Other disorders of brain (G93) ICD-10-CM
The G93 code range covers other disorders of brain with 24 ICD-10-CM diagnosis codes. 20 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the G93 Range 24 codes · 20 billable
- G93 Other disorders of brainNon-billable
- G93.0 Cerebral cysts
- G93.1 Anoxic brain damage, not elsewhere classified
- G93.2 Benign intracranial hypertension
- G93.3 Postviral and related fatigue syndromesNon-billable
- G93.31 Postviral fatigue syndrome
- G93.32 Myalgic encephalomyelitis/chronic fatigue syndrome
- G93.39 Other post infection and related fatigue syndromes
- G93.4 Other and unspecified encephalopathyNon-billable
- G93.40 Encephalopathy, unspecified
- G93.41 Metabolic encephalopathy
- G93.42 Megalencephalic leukoencephalopathy with subcortical cysts
- G93.43 Leukoencephalopathy with calcifications and cysts
- G93.44 Adult-onset leukodystrophy with axonal spheroids
- G93.45 Developmental and epileptic encephalopathy
- G93.49 Other encephalopathy
- G93.5 Compression of brain
- G93.6 Cerebral edema
- G93.7 Reye's syndrome
- G93.8 Other specified disorders of brainNon-billable
- G93.81 Temporal sclerosis
- G93.82 Brain death
- G93.89 Other specified disorders of brain
- G93.9 Disorder of brain, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the G93 range.
Automatism
Automatic, mechanical, and apparently undirected behavior which is outside of conscious control.
Brain Death
A state of prolonged irreversible cessation of all brain activity, including lower brain stem function with the complete absence of voluntary movements, responses to stimuli, brain stem reflexes, and spontaneous respirations. Reversible conditions which mimic this clinical state (e.g., sedative overdose, hypothermia, etc.) are excluded prior to making the determination of brain death. (From Adams et al., Principles of Neurology, 6th ed, pp348-9)
Celiac Disease
A malabsorption syndrome that is precipitated by the ingestion of foods containing GLUTEN, such as wheat, rye, and barley. It is characterized by INFLAMMATION of the SMALL INTESTINE, loss of MICROVILLI structure, failed INTESTINAL ABSORPTION, and MALNUTRITION.
Encephalomalacia
Softening or loss of brain tissue following CEREBRAL INFARCTION; cerebral ischemia (see BRAIN ISCHEMIA), infection, CRANIOCEREBRAL TRAUMA, or other injury. The term is often used during gross pathologic inspection to describe blurred cortical margins and decreased consistency of brain tissue following infarction. Multicystic encephalomalacia refers to the formation of multiple cystic cavities of various sizes in the cerebral cortex of neonates and infants following injury, most notably perinatal hypoxia-ischemic events. (From Davis et al., Textbook of Neuropathology, 2nd ed, p665; J Neuropathol Exp Neurol, 1995 Mar;54(2):268-75)
Leukomalacia, Periventricular
Degeneration of white matter adjacent to the CEREBRAL VENTRICLES following cerebral hypoxia or BRAIN ISCHEMIA in neonates. The condition primarily affects white matter in the perfusion zone between superficial and deep branches of the MIDDLE CEREBRAL ARTERY. Clinical manifestations include VISION DISORDERS; CEREBRAL PALSY; PARAPLEGIA; SEIZURES; and cognitive disorders. (From Adams et al., Principles of Neurology, 6th ed, p1021; Joynt, Clinical Neurology, 1997, Ch4, pp30-1)
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.
Slit Ventricle Syndrome
An intermittent and self-limiting headache disorder in individuals with CEREBROSPINAL FLUID SHUNTS emplaced for the treatment of HYDROCEPHALUS. The symptoms of headache, vomiting, and cranial neuropathies are associated with intermittent obstruction of the shunt.
About the G93 Code Range
The ICD-10 code section G93 covers a range of other disorders of the brain that are not grouped under more specific brain disease categories. These codes are used to document conditions such as cerebral cysts, brain damage caused by lack of oxygen, benign intracranial hypertension, encephalopathies, brain compression, cerebral edema, and brain death among others.
This section includes detailed codes like G93.0 for cerebral cysts, encompassing types like arachnoid cysts and ependymal cysts, and G93.1 for anoxic brain damage, which covers brain injury due to oxygen deprivation often linked to terms like anoxic encephalopathy or hypoxic-ischemic coma. The code G93.2 is specific for benign intracranial hypertension, often related to raised intracranial pressure and pseudoneoplasm cerebri. Fatigue syndromes post-infection fall under G93.3, including postviral fatigue syndrome recognized under synonyms such as postviral infection debility. Other notable codes include G93.6 for cerebral edema and G93.82 for brain death. This section aids healthcare providers and medical coders in assigning precise codes for complex brain disorders that do not fit typical categories, ensuring accurate tracking and treatment documentation.
Questions About This Page
How many billable codes are in the G93 range?
Of the 24 codes in this range, 20 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the G93 range classify?
The range classifies other disorders of brain. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
