ICD-11 classes
14 Diseases of the skin
Certain skin disorders attributable to infection or...
Certain skin disorders attributable to bacterial infection
1B20 — Leprosy
1B20.2 — Leprosy reactions
1B20.21 — Type II leprosy reaction

ICD-11 1B20.21 — Type II leprosy reaction

This phenomenon, also named downgrading reaction, occurs in borderline leprosy states and is associated with a decrease in cell-mediated immunity with a shift towards the lepromatous end of the clinical spectrum.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.

The diagnosis is coded elsewhere:

• Leprosy reactions #270