2026 ICD-10-CM Diagnosis Code A39Meningococcal infection

ICD-10-CM Codes›A00–B99›A30-A49›A39

ICD-10-CM A39
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A39 is a non-billable ICD-10-CM category code for meningococcal infection, so it cannot be submitted on claims. Use a more specific code from this category instead, such as A39.0, A39.1, A39.2, and A39.3.

Code Identity

ICD-10-CM Code
A39
Billable Status
No — Non-Billable Category
Code Describes
Meningococcal infection
Chapter
A30-A49
Other bacterial diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA30-A49Other bacterial diseases
CategoryA39Meningococcal infection
This CodeA39Meningococcal infection

Specific Coding for Meningococcal infectionOverview

Non-specific codes like A39 require more characters. Use one of these billable codes instead:

  • Use A39.0 for Meningococcal meningitis

  • Use A39.1 for Waterhouse-Friderichsen syndrome

  • Use A39.2 for Acute meningococcemia

  • Use A39.3 for Chronic meningococcemia

  • Use A39.4 for Meningococcemia, unspecified

  • A39.5 for Meningococcal heart disease

  • Use A39.50 for Meningococcal carditis, unspecified

  • Use A39.51 for Meningococcal endocarditis

  • Use A39.52 for Meningococcal myocarditis

  • Use A39.53 for Meningococcal pericarditis

  • A39.8 for Other meningococcal infections

  • Use A39.81 for Meningococcal encephalitis

  • Use A39.82 for Meningococcal retrobulbar neuritis

  • Use A39.83 for Meningococcal arthritis

  • Use A39.84 for Postmeningococcal arthritis

  • Use A39.89 for Other meningococcal infections

  • Use A39.9 for Meningococcal infection, unspecified

Patient EducationClinical

Meningococcal Disease

Meningococcal disease is the name for any illness that is caused by Neisseria meningitidis bacteria (also called meningococcal bacteria). These illnesses are often severe and can sometimes be deadly. They include infections of the lining of the brain and spinal cord (meningitis) and in the bloodstream (sepsis).

The full article covers:

  • What is meningococcal disease?
  • What causes meningococcal disease?
  • Who is more likely to get meningococcal disease?
  • What are the symptoms of meningococcal disease?
  • How is meningococcal disease diagnosed?
  • What are the treatments for meningococcal disease?
  • Can meningococcal disease be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A39Overview

Is A39 (Meningococcal infection) a billable code?

No. This is a category header that groups the codes for meningococcal infection, and headers cannot be submitted on claims. Claims for meningococcal infection need a more specific code from this category, such as A39.0, A39.1, and A39.2.