axillaris) (suppurative)
    • Hydradenitis(axillaris) (suppurative)
    • Hydroadenitis(axillaris) (suppurative)
    • Hydrosadenitis(axillaris) (suppurative)
    • Pollitzer's disease

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SKN002
Other specified inflammatory condition of skin
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • 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.

  • 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 inflammation of the apocrine sweat glands, that is characterized by clusters of bumps or sores.

  • Neutrophilic Eccrine Hidradenitis

    painful red or pink edematous nodules most commonly found on the palmar and/or plantar regions.

  • Hidradenitis

    inflammation of the apocrine sweat glands, characterized by redness, itching, pain or swelling of the sweat glands, usually in the axillae or groin.

  • Infectious Hidradenitis

    hidradenitis that is caused by an infectious agent, usually a bacterium.

Patient EducationClinical

Hidradenitis Suppurativa

Hidradenitis suppurativa (HS) is a chronic skin disease. Another name for it is acne inversa. 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.

The full article covers:

  • What is hidradenitis suppurativa (HS)?
  • What causes hidradenitis suppurativa (HS)?
  • Who is more likely to get hidradenitis suppurativa (HS)?
  • What are the symptoms of hidradenitis suppurativa (HS)?
  • How is hidradenitis suppurativa (HS) diagnosed?
  • What are the treatments for hidradenitis suppurativa?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert L73.2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
705.83 Hidradenitis
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About L73.2Overview

Is L73.2 (Other follicular disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report hidradenitis suppurativa on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L73.2 group to?

When hidradenitis suppurativa is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of L73.2?

Under the General Equivalence Mappings, hidradenitis suppurativa converts to ICD-9-CM 705.83 (hidradenitis). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.