2027 ICD-10-CM Diagnosis Code G93.89Other specified disorders of brain
ICD-10-CM Codes›G00–G99›G89-G99›G93
- Billable — Valid for Submission
- Chronic Condition
G93.89 is a billable ICD-10-CM diagnosis code for other specified disorders of brain. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 70 through 72. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other nervous system disorders (neither hereditary nor degenerative).
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Absence of the vermis
- Acquired ataxia
- Acquired enlargement of ventricle of brain
- Acquired obstructive hydrocephalus
- Ambulatory automatism
- Amyotrophic lateral sclerosis plus syndrome
- Amyotrophic lateral sclerosis with cerebellar dysfunction
- Ataxia due to subpial siderosis
- Automatism
- Bing-Neel syndrome
- Borries' syndrome
- Brain calcification Rajab type
- Brainstem myoclonus
- Bruns' syndrome
- Celiac disease
- Celiac disease with epilepsy and cerebral calcification syndrome
- Central nervous system dysfunction in newborn
- Cerebral akinetopsia
- Cerebral calcification
- Cerebral pseudoatrophy
- Cerebroretinal microangiopathy with calcifications and cysts
- Cochlear nerve disorder
- Command automatism
- Corpus callosum syndrome
- Craniosynostosis and intracranial calcification syndrome
- Dementia due to prion disease
- Dementia due to progressive subcortical gliosis
- Disorder of basal ganglia
- Disorder of brain due to and following radiotherapy
- Early delayed radiation induced brain injury
- Encephalomalacia
- Encephalopathy caused by ionizing radiation
- Encephalopathy following radiation therapy
- Encephalopathy, intracerebral calcification, retinal degeneration syndrome
- Entrapment of inferior horn of lateral ventricle
- Focal white matter lesion
- Fourth ventriculomegaly
- Hyperplasia of choroid plexus
- Increased cerebrospinal fluid production
- Increased cerebrospinal fluid production due to hyperplasia of choroid plexus
- Infantile choroidocerebral calcification syndrome
- Lesion of bilateral basal ganglia
- Leukoencephalopathy with calcifications and cysts
- Limbic disorder
- Localized intracranial lesion
- Localized lesion of brain
- Mass of left frontal lobe of brain
- Mass of left parietal lobe of brain
- Mass of left temporal lobe
- Mass of parietotemporal region of brain
- Mass of right frontal lobe of brain
- Mass of right parietal lobe of brain
- Mass of right temporal lobe
- Motor cortical disorder
- Multicystic encephalomalacia
- Necrosis of central nervous system caused by ionizing radiation
- Neonatal brainstem dysfunction
- Nervous system complication from surgically implanted device
- Neural hearing loss
- Nontraumatic injury of brain
- Obstructive hydrocephalus
- Obstructive hydrocephalus due to entrapment of inferior horn of lateral ventricle
- Parkinsonism due to mass lesion of brain
- Photomyoclonus, diabetes mellitus, deafness, nephropathy and cerebral dysfunction
- Pneumocephalus
- Premotor cortex syndrome
- Progressive subcortical gliosis
- Pseudoporencephaly
- Rambaud Gallian syndrome
- Retinal ischemia
- Scar epilepsy
- Schofer Beetz Bohl syndrome
- Sensory somatic cortical disorder
- Slit ventricle syndrome
- Small vessel cerebrovascular disease
- Snowball lesion of corpus callosum
- Speech cortex disorder
- Structural abnormality of brainstem
- Structural abnormality of caudate nucleus
- Structural abnormality of cerebral cortex
- Structural abnormality of corpus striatum
- Structural abnormality of globus pallidus
- Structural abnormality of hindbrain
- Structural abnormality of hippocampus
- Structural abnormality of hypothalamus
- Structural abnormality of olfactory bulb
- Structural abnormality of putamen
- Structural abnormality of pyramid of medulla oblongata
- Structural abnormality of thalamus
- Subpial siderosis
- Superficial siderosis of central nervous system
- Suprasellar syndrome
- Sylvian aqueduct syndrome
- Symmetric lesions of basal ganglia
- Symmetrical thalamic calcification
- Syringoencephalia
- Syringoencephalomyelia
- Tension pneumocephalus
- Thyrocerebrorenal syndrome
- Vasopressin resistance
- Ventriculomegaly
- Visual cortex dysfunction
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G93.89: 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.
- Postradiation encephalopathy
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.
- 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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Automatism G93.89
cerebral (cortex) G93.89
choroid plexus G93.89
Cicatrix (adherent) (contracted) (painful) (vicious) See Also: Scar; L90.5
brain G93.89
brain G93.89
acquired G93.89
cerebral, acquired G93.89
Depression (acute) (mental) F32.A
medullary G93.89
respiratory center G93.89
Disease, diseased See Also: Syndrome;
specified NEC G93.89
cerebral G93.89
Ependymopathy G93.89
brain G93.89
cerebral G93.89
Gliosis (cerebral) G93.89
brain G93.89
brain G93.89
intracranial G93.89
Pneumocephalus G93.89
brain G93.89
Stenosis, stenotic (cicatricial) See Also: Stricture;
brain G93.89
Syndrome See Also: Disease;
Clerambault's automatism G93.89
midbrain NEC G93.89
pontine NEC G93.89
tegmental G93.89
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Gliosis
the production of a dense fibrous network of neuroglia; includes astrocytosis, which is a proliferation of astrocytes in the area of a degenerative lesion.Pneumocephalus
presence of air or gas within the intracranial cavity (e.g., epidural space, subdural space, intracerebral, etc.) which may result from traumatic injuries, fistulous tract formation, erosions of the skull from neoplasms or infection, neurosurgical procedures, and other conditions.
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 G93.89 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G93.89Overview
What is the ICD-10 code for other specified disorders of brain?
The ICD-10-CM code for other specified disorders of brain is G93.89 (sometimes written as G9389). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is G93.89 (Other specified disorders of brain) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified disorders of brain on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G93.89 group to?
When other specified disorders of brain is the principal diagnosis on an inpatient stay, it groups to MS-DRG 72, 70, 71, with relative weights from 0.7344 to 1.6089 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of G93.89?
Under the General Equivalence Mappings, other specified disorders of brain converts to ICD-9-CM 348.89 (brain conditions NEC). The mapping is approximate, so confirm the match fits the documentation.
