ICD-10-CM 2027
ICD-10 code for sepsis congenital newborn
Bacterial sepsis of newborn, unspecified
From the official ICD-10-CM alphabetic index entry “Newborn (infant) (liveborn) (singleton) › sepsis (congenital)”. Page updated September 29, 2026.
About coding sepsis congenital newborn
The ICD-10-CM code for sepsis congenital newborn is P36.9 (Bacterial sepsis of newborn, unspecified). The official index lists 9 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on P36.9.
Within P36, choose P36.9 (unspecified) only when documentation doesn't support a more specific option: sepsis of newborn due to streptococcus, group B (P36.0), sepsis of newborn due to other and unspecified streptococci (P36.1), sepsis of newborn due to Staphylococcus aureus (P36.2), sepsis of newborn due to other and unspecified staphylococci (P36.3), sepsis of newborn due to Escherichia coli (P36.4), sepsis of newborn due to anaerobes (P36.5) and other bacterial sepsis of newborn (P36.8).
Use an additional code(s), if applicable, to identify severe sepsis (R65.2-) and associated acute organ dysfunction(s).
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.
More specific sepsis congenital newborn codes (official index)
- due to
- anaerobes NEC P36.5 — Sepsis of newborn due to anaerobes
- Escherichia coli P36.4 — Sepsis of newborn due to Escherichia coli
- Staphylococcus P36.30 — Sepsis of newborn due to unspecified staphylococci
- aureus P36.2 — Sepsis of newborn due to Staphylococcus aureus
- specified NEC P36.39 — Sepsis of newborn due to other staphylococci
- Streptococcus P36.10 — Sepsis of newborn due to unspecified streptococci
- group B P36.0 — Sepsis of newborn due to streptococcus, group B
- specified NEC P36.19 — Sepsis of newborn due to other streptococci
- specified NEC P36.8 — Other bacterial sepsis of newborn
Common questions about sepsis congenital newborn ICD-10 codes
What is the ICD-10 code for sepsis congenital newborn?
- P36.9 — Bacterial sepsis of newborn, unspecified. More specific codes apply when the documentation supports them: P36.5, P36.4, P36.30, P36.2 and others below.
Is P36.9 billable?
- Yes. P36.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P36.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P36.9 as a principal diagnosis.
Is P36.9 a CC or MCC?
- P36.9 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.