Alphabetic Index FY2027

A40

Streptococcal sepsis

FY2027Chapter 1: Certain infectious and parasitic diseases/A30–A49 Other bacterial diseases

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

A40 is a non-billable ICD-10-CM code category for streptococcal sepsis. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are A40.0 Sepsis due to streptococcus, group A; A40.1 Sepsis due to streptococcus, group B; A40.3 Sepsis due to Streptococcus pneumoniae; A40.8 Other streptococcal sepsis and 1 more. Its coding notes include a Code first instruction, a Use additional code instruction, 3 Excludes1 entries and 5 Excludes2 entries.

Guidelines tip

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

Sepsis is coded to the underlying systemic infection, with A41.9 as the default. Urosepsis has no default code and the provider must be queried. R65.2 needs documented severe sepsis or associated organ dysfunction.

Guidelines I.C.1.d.1.aSepsis, severe sepsis and urosepsisRead the official text

Code first

If the underlying condition listed here is present and known, sequence it first.

This code
  • , 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-)

Use additional code

Add the listed code as a secondary code, if known.

Also from chapter/block level (1 note)
Inherited from Chapter 1 Certain infectious and parasitic diseases
  • code to identify resistance to antimicrobial drugs (Z16.-)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (5 notes)
Inherited from Chapter 1 Certain infectious and parasitic diseases
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Includes

Further defines or gives examples of the content of the category.

Also from chapter/block level (1 note)
Inherited from Chapter 1 Certain infectious and parasitic diseases
  • diseases generally recognized as communicable or transmissible

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 2 entries

More specific codes under A40 5