2021 ICD-10-CM Code L91

Hypertrophic disorders of skin

Version 2021

Not Valid for Submission

L91 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of hypertrophic disorders of skin. The code is not specific and is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

ICD-10:L91
Short Description:Hypertrophic disorders of skin
Long Description:Hypertrophic disorders of skin

Code Classification

Specific Coding for Hypertrophic disorders of skin

Non-specific codes like L91 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for hypertrophic disorders of skin:

  • BILLABLE CODE - Use L91.0 for Hypertrophic scar
  • BILLABLE CODE - Use L91.8 for Other hypertrophic disorders of the skin
  • BILLABLE CODE - Use L91.9 for Hypertrophic disorder of the skin, unspecified

Information for Patients


Skin Conditions

Also called: Cutaneous disorders, Dermatologic disorders

Your skin is your body's largest organ. It covers and protects your body. Your skin

Anything that irritates, clogs, or inflames your skin can cause symptoms such as redness, swelling, burning, and itching. Allergies, irritants, your genetic makeup, and certain diseases and immune system problems can cause rashes, hives, and other skin conditions. Many skin problems, such as acne, also affect your appearance.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)