2026 ICD-10-CM Diagnosis Code L98.9Disorder of the skin and subcutaneous tissue, unspecified

ICD-10-CM Codes›L00–L99›L80-L99›L98

ICD-10-CM L98.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L98.9 is a billable ICD-10-CM diagnosis code for disorder of the skin and subcutaneous tissue, unspecified. 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
L98.9
Billable Status
Yes — Valid for Submission
Code Describes
Disorder of the skin and subcutaneous tissue, unspecified
Short Description
Disorder of the skin and subcutaneous tissue, unspecified
Same as the full description in the CMS dataset.
Parent Code
L98
Other disorders of skin and subcutaneous tissue, not elsewhere classified

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL80-L99Other disorders of the skin and subcutaneous tissue
CategoryL98Other disorders of skin and subcutaneous tissue, not elsewhere classified
This CodeL98.9Disorder of the skin and subcutaneous tissue, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute skin disorder
  • Adverse cutaneous reaction to acupuncture
  • Adverse cutaneous reaction to carrier oil
  • Adverse cutaneous reaction to diagnostic procedure
  • Adverse cutaneous reaction to herbal medicine
  • Adverse cutaneous reaction to homeopathic medicine
  • Adverse cutaneous reaction to volatile oil
  • Adverse reaction to oil
  • Amputation-related dermatosis
  • Angular cheilitis
  • Animal-induced dermatosis
  • Anthozoa injury of skin
  • Arthropod dermatosis
  • Change in skin lesion
  • Chemical-induced dermatological disorder
  • Chronic disease of skin
  • Circumscribed palmoplantar keratoderma
  • Cold-induced dermatosis
  • Complication of diagnostic procedure
  • Complication of hemodialysis
  • Congenital hypotrichia
  • Crohn's disease of parastomal skin
  • Crohn's disease of skin
  • Cutaneous disorder caused by bovine papular stomatitis virus
  • Cutaneous inflammation due to cytotoxic therapy
  • Cutaneous lesion resulting from spinal dysraphism
  • Cutaneous reaction caused by bacterial toxin
  • Cutaneous reaction caused by Mollusk venom
  • Cutaneous reaction due to octopus bite
  • Cutaneous reaction to Cnidaria
  • Cutaneous reaction to Cubozoa
  • Cutaneous reaction to injected foreign material
  • Cutaneous reaction to Physalia
  • Cutaneous reaction to Scyphozoa
  • Dermatoses caused by Crustacea
  • Dermatosis associated with biotin deficiency
  • Dermatosis caused by algae
  • Dermatosis caused by Arachnida
  • Dermatosis caused by beetle
  • Dermatosis caused by centipede
  • Dermatosis caused by Coelenterata
  • Dermatosis caused by coumarin
  • Dermatosis caused by Echinoidea
  • Dermatosis caused by food mite
  • Dermatosis caused by harvest mite
  • Dermatosis caused by Hymenoptera
  • Dermatosis caused by immunosuppressant
  • Dermatosis caused by insect mite
  • Dermatosis caused by Insecta
  • Dermatosis caused by lice
  • Dermatosis caused by moth and/or butterfly
  • Dermatosis caused by scorpion
  • Dermatosis caused by spider
  • Dermatosis caused by tick
  • Dermatosis caused by zoonotic mite
  • Dermatosis due to cytotoxic therapy
  • Dermatosis in childhood
  • Dermatosis of anus
  • Dermatosis of external ear
  • Dermatosis of external genitalia
  • Dermatosis of infancy
  • Dermatosis of perianal region caused by Enterobius vermicularis
  • Dermatosis of perineum
  • Dermatosis of scalp
  • Dermatosis resulting from anticoagulant therapy
  • Dermatosis resulting from arterial insufficiency
  • Dermatosis resulting from intravascular thrombosis
  • Dermatosis resulting from small vessel insufficiency
  • Dermatosis secondary to peripheral nerve disorder
  • Disease caused by Oxyuroidea
  • Disease caused by Parapoxvirus
  • Disease of skin and subcutaneous tissue complicating pregnancy, childbirth and/or puerperium
  • Disorder caused by bovine papular stomatitis virus
  • Disorder of integument
  • Disorder of nail due to dermatosis
  • Disorder of perianal skin
  • Disorder of scalp
  • Disorder of skin
  • Disorder of skin and/or subcutaneous tissue
  • Disorder of skin AND/OR subcutaneous tissue of flank
  • Disorder of skin AND/OR subcutaneous tissue of head
  • Disorder of skin AND/OR subcutaneous tissue of neck
  • Disorder of skin AND/OR subcutaneous tissue of trunk
  • Disorder of skin appendage
  • Disorder of skin caused by epidermal growth factor receptor inhibitor
  • Disorder of skin caused by tattoo ink
  • Disorder of skin co-occurrent with human immunodeficiency virus infection
  • Disorder of skin following procedure
  • Disorder of skin of head
  • Disorder of skin of lower limb
  • Disorder of skin of lower limb due to disorder of vein of lower limb
  • Disorder of skin of neck
  • Disorder of skin of trunk
  • Disorder of skin of upper limb
  • Disorder of subcutaneous tissue
  • Disorders of skin induced by physical agents
  • Drug-induced dermatosis
  • Exogenous hand eczema
  • Extraintestinal Crohn's
  • Finger grip mark
  • Focal acral hyperkeratosis
  • Friction dermatosis
  • Friction eczema
  • Friction palmar eczema
  • Heat-induced dermatosis
  • Herbal medicine adverse reaction
  • Hereditary disorder of the integument
  • Hereditary hypotrichosis with recurrent skin vesicles syndrome
  • Homeopathic medicine adverse reaction
  • Infection by Enterobius vermicularis
  • Infestation by Trombicula
  • Inflammatory dermatosis
  • Lepromatous skin complications
  • Lesion of face
  • Lesion of mucosa
  • Lesion of neck
  • Lesion of scalp
  • Lesion of skin and/or skin-associated mucous membrane
  • Lesion of skin of face
  • Lesion of skin of foot
  • Marfan's syndrome
  • Marfan's syndrome affecting skin
  • Menstrual cycle related dermatosis
  • Nail dystrophy associated with dermatological disease
  • Nakajo-Nishimura syndrome
  • Neurotrophic damage to skin
  • Occupational cold-induced dermatosis
  • Occupational heat-induced dermatosis
  • Occupational skin disease
  • Occupational toxicoderma
  • Pinch mark
  • PLACK syndrome
  • Pseudoscleroderma due to amyloid light-chain amyloidosis
  • Punctate palmoplantar keratoderma
  • Radiation recall reaction due to cytotoxic therapy
  • Scleroderma-like secondary cutaneous sclerosis
  • Self-inflicted skin lesions
  • Sequelae of leprosy
  • Site-specific disorder of skin
  • Skin and subcutaneous tissue complication following chemexfoliation of skin
  • Skin and subcutaneous tissue complication following insertion of filling material under skin
  • Skin and subcutaneous tissue damage caused by snake venom
  • Skin damage resulting from acquired nerve disorder
  • Skin disease attributable to corticosteroid therapy
  • Skin disease caused by arsenic
  • Skin disorder due to phototherapy
  • Skin disorder of genitalia and perineum
  • Skin disorder of umbilicus
  • Skin disorder treatment changed
  • Skin disorder treatment started
  • Skin lesion
  • Skin lesion associated with hemodialysis
  • Skin lesion due to drug overdose
  • Skin lesion due to intravenous drug abuse
  • Skin lesion in drug addict
  • Skin mark
  • Skin plaque
  • Skin reaction to vesicant poison
  • Subcutaneous fat disorder
  • Toxicoderma
  • Ulcer
  • Ultraviolet recall reaction due to cytotoxic therapy
  • Vitamin A-responsive dermatosis

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.

    • Dermatosis
    • Disease, diseased
      • cellular tissue
    • Disease, diseased
      • skin
    • Disorder(of)
      • skin
    • Lesion(s) (nontraumatic)
      • skin
    • Sore
      • skin

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

  • Folliculin|BHD|BHD Skin Lesion Fibrofolliculoma Protein|Birt-Hogg-Dube Syndrome Protein|FLCN

    folliculin protein (579 aa, ~64 kda) is encoded by the human flcn gene. this protein is purported to play a role in tumor suppresion, but an exact function has yet to be identified. mutations and truncations in the protein have been implicated in the pathogenesis of fibrofolliculoma formation, birt-hogg-dube syndrome, and colorectal tumorigenesis.

  • Localized Skin Lesion

    a pathologic process that affects the skin and is confined to a specific area.

  • Skin Lesion

    a localized pathological or traumatic structural change, damage, deformity, or discontinuity of skin.

  • Skin Lesion Surgery

    a surgical procedure to remove a skin lesion and a margin around the area.

  • Skin Lesion 15-200 mm

    a skin lesion that measures between 15 and 200 mm in greatest dimension.

  • Skin Lesion Less Than 15 mm

    a skin lesion that measures less than 15 mm in greatest dimension.

  • Skin Lesion More Than 200 mm

    a skin lesion that measures more than 200 mm in greatest dimension.

  • Cutaneous Precancerous Condition|Cutaneous Premalignant Condition|Precancerous Dermatosis|Precancerous Skin Lesion|precancerous dermatosis

    a pathologic process that arises from the skin and has the potential to evolve into a malignant neoplasm. representative examples include actinic keratosis and dysplastic nevus.

  • Large Skin Lesions of Variable Size

    the presence of skin lesions that are large and vary in size.

Patient EducationClinical

Skin Conditions

Your skin is your body's largest organ. It covers the entire outside of your body. There are many ways that your skin protects your body and helps keep you healthy. For example, it:

The full article covers:

  • What does your skin do?
  • What problems and conditions can affect your skin?
  • How can I keep my skin healthy?

Read the full article at MedlinePlus

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

Convert L98.9 to ICD-9-CMHistory

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

ICD-9-CM
709.9 Skin disorder NOS
Approximate The match is approximate rather than exact.

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 L98.9Overview

Is L98.9 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disorder of the skin and subcutaneous tissue, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L98.9 group to?

When disorder of the skin and subcutaneous tissue, unspecified 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 L98.9?

Under the General Equivalence Mappings, disorder of the skin and subcutaneous tissue, unspecified converts to ICD-9-CM 709.9 (skin disorder NOS). The mapping is approximate, so confirm the match fits the documentation.

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.