Meningococcal infection (A39) ICD-10-CM
The A39 code range covers meningococcal infection with 18 ICD-10-CM diagnosis codes. 15 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the A39 Range 18 codes · 15 billable
- A39 Meningococcal infectionNon-billable
- A39.0 Meningococcal meningitis
- A39.1 Waterhouse-Friderichsen syndrome
- A39.2 Acute meningococcemia
- A39.3 Chronic meningococcemia
- A39.4 Meningococcemia, unspecified
- A39.5 Meningococcal heart diseaseNon-billable
- A39.50 Meningococcal carditis, unspecified
- A39.51 Meningococcal endocarditis
- A39.52 Meningococcal myocarditis
- A39.53 Meningococcal pericarditis
- A39.8 Other meningococcal infectionsNon-billable
- A39.81 Meningococcal encephalitis
- A39.82 Meningococcal retrobulbar neuritis
- A39.83 Meningococcal arthritis
- A39.84 Postmeningococcal arthritis
- A39.89 Other meningococcal infections
- A39.9 Meningococcal infection, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A39 range.
Meningitis, Meningococcal
A fulminant infection of the meninges and subarachnoid fluid by the bacterium NEISSERIA MENINGITIDIS, producing diffuse inflammation and peri-meningeal venous thromboses. Clinical manifestations include FEVER, nuchal rigidity, SEIZURES, severe HEADACHE, petechial rash, stupor, focal neurologic deficits, HYDROCEPHALUS, and COMA. The organism is usually transmitted via nasopharyngeal secretions and is a leading cause of meningitis in children and young adults. Organisms from Neisseria meningitidis serogroups A, B, C, Y, and W-135 have been reported to cause meningitis. (From Adams et al., Principles of Neurology, 6th ed, pp689-701; Curr Opin Pediatr 1998 Feb;10(1):13-8)
Meningococcal Endocarditis
Endocarditis caused by bacterial infection with Meningococcus species.
Meningococcal Infections
Infections with bacteria of the species NEISSERIA MENINGITIDIS.
Meningococcemia
Septicemia due to the presence of the bacterium Neisseria meningitidis in the bloodstream.
Waterhouse-Friderichsen Syndrome
A condition of HEMORRHAGE and NECROSIS of the ADRENAL GLAND. It is characterized by rapidly developing ADRENAL INSUFFICIENCY; HYPOTENSION; and widespread cutaneous PURPURA.
About the A39 Code Range
Meningococcal infections come from the bacterium Neisseria meningitidis.
The subdivisions of A39 distinguish named conditions, meningococcemia described as acute or chronic, heart disease, other infections, and infection without a specified type. The heart disease branch separates named heart conditions from an unspecified type. The other-infection branch has separate entries for arthritis and arthritis following meningococcal infection.
Questions About This Page
How many billable codes are in the A39 range?
Of the 18 codes in this range, 15 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the A39 range classify?
The range classifies meningococcal infection. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
