A41 - Other sepsis
A41.5 - Sepsis due to other Gram-negative organisms
A41.50 - Gram-negative sepsis, unspecified
A41.51 - Sepsis due to Escherichia coli [E. coli]
A41.52 - Sepsis due to Pseudomonas
A41.53 - Sepsis due to Serratia
A41.59 - Other Gram-negative sepsis