ICD-10-CM 2027
ICD-10 code for Mucinosis
From the official ICD-10-CM alphabetic index entry “Mucinosis (cutaneous) (focal) (papular) (reticular erythematous) (skin)”. Page updated September 29, 2026.
About coding Mucinosis
The ICD-10-CM code for Mucinosis is L98.5 (Mucinosis of the skin). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on L98.5.
Within L98 (other disorders of skin and subcutaneous tissue, not elsewhere classified), L98.5 is specifically for Mucinosis of the skin. Related codes cover pyogenic granuloma (L98.0), Factitial dermatitis (L98.1), febrile neutrophilic dermatosis [Sweet] (L98.2), eosinophilic cellulitis [Wells] (L98.3), Non-pressure chronic ulcer of skin, not elsewhere classified (L98.4), other infiltrative disorders of the skin and subcutaneous tissue (L98.6), excessive and redundant skin and subcutaneous tissue (L98.7), other specified disorders of the skin and subcutaneous tissue (L98.8) and 2 more.
Don't report L98.5 together with the conditions in its Excludes1 note: focal oral mucinosis (K13.79) and myxedema (E03.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific Mucinosis codes (official index)
- oral K13.79 — Other lesions of oral mucosa
Don't confuse with (Excludes1 for L98.5)
Common questions about Mucinosis ICD-10 codes
What is the ICD-10 code for Mucinosis?
- L98.5 — Mucinosis of the skin. More specific codes apply when the documentation supports them: K13.79.
What is the ICD-10 code for oral mucinosis?
- K13.79 — Other lesions of oral mucosa.
Is L98.5 billable?
- Yes. L98.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L98.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L98.5 as a principal diagnosis.
Is L98.5 a CC or MCC?
- No. L98.5 is neither a CC nor an MCC under MS-DRG v44.0.