2025 ICD-10-CM Diagnosis Code L52
Erythema nodosum
- ICD-10-CM Code:
- L52
- ICD-10 Code for:
- Erythema nodosum
- Is Billable?
- Yes - Valid for Submission
- Chronic Condition Indicator: [1]
- Not chronic
- Code Navigator:
L52 is a billable diagnosis code used to specify a medical diagnosis of erythema nodosum. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2024 through September 30, 2025.
Approximate Synonyms
The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.
- Acne fulminans
- Acne fulminans with erythema nodosum
- Acute erythema nodosum
- Acute panniculitis
- Chronic erythema nodosum
- Chronic migratory panniculitis
- Drug-induced panniculitis
- Erythema induratum
- Erythema nodosum
- Erythema nodosum caused by drug
- Erythema nodosum due to bacterial infection
- Erythema nodosum due to bacterial infection
- Erythema nodosum due to bacterial infection
- Erythema nodosum due to bacterial infection
- Erythema nodosum due to coccidioidomycosis
- Erythema nodosum due to streptococcal infection
- Erythema nodosum due to systemic fungal infection
- Erythema nodosum due to Yersinia enterocolitica
- Erythema nodosum due to yersiniosis
- Erythema nodosum due to yersiniosis
- Erythema nodosum migrans
- Lobular panniculitis
- Sarcoidosis-induced erythema nodosum
Clinical Classification
Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.
They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.
Other specified inflammatory condition of skin
CCSR Code: SKN002
Inpatient Default: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.
Outpatient Default: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.
Clinical Information
Erythema Nodosum
an erythematous eruption commonly associated with drug reactions or infection and characterized by inflammatory nodules that are usually tender, multiple, and bilateral. these nodules are located predominantly on the shins with less common occurrence on the thighs and forearms. they undergo characteristic color changes ending in temporary bruise-like areas. this condition usually subsides in 3-6 weeks without scarring or atrophy.Erythema Induratum
a type of panniculitis characterized histologically by the presence of granulomas, vasculitis, and necrosis. it is traditionally considered to be the tuberculous counterpart of nodular vasculitis, but is now known to occur without tuberculous precedent. it is seen most commonly in adolescent and menopausal women, is initiated or exacerbated by cold weather, and typically presents as one or more recurrent erythrocyanotic nodules or plaques on the calves. the nodules may progress to form indurations, ulcerations, and scars.
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.
Type 1 Excludes
Type 1 ExcludesA 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.
- tuberculous erythema nodosum A18.4
Index to Diseases and Injuries References
The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).
- - Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) - M19.90
- - Arthropathy - See Also: Arthritis; - M12.9
- - Dermatitis (eczematous) - L30.9
- - contusiformis - L52
- - Erythema, erythematous (infectional) (inflammation) - L53.9
- - induratum (nontuberculous) - L52
- - nodosum - L52
Convert L52 to ICD-9-CM
Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.
Erythema nodosum
ICD-9-CM: 695.2
This is a direct match with no additional mapping qualifiers. The absence of a flag generally means the mapping is considered exact or precise. In other words, the ICD-10 code maps cleanly to the ICD-9 code without qualification, approximation, or needing multiple codes.
Patient Education
Skin Conditions
What does your skin do?
Your skin is your body's largest organ. It covers the entire outside of your body. There are many ways that your skin protects your body and helps keep you healthy. For example, it:
- Holds body fluids in, which helps prevent you from getting dehydrated
- Keeps out harmful germs, which helps prevent infections
- Helps you feel things like heat, cold, and pain
- Helps control your body temperature
- Makes vitamin D when the sun shines on it
- Shields your body against heat and light
What problems and conditions can affect your skin?
There are many different problems and conditions which can affect your skin. Some of them can cause uncomfortable symptoms, such as itching, burning, redness, and rashes. They might also affect your appearance. Some of the more common skin conditions include:
- Acne, which causes pimples when hair follicles under your skin get clogged up
- Burns
- Cuts and scrapes
- Dandruff, flaking of the skin on your scalp (the top of your head)
- Eczema (atopic dermatitis), which causes inflammation, redness, and irritation of the skin
- Hives, which are red and sometimes itchy bumps on your skin
- Insect bites
- Psoriasis, which causes itchy, scaly red patches
- Skin cancer
- Skin infections
How can I keep my skin healthy?
Since your skin protects your body in many ways, it's important to try to keep your skin healthy. For example, you can:
- Wear the right protective equipment, like gloves, long sleeves, knee and elbow pads, or helmets to protect against cuts, bumps and scrapes.
- If you do get a cut or scrape, clean it right away with soap and warm water. Put on a bandage to protect it while it heals.
- When you are spending time outdoors, wear long sleeves and pants and use insect repellant to prevent insect bites.
- Prevent sunburn by covering up and using sunscreen when outdoors.
- Wash your hands often with soap and water.
- When you take a shower or bath, use warm (not hot) water. Use mild cleansers and wash gently (don't scrub).
- Use moisturizers, like lotions, creams, or ointments, to prevent dry skin.
NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases
[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.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.