ICD-10-CM 2027
ICD-10 code for Haemophilus influenzae sepsis
From the official ICD-10-CM alphabetic index entry “Sepsis (generalized) (unspecified organism) › Haemophilus influenzae”. Page updated September 29, 2026.
About coding Haemophilus influenzae sepsis
The ICD-10-CM code for Haemophilus influenzae sepsis is A41.3 (Sepsis due to Hemophilus influenzae).
Within A41 (other sepsis), A41.3 is specifically for sepsis due to Hemophilus influenzae. Related codes cover sepsis due to Staphylococcus aureus (A41.0), sepsis due to other specified staphylococcus (A41.1), sepsis due to unspecified staphylococcus (A41.2), sepsis due to anaerobes (A41.4), sepsis due to other Gram-negative organisms (A41.5), other specified sepsis (A41.8) and sepsis, unspecified organism (A41.9).
Code first: , if applicable, postprocedural sepsis (T81.44-), sepsis due to central venous catheter (T80.211-), sepsis during labor (O75.3), sepsis following abortion, ectopic or molar pregnancy (O03.37, O03.87, O04.87, O07.37, O08.82) and 2 more.
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about Haemophilus influenzae sepsis ICD-10 codes
What is the ICD-10 code for Haemophilus influenzae sepsis?
- A41.3 — Sepsis due to Hemophilus influenzae.
Is A41.3 billable?
- Yes. A41.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A41.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A41.3 as a principal diagnosis.
Is A41.3 a CC or MCC?
- A41.3 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.