1. ICD-10-CM Codes
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2. L00-L99
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3. L00-L08
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4. L03-
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5. 2023 ICD-10-CM Diagnosis Code L03.90

2023 ICD-10-CM Diagnosis Code L03.90

Cellulitis, unspecified

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• L03.90 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM L03.90 became effective on October 1, 2022.
• This is the American ICD-10-CM version of L03.90 - other international versions of ICD-10 L03.90 may differ.

• Cellulitis
• Cellulitis of skin with lymphangitis

• A bacterial infection that affects and spreads in the skin and soft tissues. Signs and symptoms include pain, tenderness and reddening in the affected area, fever, chills, and lymphadenopathy.
• An acute, diffuse, and suppurative inflammation of loose connective tissue, particularly the deep subcutaneous tissues, and sometimes muscle, which is most commonly seen as a result of infection of a wound, ulcer, or other skin lesions.
• An acute, spreading infection of the deep tissues of the skin and muscle that causes the skin to become warm and tender and may also cause fever, chills, swollen lymph nodes, and blisters.
• Cellulitis is a bacterial infection of the deepest layer of your skin. Bacteria can enter your body through a break in the skin - from a cut, scratch, or bite. Usually if your skin gets infected, it's just the top layer and it goes away on its own with proper care. But with cellulitis, the deep skin tissues in the infected area become red, hot, irritated and painful. Cellulitis is most common on the face and lower legs. You may have cellulitis if you notice
  • area of skin redness or swelling that gets larger
  • tight, glossy look to skin
  • pain or tenderness
  • skin rash that happens suddenly and grows quickly
  • signs of infection including fever, chills and muscle aches
  cellulitis can be serious, and possibly even deadly, so prompt treatment is important. The goal of treatment is to control infection and prevent related problems. Treatment usually includes antibiotics.
• Inflammation that may involve the skin and or subcutaneous tissues, and or muscle

• 573 Skin graft for skin ulcer or cellulitis with mcc
• 574 Skin graft for skin ulcer or cellulitis with cc
• 575 Skin graft for skin ulcer or cellulitis without cc/mcc
• 602 Cellulitis with mcc
• 603 Cellulitis without mcc
• 791 Prematurity with major problems
• 793 Full term neonate with major problems

Convert L03.90 to ICD-9-CM

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change

• Cellulitis (diffuse) (phlegmonous) (septic) (suppurative) L03.90
  • chronic L03.90
  • multiple sites, so stated L03.90

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.