2022 ICD-10-CM Code L13.9

Bullous disorder, unspecified

Version 2021

Valid for Submission

ICD-10:L13.9
Short Description:Bullous disorder, unspecified
Long Description:Bullous disorder, unspecified

Code Classification

  • Diseases of the skin and subcutaneous tissue (L00–L99)
    • Bullous disorders (L10-L14)
      • Other bullous disorders (L13)

L13.9 is a billable diagnosis code used to specify a medical diagnosis of bullous disorder, unspecified. The code L13.9 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.

The ICD-10-CM code L13.9 might also be used to specify conditions or terms like bullous dermatosis, bullous eruption, bullous eruption of hand, bullous eruption of pharynx, bullous insect bite reaction , bullous wheal, etc.

Unspecified diagnosis codes like L13.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code L13.9 are found in the index:

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Convert L13.9 to ICD-9 Code

Information for Patients


Skin Conditions

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


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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)