INFLAMMATORY DISEASES OF THE CENTRAL NERVOUS SYSTEM (320-326)
- 320 Bacterial meningitis
- Includes: arachnoiditis bacterial
- leptomeningitis bacterial
- meningitis bacterial
- meningoencephalitis bacterial
- meningomyelitis bacterial
- pachymeningitis bacterial
- 320.0 Hemophilus meningitis
- Meningitis due to Hemophilus influenzae [H. influenzae]
- 320.1 Pneumococcal meningitis
- 320.2 Streptococcal meningitis
- 320.3 Staphylococcal meningitis
- 320.7 Meningitis in other bacterial diseases classified elsewhere
- Code first underlying disease as:
- actinomycosis (039.8)
- listeriosis (027.0)
- typhoid fever (002.0)
- whooping cough (033.0-033.9)
- Excludes: meningitis (in):
- epidemic (036.0)
- gonococcal (098.82)
- meningococcal (036.0)
- salmonellosis (003.21)
- syphilis:
- NOS (094.2)
- congenital (090.42)
- meningovascular (094.2)
- secondary (091.81)
- tuberculosis (013.0)
- 320.8 Meningitis due to other specified bacteria
- 320.81 Anaerobic meningitis
- Gram-negative anaerobes
- Bacteroides (fragilis)
- 320.82 Meningitis due to gram-negative bacteria, not elsewhere classified
- Aerobacter aerogenes
- Escherichia coli [E. coli]
- Friedlander bacillus
- Klebsiella pneumoniae
- Proteus morganii
- Pseudomonas
- Excludes: gram-negative anaerobes (320.81)
- 320.89 Meningitis due to other specified bacteria
- 320.9 Meningitis due to unspecified bacterium
- Meningitis:
- bacterial NOS
- purulent NOS
- pyogenic NOS
- suppurative NOS
- 321 Meningitis due to other organisms
- Includes: arachnoiditis due to organisms other than bacteria
- leptomeningitis due to organisms other than bacteria
- meningitis due to organisms other than bacteria
- pachymeningitis due to organisms other than bacteria
- 321.0 Cryptococcal meningitis
- Code first underlying disease (117.5)
- 321.1 Meningitis in other fungal diseases
- Code first underlying disease (110.0-118)
- Excludes: meningitis in:
- candidiasis (112.83)
- coccidioidomycosis (114.2)
- histoplasmosis (115.01, 115.11, 115.91)
- 321.2 Meningitis due to viruses not elsewhere classified
- Code first underlying disease, as:
- meningitis due to arbovirus (060.0-066.9)
- Excludes: meningitis (due to):
- abacterial (047.0-047.9)
- adenovirus (049.1)
- aseptic NOS (047.9)
- Coxsackie (virus) (047.0)
- ECHO virus (047.1)
- enterovirus (047.0-047.9)
- herpes simplex virus (054.72)
- herpes zoster virus (053.0)
- lymphocytic choriomeningitis virus (049.0)
- mumps (072.1)
- viral NOS (047.9)
- meningo-eruptive syndrome (047.1)
- 321.3 Meningitis due to trypanosomiasis
- Code first underlying disease (086.0-086.9)
- 321.4 Meningitis in sarcoidosis
- Code first underlying disease (135)
- 321.8 Meningitis due to other nonbacterial organisms classified elsewhere
- Code first underlying disease
- Excludes: leptospiral meningitis (100.81)
- 322 Meningitis of unspecified cause
- Includes: arachnoiditis with no organism specified as cause
- leptomeningitis with no organism specified as cause
- meningitis with no organism specified as cause
- pachymeningitis with no organism specified as cause
- 322.0 Nonpyogenic meningitis
- Meningitis with clear cerebrospinal fluid
- 322.1 Eosinophilic meningitis
- 322.2 Chronic meningitis
- 322.9 Meningitis, unspecified
- 323 Encephalitis, myelitis, and encephalomyelitis
- Includes: acute disseminated encephalomyelitis
- meningoencephalitis, except bacterial
- meningomyelitis, except bacterial
- myelitis (acute):
- Excludes: bacterial:
- meningoencephalitis (320.0-320.9)
- meningomyelitis (320.0-320.9)
- 323.0 Encephalitis in viral diseases classified elsewhere
- Code first underlying disease, as:
- cat-scratch disease (078.3)
- infectious mononucleosis (075)
- ornithosis (073.7)
- Excludes: encephalitis (in):
- arthropod-borne viral (062.0-064)
- herpes simplex (054.3)
- mumps (072.2)
- poliomyelitis (045.0-045.9)
- rubella (056.01)
- slow virus infections of central nervous system (046.0-046.9)
- other viral diseases of central nervous system (049.8-049.9)
- viral NOS (049.9)
- 323.1 Encephalitis in rickettsial diseases classified elsewhere
- Code first underlying disease (080-083.9)
- 323.2 Encephalitis in protozoal diseases classified elsewhere
- Code first underlying disease, as:
- malaria (084.0-084.9)
- trypanosomiasis (086.0-086.9)
- 323.4 Other encephalitis due to infection classified elsewhere
- Code first underlying disease
- Excludes: encephalitis (in):
- meningococcal (036.1)
- syphilis:
- NOS (094.81)
- congenital (090.41)
- toxoplasmosis (130.0)
- tuberculosis (013.6)
- meningoencephalitis due to free-living ameba [Naegleria] (136.2)
- 323.5 Encephalitis following immunization procedures
- Encephalitis postimmunization or postvaccinal
- Encephalomyelitis postimmunization or postvaccinal
- Use additional E code to identify vaccine
- 323.6 Postinfectious encephalitis
- Code first underlying disease
- Excludes: encephalitis:
- postchickenpox (052.0)
- postmeasles (055.0)
- 323.7 Toxic encephalitis
- Code first underlying cause, as:
- carbon tetrachloride (982.1)
- hydroxyquinoline derivatives (961.3)
- lead (984.0-984.9)
- mercury (985.0)
- thallium (985.8)
- 323.8 Other causes of encephalitis
- 323.9 Unspecified cause of encephalitis
- 324 Intracranial and intraspinal abscess
- 324.0 Intracranial abscess
- Abscess (embolic):
- Abscess (embolic) of brain [any part]:
- epidural
- extradural
- otogenic
- subdural
- Excludes: tuberculous (013.3)
- 324.1 Intraspinal abscess
- Abscess (embolic) of spinal cord [any part]:
- epidural
- extradural
- subdural
- Excludes: tuberculous (013.5)
- 324.9 Of unspecified site
- Extradural or subdural abscess NOS
- 325 Phlebitis and thrombophlebitis of intracranial venous sinuses
- Embolism of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus
- Endophlebitis of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus
- Phlebitis, septic or suppurative of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus
- Thrombophlebitis of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus
- Thrombosis of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus
- Excludes: that specified as:
- complicating pregnancy, childbirth, or the puerperium (671.5)
- of nonpyogenic origin (437.6)
- 326 Late effects of intracranial abscess or pyogenic infection
- Note: This category is to be used to indicate conditions whose primary classification is to 320-325 [excluding 320.7, 321.0-321.8, 323.0-323.4, 323.6-323.7] as the cause of late effects, themselves classifiable elsewhere. The "late effects" include conditions specified as such, or as sequelae, which may occur at any time after the resolution of the causal condition.
- Use additional code to identify condition, as:
- hydrocephalus (331.4)
- paralysis (342.0-342.9, 344.0-344.9)