2021 ICD-10-CM Diagnosis Code G93.0

Cerebral cysts

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • G93.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM G93.0 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of G93.0 - other international versions of ICD-10 G93.0 may differ.
Applicable To
  • Arachnoid cyst
  • Porencephalic cyst, acquired
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as G93.0. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • acquired periventricular cysts of newborn (
    ICD-10-CM Diagnosis Code P91.1

    Acquired periventricular cysts of newborn

      2016 2017 2018 2019 2020 2021 Billable/Specific Code Code on Newborn Record
    P91.1
    )
  • congenital cerebral cysts (
    ICD-10-CM Diagnosis Code Q04.6

    Congenital cerebral cysts

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Applicable To
    • Porencephaly
    • Schizencephaly
    Type 1 Excludes
    • acquired porencephalic cyst (G93.0)
    Q04.6
    )
The following code(s) above G93.0 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to G93.0:
  • G00-G99
    2021 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the nervous system
Approximate Synonyms
  • Acquired porencephalic cyst
  • Acquired pseudoporencephaly
  • Arachnoid cyst
  • Cerebral cyst
  • Choroid plexus cyst
  • Colloid brain cyst
  • Colloid cyst brain
  • Cyst, leptomeningeal, traumatic
  • Cystic malformation of posterior fossa
  • Porencephalic cyst
  • Posterior fossa cystic malformation
  • Pseudoporencephaly, acquired
  • Traumatic cyst of leptomeninges
Clinical Information
  • A fluid filled sac within the cerebrum. It is can be congenital, trauma related or secondary to another medical condition for example an infarction.
  • An intracranial or spinal cyst which contains fluid and is composed of arachnoid cells. Intracranial arachnoid cysts may present with headaches, seizures and hydrocephalus. Spinal arachnoid cysts may present with symptoms of radiculopathy.
  • Intracranial or spinal cavities containing a cerebrospinal-like fluid, the wall of which is composed of arachnoidal cells. They are most often developmental or related to trauma. Intracranial arachnoid cysts usually occur adjacent to arachnoidal cistern and may present with hydrocephalus; headache; seizures; and focal neurologic signs. (from Joynt, Clinical Neurology, 1994, ch44, pp105-115)
ICD-10-CM G93.0 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 091 Other disorders of nervous system with mcc
  • 092 Other disorders of nervous system with cc
  • 093 Other disorders of nervous system without cc/mcc

Convert G93.0 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
Code annotations containing back-references to G93.0:
  • Type 1 Excludes: Q04.6
    ICD-10-CM Diagnosis Code Q04.6

    Congenital cerebral cysts

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Applicable To
    • Porencephaly
    • Schizencephaly
    Type 1 Excludes
    • acquired porencephalic cyst (G93.0)

Diagnosis Index entries containing back-references to G93.0:
  • Cyst (colloid) (mucous) (simple) (retention)
    • arachnoid, brain (acquired) G93.0
    • brain (acquired) G93.0
    • choroid plexus G93.0
    • dura (cerebral) G93.0
    • meninges (cerebral) G93.0
    • porencephalic Q04.6
      ICD-10-CM Diagnosis Code Q04.6

      Congenital cerebral cysts

        2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
      Applicable To
      • Porencephaly
      • Schizencephaly
      Type 1 Excludes
      • acquired porencephalic cyst (G93.0)
      • acquired G93.0
    • subdural (cerebral) G93.0
    • corpora quadrigemina G93.0
    • cranial meninges G93.0
    • membrane, brain G93.0
  • Porencephaly (congenital) (developmental) (true) Q04.6
    ICD-10-CM Diagnosis Code Q04.6

    Congenital cerebral cysts

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Applicable To
    • Porencephaly
    • Schizencephaly
    Type 1 Excludes
    • acquired porencephalic cyst (G93.0)
    • acquired G93.0
    • nondevelopmental G93.0

ICD-10-CM Codes Adjacent To G93.0
G91 Hydrocephalus
G91.0 Communicating hydrocephalus
G91.1 Obstructive hydrocephalus
G91.2 (Idiopathic) normal pressure hydrocephalus
G91.3 Post-traumatic hydrocephalus, unspecified
G91.4 Hydrocephalus in diseases classified elsewhere
G91.8 Other hydrocephalus
G91.9 Hydrocephalus, unspecified
G92 Toxic encephalopathy
G93 Other disorders of brain
G93.0 Cerebral cysts
G93.1 Anoxic brain damage, not elsewhere classified
G93.2 Benign intracranial hypertension
G93.3 Postviral fatigue syndrome
G93.4 Other and unspecified encephalopathy
G93.40 Encephalopathy, unspecified
G93.41 Metabolic encephalopathy
G93.49 Other encephalopathy
G93.5 Compression of brain
G93.6 Cerebral edema
G93.7 Reye's syndrome

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.