A40 – Streptococcal sepsis

ICD-10-CM 2027 diagnosis code · Other bacterial diseases

Non-billable header

ICD-10-CM code A40

Code: A40 (claims format: A40)
Description: Streptococcal sepsis
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 1. Certain infectious and parasitic diseases (A00-B99)
Block: A30-A49 Other bacterial diseases

Billable codes under A40

A40 is a header code and cannot be used on claims. Choose the most specific code:

A40.0 – Sepsis due to streptococcus, group ABillable
A40.1 – Sepsis due to streptococcus, group BBillable
A40.3 – Sepsis due to Streptococcus pneumoniaeBillable
A40.8 – Other streptococcal sepsisBillable
A40.9 – Streptococcal sepsis, unspecifiedBillable

Notes for A40

Excludes1 (not coded here):

neonatal (P36.0-P36.1)
puerperal sepsis (O85)
sepsis due to Streptococcus, group D (A41.81)

Code first:

, if applicable, postprocedural sepsis (T81.44-)
sepsis due to central venous catheter (T80.211-)
streptococcal sepsis during labor (O75.3)
streptococcal sepsis following abortion or ectopic or molar pregnancy (O03.37, O03.87, O04.87, O07.37, O08.82)
streptococcal sepsis following immunization (T88.0-)
streptococcal sepsis following infusion, transfusion or therapeutic injection (T80.22-, T80.29-)

Index terms for A40

Entries in the ICD-10-CM alphabetic index that lead to this code:

Frequently asked questions

What is ICD-10 code A40?

A40 is the ICD-10-CM code for streptococcal sepsis, in the block A30-A49 (Other bacterial diseases).

Is A40 a billable code?

No. A40 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.