2027 ICD-10-CM Diagnosis Code G93.0Cerebral cysts

ICD-10-CM Codes›G00–G99›G89-G99›G93

ICD-10-CM G93.0
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G93.0 is a billable ICD-10-CM diagnosis code for cerebral cysts. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 91 through 93. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other nervous system disorders (neither hereditary nor degenerative).

Code Identity

ICD-10-CM Code
G93.0
Billable Status
Yes — Valid for Submission
Code Describes
Cerebral cysts
Short Description
Cerebral cysts
Same as the full description in the CMS dataset.
Parent Code
G93
Other disorders of brain

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG93Other disorders of brain
This CodeG93.0Cerebral cysts

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired periventricular cyst
  • Acquired porencephaly
  • Acquired pseudoporencephaly
  • Arachnoid cyst
  • Arachnoid cyst of cerebellopontine angle cistern
  • Arachnoid cyst of pituitary
  • Arachnoid cyst of suprasellar meninges
  • Benign neoplasm of occipital lobe
  • Cerebellar infectious cyst
  • Cerebral arachnoid cyst
  • Cerebroretinal microangiopathy with calcifications and cysts
  • Choroid plexus cyst
  • Colloid brain cyst
  • Cyst of basal ganglia
  • Cyst of brain
  • Cyst of cerebellar structure
  • Cyst of cerebrum
  • Cyst of pineal gland
  • Cyst of posterior fossa at level of fourth ventricle
  • Cyst of septum pellucidum
  • Cyst of spinal meninges
  • Cyst of subependymal region
  • Dermoid cyst of brain
  • Dermoid cyst of occipital lobe
  • Enterogenous cyst
  • Ependymal cyst
  • Ependymal cyst of lateral ventricle of brain
  • Ependymal cyst of ventricle of brain
  • Epidermoid cyst of brain
  • Extradural spinal arachnoid cyst
  • Familial porencephaly
  • Germ cell neoplasm of brain
  • Infection causing cyst of central nervous system
  • Infectious cyst of cerebral lobe
  • Interhemispheric cyst
  • Intracranial infectious cyst
  • Intradural spinal arachnoid cyst
  • Intraventricular arachnoid cyst
  • Lesion of posterior fossa of cranial cavity
  • Leukoencephalopathy co-occurrent with bilateral anterior temporal lobe cysts
  • Leukoencephalopathy with calcifications and cysts
  • Meningeal cyst
  • Neurenteric cyst
  • Neurenteric cyst of intracranial structure
  • Pituitary cyst
  • Porencephalic cyst
  • Posttraumatic porencephalic cyst of brain
  • Pseudoporencephaly
  • Retrocerebellar cyst
  • Small vessel cerebrovascular disease
  • Spinal arachnoid cyst
  • Traumatic arachnoid cyst
  • Traumatic cyst of leptomeninges

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G93.0: its own notes plus those printed at Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Arachnoid cyst
  • Porencephalic cyst, acquired

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • acquired periventricular cysts of newborn (P91.1)
  • congenital cerebral cysts (Q04.6)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • 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)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name G93.0, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming G93.0: they are not reported together with it, unless the two conditions are unrelated.

  • Q04.6 Congenital cerebral cysts
    acquired porencephalic cyst (G93.0)

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS020
Other nervous system disorders (neither hereditary nor degenerative)
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Cerebral Cyst

    a fluid filled sac within the cerebrum. it is can be congenital, trauma related or secondary to another medical condition for example an infarction.

Patient EducationClinical

Brain Diseases

Your brain is the control center of your body. It controls your thoughts, memory, speech, and movement. It regulates the function of many organs. It's part of your nervous system, which also includes your spinal cord and peripheral nerves. The nervous system sends signals between your brain and the rest of the body.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert G93.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
348.0 Cerebral cysts
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G93.0Overview

What is the ICD-10 code for cerebral cysts?

The ICD-10-CM code for cerebral cysts is G93.0 (sometimes written as G930). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is G93.0 (Other disorders of brain) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report cerebral cysts on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does G93.0 group to?

When cerebral cysts is the principal diagnosis on an inpatient stay, it groups to MS-DRG 91, 92, 93, with relative weights from 0.7783 to 1.7050 depending on complications. Higher weights mean higher Medicare reimbursement.

Can G93.0 be reported with P91.1?

Not as a rule. The Excludes1 note on G93.0 lists "acquired periventricular cysts of newborn (P91.1)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of G93.0?

Under the General Equivalence Mappings, cerebral cysts converts to ICD-9-CM 348.0 (cerebral cysts). The mapping is a direct match.