L53.0
Toxic erythema
L53.0 (also written L530) is a billable ICD-10-CM diagnosis code for toxic erythema. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 6 codes in category L53 (Other erythematous conditions). The Alphabetic Index lists it under 3 entries. Its coding notes include a Code first instruction, a Use additional code instruction, 6 Excludes1 entries and 10 Excludes2 entries.
Code first
If the underlying condition listed here is present and known, sequence it first.
- poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4)
Use additional code
Add the listed code as a secondary code, if known.
- code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Excludes1
Not coded here. The listed conditions generally should not be reported together.
- neonatal erythema toxicum (P83.1)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (10 notes)
- 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.-)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Other clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026Hospital CC
Counts as a complication or comorbidity (CC) when reported as a secondary diagnosis on an inpatient claim. It does not count when the principal diagnosis is one of the 27 codes in its exclusion list. Some MS-DRGs also ignore a CC or MCC that defines the DRG.
Source: CMS MS-DRG Definitions Manual v44, effective October 1, 2026, Appendix CAlphabetic Index terms
Terms the official Alphabetic Index lists for this code. 3 entries