Specific code 2012 ICD-9-CM Diagnosis Code 322.9
Meningitis, unspecified
  • Short description: Meningitis NOS.
  • ICD-9-CM 322.9 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 322.9 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
  • You are viewing the 2012 version of ICD-9-CM 322.9.
  • More recent version(s) of ICD-9-CM 322.9: 2013 2014.
Disease Synonyms
  • Arachnoiditis
  • Arachnoiditis, spinal
  • Benign multirecurrent endothelioleukocytal meningitis (disorder)
  • Meningitis
  • Meningitis, recurrent, benign
  • Pachymeningitis
  • Spinal arachnoiditis (disorder)
  • Ventriculitis
  • Ventriculitis of the brain (disorder)
Convert to ICD-10-CM: 322.9 converts directly to:
  • 2014 ICD-10-CM G03.9 Meningitis, unspecified
ICD-9-CM Volume 2 Index entries containing back-references to 322.9:
  • Arachnoiditis (acute) (adhesive) (basic) (brain) (cerebrospinal) (chiasmal) (chronic) (spinal) (see also Meningitis) 322.9
    • meningococcal (chronic) 036.0
    • tuberculous (see also Tuberculosis, meninges) 013.0
  • Effusion
    • cerebrospinal (see also Meningitis) 322.9
    • meninges (see also Meningitis) 322.9
    • spinal (see also Meningitis) 322.9
  • Ependymitis (acute) (cerebral) (chronic) (granular) (see also Meningitis) 322.9
  • Infection, infected, infective (opportunistic) 136.9
    • brain (see also Encephalitis) 323.9
      • late effect - see category 326
      • membranes - (see also Meningitis) 322.9
      • septic 324.0
        • late effect - see category 326
        • meninges (see also Meningitis) 320.9
    • cerebrospinal (see also Meningitis) 322.9
      • late effect - see category 326
  • Inflammation, inflamed, inflammatory (with exudation)
    • cerebrospinal (see also Meningitis) 322.9
      • late effect - see category 326
      • meningococcal 036.0
      • tuberculous (see also Tuberculosis) 013.6
  • Leptomeningitis (chronic) (circumscribed) (hemorrhagic) (nonsuppurative) (see also Meningitis) 322.9
    • late effect - see category 326
    • tuberculous (see also Tuberculosis, meninges) 013.0
  • Leptomeningopathy (see also Meningitis) 322.9
  • Meningitis (basal) (basic) (basilar) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetica) (toxic) 322.9
    • abacterial NEC (see also Meningitis, aseptic) 047.9
    • anaerobes (cocci) (gram-negative) (gram-positive) (mixed) (NEC) 320.81
    • Bacteroides (fragilis) (oralis) (melaninogenicus) 320.81
    • cancerous (M8000/6) 198.4
    • carcinomatous (M8010/6) 198.4
    • caseous (see also Tuberculosis, meninges) 013.0
    • cerebrospinal (acute) (chronic) (diplococcal) (endemic) (epidemic) (fulminant) (infectious) (malignant) (meningococcal) (sporadic) 036.0
    • clear cerebrospinal fluid NEC 322.0
    • Clostridium (haemolyticum) (novyi) NEC 320.81
    • Diplococcus pneumoniae 320.1
    • endothelial-leukocytic, benign, recurrent 047.9
    • Escherichia coli (E. coli) 320.82
    • Friedl√§nder (bacillus) 320.82
    • gram-positive cocci NEC 320.9
    • late effect - see Late, effect, meningitis
    • lymphocytic (acute) (benign) (serous) 049.0
      • choriomeningitis virus 049.0
    • meningococcal (chronic) 036.0
    • nonbacterial NEC (see also Meningitis, aseptic) 047.9
    • Pseudomonas (aeruginosa) (pyocyaneus) 320.82
    • serosa circumscripta NEC 322.0
    • serous NEC (see also Meningitis, aseptic) 047.9
    • sporadic cerebrospinal 036.0
    • streptococcal (acute) 320.2
    • traumatic (complication of injury) 958.8
    • Treponema (denticola) (macrodenticum) 320.81
    • tuberculous (see also Tuberculosis, meninges) 013.0
    • viral, virus NEC (see also Meningitis, aseptic) 047.9
    • Wallgren's (see also Meningitis, aseptic) 047.9
  • Pachymeningitis (adhesive) (basal) (brain) (cerebral) (cervical) (chronic) (circumscribed) (external) (fibrous) (hemorrhagic) (hypertrophic) (internal) (purulent) (spinal) (suppurative) (see also Meningitis) 322.9
  • Ventriculitis, cerebral (see also Meningitis) 322.9
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 322.9 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2012 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.