Billable / Specific Code
ICD-10-CM L91.9 is the diagnosis code for Hypertrophic disorder of the skin, unspecified. 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.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where L91.9 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, L91.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
L91.9 is the ICD-10-CM diagnosis code for "Hypertrophic disorder of the skin, unspecified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of L91.9 is L91 ("Hypertrophic disorders of skin"). L91.9 provides a more specific classification within this category.
L91.9 is located in Section L80-L99 — "Other disorders of the skin and subcutaneous tissue" within Chapter 12 of the ICD-10-CM Tabular List.
L91.9 has 1918 sub-code(s) that provide more specific detail: A00, A01, A02, A03, A04 and more.
Use L91.9 when the patients documented diagnosis matches "Hypertrophic disorder of the skin, unspecified" 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 Hypertrophic disorder of the skin, unspecified is L91.9.
Yes, L91.9 can be used as a primary diagnosis code since it is billable and specific.
L91.9 is in Chapter 12 of the ICD-10-CM Tabular List.
Yes, L91.9 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.