2026 ICD-10-CM Diagnosis Code L83Acanthosis nigricans

ICD-10-CM Codes›L00–L99›L80-L99›L83

ICD-10-CM L83
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L83 is a billable ICD-10-CM diagnosis code for acanthosis nigricans. 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 and unspecified skin disorders.

Code Identity

ICD-10-CM Code
L83
Billable Status
Yes — Valid for Submission
Code Describes
Acanthosis nigricans
Chapter
L80-L99
Other disorders of the skin and subcutaneous tissue

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL80-L99Other disorders of the skin and subcutaneous tissue
CategoryL83Acanthosis nigricans
This CodeL83Acanthosis nigricans

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acanthosis nigricans
  • Acanthosis nigricans and insulin resistance with muscle cramp and acral enlargement syndrome
  • Acanthosis nigricans due to type 2 diabetes mellitus
  • Acanthosis nigricans of oral mucous membranes
  • Acanthosis palmaris
  • Acquired acanthosis nigricans
  • Confluent AND reticulate papillomatosis
  • Crouzon syndrome
  • Crouzon syndrome with acanthosis nigricans
  • Cutaneous papillomatosis
  • Dermopathy due to type 2 diabetes mellitus
  • Diabetes mellitus due to genetic defect in insulin action
  • Diabetic dermopathy
  • Drug pigmentation
  • Drug-induced acanthosis nigricans
  • Drug-induced hypermelanosis
  • Drug-induced pigmentation
  • Extreme insulin resistance with acanthosis nigricans, hirsutism AND abnormal insulin receptors
  • Extreme insulin resistance with acanthosis nigricans, hirsutism AND autoantibodies to the insulin receptors
  • Fibroblast growth factor receptor 3-related craniosynostosis
  • Hirsutism
  • Hypermelanosis due to neoplasia
  • Insulin receptor defect
  • Lelis syndrome
  • Malignant acanthosis nigricans

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Confluent and reticulated papillomatosis

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.

    • Acanthosis(acquired) (nigricans)
    • Gougerot-Carteaud disease or syndrome(confluent reticulate papillomatosis)
    • Keratosis
      • nigricans
    • Papillomatosis
      • confluent and reticulated

Clinical ClassificationClinical

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

CCSR SKN007
Other specified and unspecified skin disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Acanthosis Nigricans

    a circumscribed melanosis consisting of a brown-pigmented, velvety verrucosity or fine papillomatosis appearing in the axillae and other body folds. it occurs in association with endocrine disorders, underlying malignancy, administration of certain drugs, or as in inherited disorder.

  • Hirsutism

    a condition observed in women and children when there is excess coarse body hair of an adult male distribution pattern, such as facial and chest areas. it is the result of elevated androgens from the ovaries, the adrenal glands, or exogenous sources. the concept does not include hypertrichosis, which is an androgen-independent excessive hair growth.

  • Acanthosis Nigricans

    a melanotic cutaneous lesion that develops in the axilla and other body folds. it may be idiopathic, drug-induced, or it may be associated with the presence of an endocrine disorder or malignancy.

  • Hyperandrogenism, Insulin Resistance, Acanthosis Nigricans Syndrome|HAIR-AN Syndrome

    a condition characterized by hyperandrogenism, insulin resistance, and acanthosis nigricans, typically associated with obesity in teenage girls. it is considered to be a subtype of polycystic ovarian syndrome, but may occur in male individuals. etiology is unclear, but some cases may be associated with mutations affecting the tyrosine kinase domain of the insulin receptor.

  • Insulin Resistant Diabetes Mellitus with Acanthosis Nigricans and Hyperandrogenism|Type A Insulin Resistance Syndrome

    a syndrome of insulin resistance caused by mutation(s) in the insr gene, encoding the insulin receptor. this condition is characterized by a clinical triad of hyperinsulinemia, acanthosis nigricans, and hyperandrogenism without lipodystrophy. this is the least severe of a spectrum of disorders; the other two conditions are rabson-mendenhall syndrome and donohoe syndrome.

  • Grade 1 Hirsutism, CTCAE|Grade 1 Hirsutism

    in women, increase in length, thickness or density of hair in a male distribution that the patient is able to camouflage by periodic shaving, bleaching, or removal of hair

  • Grade 2 Hirsutism, CTCAE|Grade 2 Hirsutism

    in women, increase in length, thickness or density of hair in a male distribution that requires daily shaving or consistent destructive means of hair removal to camouflage; associated with psychosocial impact

  • Hirsutism

    male-pattern hair growth on a female.

  • Hirsutism, CTCAE|Hirsutism|Hirsutism

    a disorder characterized by the presence of excess hair growth in women in anatomic sites where growth is considered to be a secondary male characteristic and under androgen control (beard, moustache, chest, abdomen).

  • Androgen-dependent Hirsutism|Androgen-dependent hirsutism

    hirsutism that arises from an excess of male hormones.

Patient EducationClinical

Skin Pigmentation Disorders

Pigmentation means coloring. Skin pigmentation disorders affect the color of your skin. Your skin gets its color from a pigment called melanin. Special cells in the skin make melanin. When these cells become damaged or unhealthy, it affects melanin production. Some pigmentation disorders affect just patches of skin.

Read the full article at MedlinePlus

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

Convert L83 to ICD-9-CMHistory

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

ICD-9-CM
701.2 Acq acanthosis nigricans
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 L83Overview

Is L83 (Acanthosis nigricans) a billable code?

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

What MS-DRG does L83 group to?

When acanthosis nigricans 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 L83?

Under the General Equivalence Mappings, acanthosis nigricans converts to ICD-9-CM 701.2 (acq acanthosis nigricans). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.