Erythema nodosum
In Urticaria and erythema (L49-L54), chapter 12: Diseases of the Skin and Subcutaneous Tissue
- L52 is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under L49-L54 below.
- As a secondary diagnosis it is not a CC or MCC, so it doesn't raise the MS-DRG payment.
- Doesn't count toward a Medicare Advantage risk score (no HCC in V28).
- AHRQ's Chronic Condition Indicator classes it as not chronic (an acute or short-term condition).
Also indexed as: Arthritis, due to or associated with, erythema, nodosum; Arthritis, in, erythema, nodosum; Arthropathy, in, erythema, nodosum; Dermatitis, contusiformis; Erythema, induratum; Erythema, nodosum
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Instructional notes
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers assigning pressure ulcer codes by site and stage, including unstageable, healing, healed, and progressing ulcers, and coding healing or progressing non-pressure chronic ulcers.
- Pressure ulcer stage codes (page 58)
- Non-Pressure Chronic Ulcers (page 60)
Other codes under L49-L54
Urticaria and erythema (L49-L54)
L52 MS-DRGs
As the principal diagnosis, L52 groups to MS-DRG 595 or 596 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Related conditions
Grouped by AHRQ's Clinical Classifications Software Refined (CCSR), which sorts every diagnosis code into clinically meaningful categories.
L52 is in Other specified inflammatory condition of skin (SKN002, its default category), with 164 codes. Others in it:
- B65.3 Cercarial dermatitis
- E08.620 Diabetes mellitus due to underlying condition with diabetic dermatitis
- E09.620 Drug or chemical induced diabetes mellitus with diabetic dermatitis
- E10.620 Type 1 diabetes mellitus with diabetic dermatitis
- E11.620 Type 2 diabetes mellitus with diabetic dermatitis
- E13.620 Other specified diabetes mellitus with diabetic dermatitis
- L10.0 Pemphigus vulgaris
- L10.1 Pemphigus vegetans
Other codes that refer to L52
Notes on these codes point to L52.
- M14.8 Code First: erythema nodosum (L52)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
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:
Read more about skin conditions on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.
ICD-9-CM equivalent
Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).
- 695.2 Erythema nodosum