FY2027
MenuClose
Excludes1 pair

L53.0 vs P83.1

L53.0 and P83.1 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.

The official note, declared on L53.0
neonatal erythema toxicum (P83.1)
L53.0

Toxic erythema

Billable
Chapter 12
Diseases of the skin and subcutaneous tissue
Section
L49-L54
Indexed under
  • Erythema, erythematous › toxic, toxicum NEC
  • Eruption › skin › toxic NEC
  • Erythema, erythematous › due to › chemical NEC
P83.1

Neonatal erythema toxicum

Billable
Chapter 16
Certain conditions originating in the perinatal period
Section
P80-P83
Indexed under
  • Erythema, erythematous › neonatorum › toxic
  • Erythema, erythematous › toxic, toxicum NEC › newborn

These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.

Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027