ICD10BillableValid for clinical use
ICD-10 Code L13.9: Bullous disorder, unspecified
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 bullous disorder, unspecified 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
L10-L14Bullous disorders
category
L13Other bullous disorders
currentL13
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
Sibling codes
Mapped diagnoses and classifications
SNOMED_CT 403174006high
Blistering of skin induced by prolonged pressure
Source: SNOMED International ICD-10 map
SNOMED_CT 7231009high
Bullous dermatosis
Source: SNOMED International ICD-10 map
SNOMED_CT 402750008high
Bullous dermatosis precipitated by drug treatment
Source: SNOMED International ICD-10 map
SNOMED_CT 109250009high
Chronic bullous dermatosis of childhood
Source: SNOMED International ICD-10 map
SNOMED_CT 403294009high
Nail dystrophy associated with bullous dermatoses
Source: SNOMED International ICD-10 map
SNOMED_CT 736120001high
Nontraumatic blister of skin
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
L13.9
Common synonyms
Bullous disorder, unspecifiedBullous disorder
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.