Non-Billable / Non-Specific Code
ICD-10-CM L91 is the diagnosis code for Hypertrophic disorders of skin. 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 non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. 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 sits in the ICD-10-CM classification helps ensure proper coding:
No, L91 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
L91 is the ICD-10-CM diagnosis code for "Hypertrophic disorders of skin". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
L91 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 has 3 sub-code(s) that provide more specific detail: L91.0, L91.8, L91.9.
Use L91 when the patients documented diagnosis matches "Hypertrophic disorders of skin" 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 disorders of skin is L91.
No, L91 is non-billable. Use a more specific sub-code for primary diagnosis billing.
L91 is in Chapter 12 of the ICD-10-CM Tabular List.
Yes, L91 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.