ICD-10 Code A40 – Streptococcal Sepsis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A40 – Streptococcal sepsis
What it is
A40 identifies sepsis caused by Streptococcus species. Use it when the record documents a streptococcal bloodstream infection with systemic illness.
Clinical signs
Clinical features vary; refer to documentation. Typical sepsis findings may include fever, chills, tachycardia, hypotension, or altered mental status, along with evidence of Streptococcus infection.
When to use this code
Use A40 when the provider clearly documents streptococcal sepsis, streptococcal septicemia, or sepsis due to Streptococcus. Confirm the organism is stated or linked to the sepsis diagnosis. If the note only says infection without sepsis, do not assign A40.
Do not use for
Do not use this code for localized streptococcal infections without sepsis, or when the organism is not identified. Check documentation if the record uses “bacteremia” alone or another cause of sepsis.
Coding tip
Code the documented Streptococcus cause and review the note for any additional sepsis-related organ dysfunction or associated infection codes.