Billable / Specific Code
ICD-10-CM L99 is the diagnosis code for Other disorders of skin and subcutaneous tissue in diseases classified elsewhere. This code falls under the section "Other disorders of the skin and subcutaneous tissue" within Chapter 12 — Diseases of the skin and subcutaneous tissue (L00-L99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as L99. They are mutually exclusive:
Understanding where L99 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, L99 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
L99 is the ICD-10-CM diagnosis code for "Other disorders of skin and subcutaneous tissue in diseases classified elsewhere". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
L99 is located in Section L80-L99 — "Other disorders of the skin and subcutaneous tissue" within Chapter 12 of the ICD-10-CM Tabular List.
Use L99 when the patients documented diagnosis matches "Other disorders of skin and subcutaneous tissue in diseases classified elsewhere" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Other disorders of skin and subcutaneous tissue in diseases classified elsewhere is L99.
Yes, L99 can be used as a primary diagnosis code since it is billable and specific.
L99 is in Chapter 12 of the ICD-10-CM Tabular List.
Type 1 Excludes for L99 include: skin disorders in diabetes (E08-E13 with .62-); skin disorders in gonorrhea (A54.89); skin disorders in syphilis (A51.31, A52.79).
Yes, L99 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.