ICD-10-CM 2027
ICD-10 code for nephrosonephritis
From the official ICD-10-CM alphabetic index entry “Nephrosonephritis, hemorrhagic (endemic)”. Page updated September 29, 2026.
About coding nephrosonephritis
The ICD-10-CM code for nephrosonephritis is A98.5 (Hemorrhagic fever with renal syndrome).
Within A98 (other viral hemorrhagic fevers, not elsewhere classified), A98.5 is specifically for hemorrhagic fever with renal syndrome. Related codes cover Crimean-Congo hemorrhagic fever (A98.0), Omsk hemorrhagic fever (A98.1), Kyasanur Forest disease (A98.2), Marburg virus disease (A98.3), Ebola virus disease (A98.4) and other specified viral hemorrhagic fevers (A98.8).
Don't report A98.5 together with the conditions in its Excludes1 note: hantavirus (cardio)-pulmonary syndrome (B33.4).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
Don't confuse with (Excludes1 for A98.5)
- hantavirus (cardio)-pulmonary syndrome (B33.4)
Common questions about nephrosonephritis ICD-10 codes
What is the ICD-10 code for nephrosonephritis?
- A98.5 — Hemorrhagic fever with renal syndrome.
Is A98.5 billable?
- Yes. A98.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A98.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A98.5 as a principal diagnosis.
Is A98.5 a CC or MCC?
- A98.5 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.