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  6. 2025 ICD-10-CM Code L04

2025 ICD-10-CM Diagnosis Code L04

Acute lymphadenitis

ICD-10-CM Code:
L04
ICD-10 Code for:
Acute lymphadenitis
Is Billable?
Not Valid for Submission
Code Navigator:

L04 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of acute lymphadenitis. The code is not specific and is NOT valid for the year 2025 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.

Specific Coding Applicable to Acute lymphadenitis

Non-specific codes like L04 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for acute lymphadenitis:

  • Use L04.0 for Acute lymphadenitis of face, head and neck - BILLABLE CODE

  • Use L04.1 for Acute lymphadenitis of trunk - BILLABLE CODE

  • Use L04.2 for Acute lymphadenitis of upper limb - BILLABLE CODE

  • Use L04.3 for Acute lymphadenitis of lower limb - BILLABLE CODE

  • Use L04.8 for Acute lymphadenitis of other sites - BILLABLE CODE

  • Use L04.9 for Acute lymphadenitis, unspecified - BILLABLE CODE

Code Classification

  • Diseases of the skin and subcutaneous tissue
    L00–L99
    • Infections of the skin and subcutaneous tissue
      L00-L08
      • Acute lymphadenitis
        L04

Clinical Information

  • Acute Lymphadenitis

    acute inflammation of the lymph nodes.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Includes

Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • abscess (acute) of lymph nodes, except mesenteric
  • acute lymphadenitis, except mesenteric

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • chronic or subacute lymphadenitis, except mesenteric I88.1
  • enlarged lymph nodes R59
  • human immunodeficiency virus HIV disease resulting in generalized lymphadenopathy B20
  • lymphadenitis NOS I88.9
  • nonspecific mesenteric lymphadenitis I88.0

Patient Education


Lymphatic Diseases

The lymphatic system is a network of tissues and organs. It is made up of:

  • Lymph - a fluid that contains white blood cells that defend against germs
  • Lymph vessels - vessels that carry lymph throughout your body. They are different from blood vessels.
  • Lymph nodes - glands found throughout the lymph vessels. Along with your spleen, these nodes are where white blood cells fight infection.

Your bone marrow and thymus produce the cells in lymph. They are part of the system, too.

The lymphatic system clears away infection and keeps your body fluids in balance. If it's not working properly, fluid builds in your tissues and causes swelling, called lymphedema. Other lymphatic system problems can include infections, blockage, and cancer.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.