ICD10BillableValid for clinical use
ICD-10 Code L98.5: Mucinosis of the skin
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 mucinosis of the skin 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
category
L98Other disorders of skin and subcutaneous tissue, not elsewhere classified
currentL98
Official coding notes
Inclusion terms
- Focal mucinosis
- Lichen myxedematosus
- Reticular erythematous mucinosis
Excludes1 (do not code together)
- focal oral mucinosis (K13.79)
- myxedema (E03.9)
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
L98.0Pyogenic granulomacodeL98.1Factitial dermatitiscodeL98.2Febrile neutrophilic dermatosis [Sweet]codeL98.3Eosinophilic cellulitis [Wells]codeL98.4Non-pressure chronic ulcer of skin, not elsewhere classifiedcategoryL98.ANon-pressure chronic ulcer of upper limb, not elsewhere classifiedcategoryL98.6Other infiltrative disorders of the skin and subcutaneous tissuecodeL98.7Excessive and redundant skin and subcutaneous tissuecodeL98.8Other specified disorders of the skin and subcutaneous tissuecodeL98.9Disorder of the skin and subcutaneous tissue, unspecifiedcode
Sibling codes
L98.0Pyogenic granulomabillableL98.1Factitial dermatitisbillableL98.2Febrile neutrophilic dermatosis [Sweet]billableL98.3Eosinophilic cellulitis [Wells]billableL98.4Non-pressure chronic ulcer of skin, not elsewhere classifiedL98.ANon-pressure chronic ulcer of upper limb, not elsewhere classifiedL98.6Other infiltrative disorders of the skin and subcutaneous tissuebillableL98.7Excessive and redundant skin and subcutaneous tissuebillableL98.8Other specified disorders of the skin and subcutaneous tissuebillableL98.9Disorder of the skin and subcutaneous tissue, unspecifiedbillable
Coverage-related procedures and services
HCPCS J1554high
INJECTION, IMMUNE GLOBULIN (ASCENIV), 500 MG
Source: CMS coverage guidance
HCPCS J1556high
INJECTION, IMMUNE GLOBULIN (BIVIGAM), 500 MG
Source: CMS coverage guidance
HCPCS J1576high
INJECTION, IMMUNE GLOBULIN (PANZYGA), INTRAVENOUS, NON-LYOPHILIZED (E.G., LIQUID), 500 MG
Source: CMS coverage guidance
HCPCS J1459high
INJECTION, IMMUNE GLOBULIN (PRIVIGEN), INTRAVENOUS, NON-LYOPHILIZED (E.G., LIQUID), 500 MG
Source: CMS coverage guidance
HCPCS J1569high
INJECTION, IMMUNE GLOBULIN, (GAMMAGARD LIQUID), NON-LYOPHILIZED, (E.G., LIQUID), 500 MG
Source: CMS coverage guidance
HCPCS J1557high
INJECTION, IMMUNE GLOBULIN, (GAMMAPLEX), INTRAVENOUS, NON-LYOPHILIZED (E.G., LIQUID), 500 MG
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 238949006high
Acral persistent papular mucinosis
Source: SNOMED International ICD-10 map
SNOMED_CT 725148000high
Atypical lichen myxedematosus
Source: SNOMED International ICD-10 map
SNOMED_CT 238945000high
Diffuse cutaneous mucinosis
Source: SNOMED International ICD-10 map
SNOMED_CT 717258005high
Discrete papular lichen myxedematosus
Source: SNOMED International ICD-10 map
SNOMED_CT 110981005high
Focal cutaneous mucinosis
Source: SNOMED International ICD-10 map
SNOMED_CT 402722008high
Focal primary mucinosis of skin
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
L98.5
Common synonyms
Mucinosis of the skin
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.