ICD10BillableValid for clinical use
ICD-10 Code L99: Other disorders of skin and subcutaneous tissue in diseases classified elsewhere
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the skin and subcutaneous tissue (L00-L99).
When is it used?
- May be used when a clinician documents other disorders of skin and subcutaneous tissue in diseases classified elsewhere in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
12Diseases of the skin and subcutaneous tissue (L00-L99)
block
L80-L99Other disorders of the skin and subcutaneous tissue
currentL80-L99
Official coding notes
Applicable to
- underlying disease, such as:
- amyloidosis (E85.-)
Excludes1 (do not code together)
- skin disorders in diabetes (E08-E13 with .62-)
- skin disorders in gonorrhea (A54.89)
- skin disorders in syphilis (A51.31, A52.79)
Code first
- underlying disease, such as:
- amyloidosis (E85.-)
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
Dermatologist
Related codes
L80VitiligocodeL81Other disorders of pigmentationcategoryL82Seborrheic keratosiscategoryL83Acanthosis nigricanscodeL84Corns and callositiescodeL85Other epidermal thickeningcategoryL86Keratoderma in diseases classified elsewherecodeL87Transepidermal elimination disorderscategoryL88Pyoderma gangrenosumcodeL89Pressure ulcercategoryL90Atrophic disorders of skincategoryL91Hypertrophic disorders of skincategory
Sibling codes
L80VitiligobillableL81Other disorders of pigmentationL82Seborrheic keratosisL83Acanthosis nigricansbillableL84Corns and callositiesbillableL85Other epidermal thickeningL86Keratoderma in diseases classified elsewherebillableL87Transepidermal elimination disordersL88Pyoderma gangrenosumbillableL89Pressure ulcerL90Atrophic disorders of skinL91Hypertrophic disorders of skinL92Granulomatous disorders of skin and subcutaneous tissueL93Lupus erythematosusL94Other localized connective tissue disordersL95Vasculitis limited to skin, not elsewhere classifiedL97Non-pressure chronic ulcer of lower limb, not elsewhere classifiedL98Other disorders of skin and subcutaneous tissue, not elsewhere classified
Coverage-related procedures and services
CPT 15820high
BLEPHAROPLASTY, LOWER EYELID;
Source: CMS coverage guidance
CPT 15821high
BLEPHAROPLASTY, LOWER EYELID; WITH EXTENSIVE HERNIATED FAT PAD
Source: CMS coverage guidance
CPT 15822high
BLEPHAROPLASTY, UPPER EYELID;
Source: CMS coverage guidance
CPT 15823high
BLEPHAROPLASTY, UPPER EYELID; WITH EXCESSIVE SKIN WEIGHTING DOWN LID
Source: CMS coverage guidance
CPT 17111high
DESTRUCTION (EG, LASER SURGERY, ELECTROSURGERY, CRYOSURGERY, CHEMOSURGERY, SURGICAL CURETTEMENT), OF BENIGN LESIONS OTHER THAN SKIN TAGS OR CUTANEOUS VASCULAR PROLIFERATIVE LESIONS; 15 OR MORE LESIONS
Source: CMS coverage guidance
CPT 17110high
DESTRUCTION (EG, LASER SURGERY, ELECTROSURGERY, CRYOSURGERY, CHEMOSURGERY, SURGICAL CURETTEMENT), OF BENIGN LESIONS OTHER THAN SKIN TAGS OR CUTANEOUS VASCULAR PROLIFERATIVE LESIONS; UP TO 14 LESIONS
Source: CMS coverage guidance
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
L99
Common synonyms
Other disorders of skin and subcutaneous tissue in diseases classified elsewhere
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.