2027 ICD-10-CM Diagnosis Code L52Erythema nodosum

ICD-10-CM Codes›L00–L99›L49-L54›L52

ICD-10-CM L52
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L52 is a billable ICD-10-CM diagnosis code for erythema nodosum. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 595 through 596. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified inflammatory condition of skin.

Code Identity

ICD-10-CM Code
L52
Billable Status
Yes — Valid for Submission
Code Describes
Erythema nodosum
Short Description
Erythema nodosum
Same as the full description in the CMS dataset.
Chapter
L49-L54
Urticaria and erythema

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL49-L54Urticaria and erythema
CategoryL52Erythema nodosum
This CodeL52Erythema nodosum

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • 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 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 migrans
  • Lobular panniculitis
  • Sarcoidosis-induced erythema nodosum

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L52: its own notes plus those printed at block L49-L54 and Chapter 12. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On L52 itself
  • tuberculous erythema nodosum (A18.4)
From Block L49-L54 Urticaria and erythema applies to 33 codes

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue applies to 1,001 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name L52, its category, or a range that includes it.

Code First 1

These codes say to code first a condition named in the note, and L52 is one of the conditions named.

  • M14.8 Arthropathies in other specified diseases classified elsewhere
    erythema nodosum (L52)

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SKN002
Other specified inflammatory condition of skin
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • 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.

Patient EducationClinical

Skin Conditions

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:

The full article covers:

  • What does your skin do?
  • What problems and conditions can affect your skin?
  • How can I keep my skin healthy?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert L52 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
695.2 Erythema nodosum
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About L52Overview

What is the ICD-10 code for erythema nodosum?

The ICD-10-CM code for erythema nodosum is L52. It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is L52 (Erythema nodosum) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report erythema nodosum on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does L52 group to?

When erythema nodosum is the principal diagnosis on an inpatient stay, it groups to MS-DRG 596, 595, with relative weights from 1.1067 to 2.0230 depending on complications. Higher weights mean higher Medicare reimbursement.

Can L52 be reported with A18.4?

Not as a rule. The Excludes1 note on L52 lists "tuberculous erythema nodosum (A18.4)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of L52?

Under the General Equivalence Mappings, erythema nodosum converts to ICD-9-CM 695.2 (erythema nodosum). The mapping is a direct match.