ICD-10 Code B51.0 – Plasmodium vivax malaria with rupture of spleen (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B51.0 – Plasmodium vivax malaria with rupture of spleen
What it is
B51.0 identifies malaria caused by Plasmodium vivax when the infection is complicated by rupture of the spleen. Use it for documented splenic rupture linked to vivax malaria.
Clinical signs
Typical findings include acute malaria symptoms with left upper quadrant pain, abdominal tenderness, or signs of internal bleeding. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly states Plasmodium vivax malaria and a ruptured spleen are both present. It applies when the rupture is described as a complication of the malaria infection. If the cause is unclear, check documentation before assigning B51.0.
Do not use for
Do not use B51.0 for malaria without splenic rupture, or for splenic rupture from trauma or another disease. Do not assume vivax malaria if the species is not documented.
Coding tip
Confirm both the parasite species and the splenic rupture linkage in the chart before coding.