ICD-10 code for meningococcus

The ICD-10-CM code for meningococcus is A39.9 (Meningococcal infection, unspecified). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on A39.9.

Within A39, choose A39.9 (unspecified) only when documentation doesn't support a more specific option: meningococcal meningitis (A39.0), Waterhouse-Friderichsen syndrome (A39.1), acute meningococcemia (A39.2), chronic meningococcemia (A39.3), meningococcemia, unspecified (A39.4), meningococcal heart disease (A39.5) and other meningococcal infections (A39.8).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 870 (Septicemia or Severe Sepsis with MV >96 Hours, relative weight 6.9408), DRG 871 (Septicemia or Severe Sepsis without MV >96 Hours with MCC, relative weight 1.932) and DRG 872 (Septicemia or Severe Sepsis without MV >96 Hours without MCC, relative weight 1.0066), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.