G31.9
BillableDegenerative disease of nervous system, unspecified
Degenerative disease of nervous system, unspecified
Coding Notes
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •Reye's syndromeG93.7
Use Additional Code
Additional codes that should follow this code
- •code, if applicable, for codes , , to identify:G31.0-G31.83, G31.85-G31.9
- •dementia with anxiety, A4, B4, C4)F02.84, F02, F02, F02
- •dementia with behavioral disturbance, A1-, B1-, C1-)F02.81, F02, F02, F02
- •dementia with mood disturbance, A3, B3, C3)F02.83, F02, F02, F02
- •dementia with psychotic disturbance, A2, B2, C2)F02.82, F02, F02, F02
- •dementia without behavioral disturbance, A0, B0, C0)F02.80, F02, F02, F02
- •mild neurocognitive disorder due to known physiological conditionF06.7
Related Codes(4)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(233)
SNOMED CT
- Hydrocephalus ex vacuo14055002
- Degenerative brain disorder52522001
- Degenerative disease of the central nervous system80690008
- Congenital blindness95486002
- Cerebellar degeneration95646004
- Circumscribed atrophy of brain111033008
- Cerebral degeneration due to Creutzfeldt-Jakob disease192818008
- Secondary cerebellar degeneration230241000
- Frontotemporal degeneration230273006
- Lobar atrophy230273006
- Frontal lobe degeneration with motor neurone disease230274000
- Chronic deafness232325008
- Cerebral atrophy278849000
- Frontal lobe degeneration278855005
- Cerebral degeneration presenting primarily with dementia279982005
- Cerebral degeneration418143002
- Cerebral degeneration due to Parkinson disease438513002
- Cerebral degeneration due to Parkinson's disease438513002
- Benson syndrome715574002
- Posterior cortical atrophy715574002
- Posterior cortical atrophy syndrome715574002
- Prieto Badia Mulas syndrome719140001
- X-linked intellectual disability with dysmorphism and cerebral atrophy syndrome719140001
- MOBA syndrome720010009
- Microphthalmia with brain atrophy syndrome720010009
- Syndromic microphthalmia type 10720010009
- Parkinsonism due to heredodegenerative disorder722965000
- Chorea due to heredodegenerative disorder722966004
- Autonomic nervous system disorder co-occurrent and due to neurodegenerative disorder724813004
- Autonomic nervous system disorder with neurodegenerative disorder724813004
- Epilepsy co-occurrent and due to degenerative brain disorder724988000
- Epilepsy with degenerative brain disorder724988000
- Progressive focal cortical atrophy737228009
- Gemignani syndrome782690007
- Spinocerebellar ataxia, amyotrophy, deafness syndrome782690007
- Pallidopyramidal syndrome783012006
- Parkinsonian pyramidal syndrome783012006
- Atrophy of hilum of dentate nucleus1144380009
- Atrophy of brainstem1144381008
- Atrophy of caudate nucleus1144383006
- Atrophy of pyramidal tract1144384000
- Atrophy of inner granular layer of cerebellar cortex1144385004
- Atrophy of Purkinje cells of cerebellar cortex1144386003
- Atrophy of cerebellar Purkinje layer1144386003
- Atrophy of cerebellar vermis1144387007
- Hemiatrophy of cerebellar cortex1144424004
- Diffuse atrophy of cerebellar structure1144426002
- Diffuse atrophy of cerebellum1144426002
- Diffuse atrophy of cerebral structure1144427006
- Diffuse atrophy of cerebrum1144427006
- Atrophy of cortex of frontal lobe1144428001
- Atrophy of cortex of frontal and temporal lobe1144429009
- Frontotemporal cerebral atrophy1144429009
- Global brain atrophy1144430004
- Atrophy of hippocampus1144431000
- Hippocampal atrophy1144431000
- Atrophy of hypothalamus1144432007
- Hypothalamic atrophy1144432007
- Atrophy of cortex of occipital lobe1144433002
- Occipital cortical atrophy1144433002
- Atrophy of cortex of parietal lobe1144434008
- Parietal cortical atrophy1144434008
- Atrophy of pons and cerebellar structure1144436005
- Atrophy of pons and cerebellum1144436005
- Pontocerebellar atrophy1144436005
- Atrophy of spinocerebellar tract1144438006
- Spinocerebellar atrophy1144438006
- Atrophy of cortex of temporal lobe1144439003
- Temporal cortical atrophy1144439003
- Hydrocephalus ex vacuo due to degenerative brain disorder1260342005
- FINCA (fibrosis, neurodegeneration, cerebral angiomatosis) syndrome1348304006
- Fibrosis, neurodegeneration, cerebral angiomatosis syndrome1348304006
- Interstitial lung fibrosis, neurodegeneration, cerebral angiomatosis syndrome1348304006
- Cerebral cortical hemiatrophy1366140004
- Hemiatrophy of cerebral cortex1366140004
- Acquired cerebral atrophy691461000119103
- Chronic fibrosing ILD-interstitial lung disease460561000124109
- PF-ILD-progressive fibrosing interstitial lung disease460561000124109
- Progressive fibrosing interstitial lung disease460561000124109
- Progressive lung fibrosis460561000124109
UMLS
- DEGENERATIVE DIS NERVOUS SYSTEMC0524851
- DEGENERATIVE DIS NEUROLOGICC0524851
- DEGENERATIVE NEUROLOGIC DISC0524851
- Degenerative Condition, NeurologicC0524851
- Degenerative Conditions, NeurologicC0524851
- Degenerative Disease of Nervous System, UnspecifiedC0524851
- Degenerative Diseases, Nervous SystemC0524851
- Degenerative Diseases, NeurologicC0524851
- Degenerative Neurologic DiseaseC0524851
- Degenerative Neurologic DiseasesC0524851
- Degenerative Neurologic DisorderC0524851
- Degenerative Neurologic DisordersC0524851
- Degenerative disease of nervous system, unspecifiedC0524851
- NERVOUS SYSTEM DEGENERATIVE DISC0524851
- NEURODEGENERATIVE DISC0524851
- NEUROLOGIC DEGENERATIVE DISC0524851
- NEUROLOGIC DIS DEGENERATIVEC0524851
- Nervous System Degenerative DiseasesC0524851
- Neurodegenerative DiseaseC0524851
- Neurodegenerative DiseasesC0524851
- Neurodegenerative DisorderC0524851
- Neurodegenerative DisordersC0524851
- Neurodegenerative diseaseC0524851
- Neurodegenerative diseasesC0524851
- Neurodegenerative disorderC0524851
- Neurologic Degenerative ConditionC0524851
- Neurologic Degenerative ConditionsC0524851
- Neurologic Degenerative DiseaseC0524851
- Neurologic Degenerative DiseasesC0524851
- Neurologic Disease, DegenerativeC0524851
- Neurologic Diseases, DegenerativeC0524851
- Neurologic Disorder, DegenerativeC0524851
- Neurologic Disorders, DegenerativeC0524851
- degenerative disorders neurologicC0524851
- degenerative neurologic diseasesC0524851
- degenerative neurologic disorderC0524851
- disease neurodegenerativeC0524851
- diseases neurodegenerativeC0524851
- neurodegenerative diseaseC0524851
- neurodegenerative diseasesC0524851
- neurodegenerative disorderC0524851
- neurodegenerative disordersC0524851
Clinical Terms
- Neurodegenerative Diseases
- DEGENERATIVE DIS NEUROLOGIC
- Atrophy of Purkinje cells of cerebellar cortex
- degenerative disorders neurologic
- Hemiatrophy of cerebellar cortex
- Global brain atrophy
- Progressive lung fibrosis
- Fibrosis, neurodegeneration, cerebral angiomatosis syndrome
- Frontal lobe degeneration
- Frontotemporal cerebral atrophy
- Cerebral degeneration due to Parkinson's disease
- Degenerative Neurologic Diseases
- Neurologic Disease, Degenerative
- diseases neurodegenerative
- Degenerative brain disorder
- Chronic deafness
- Parkinsonian pyramidal syndrome
- X-linked intellectual disability with dysmorphism and cerebral atrophy syndrome
- Epilepsy co-occurrent and due to degenerative brain disorder
- Gemignani syndrome
- NERVOUS SYSTEM DEGENERATIVE DIS
- Atrophy of brainstem
- Neurologic Degenerative Condition
- Diffuse atrophy of cerebrum
- Atrophy of pons and cerebellum
- Diffuse atrophy of cerebellum
- neurodegenerative disorders
- Neurodegenerative Disorder
- Diffuse atrophy of cerebral structure
- Parkinsonism due to heredodegenerative disorder
- Degenerative Condition, Neurologic
- Neurologic Degenerative Diseases
- Atrophy of cerebellar vermis
- Atrophy of cortex of parietal lobe
- Microphthalmia with brain atrophy syndrome
- Atrophy of cortex of temporal lobe
- Degenerative disease of the central nervous system
- Hemiatrophy of cerebral cortex
- NEUROLOGIC DEGENERATIVE DIS
- disease neurodegenerative
- NEUROLOGIC DIS DEGENERATIVE
- Frontal lobe degeneration with motor neurone disease
- Neurologic Diseases, Degenerative
- Congenital blindness
- Neurologic Degenerative Conditions
- Parietal cortical atrophy
- Cerebral degeneration due to Parkinson disease
- Interstitial lung fibrosis, neurodegeneration, cerebral angiomatosis syndrome
- Epilepsy with degenerative brain disorder
- Secondary cerebellar degeneration
- Atrophy of cerebellar Purkinje layer
- Atrophy of hilum of dentate nucleus
- Cerebral degeneration due to Creutzfeldt-Jakob disease
- Neurodegenerative disease
- PF-ILD-progressive fibrosing interstitial lung disease
- Cerebral cortical hemiatrophy
- Acquired cerebral atrophy
- Cerebral degeneration presenting primarily with dementia
- Lobar atrophy
- Posterior cortical atrophy
- Prieto Badia Mulas syndrome
- Atrophy of cortex of occipital lobe
- DEGENERATIVE DIS NERVOUS SYSTEM
- Nervous System Degenerative Diseases
- Neurologic Degenerative Disease
- Cerebral degeneration
- Atrophy of caudate nucleus
- Hydrocephalus ex vacuo due to degenerative brain disorder
- Atrophy of spinocerebellar tract
- Progressive focal cortical atrophy
- Spinocerebellar ataxia, amyotrophy, deafness syndrome
- MOBA syndrome
- FINCA (fibrosis, neurodegeneration, cerebral angiomatosis) syndrome
- Pontocerebellar atrophy
- Circumscribed atrophy of brain
- Hippocampal atrophy
- Cerebral atrophy
- NEURODEGENERATIVE DIS
- Atrophy of inner granular layer of cerebellar cortex
- Chorea due to heredodegenerative disorder
- Spinocerebellar atrophy
- DEGENERATIVE NEUROLOGIC DIS
- Degenerative Neurologic Disorders
- Hydrocephalus ex vacuo
- Atrophy of hypothalamus
- degenerative neurologic disorder
- Degenerative Conditions, Neurologic
- Autonomic nervous system disorder co-occurrent and due to neurodegenerative disorder
- Cerebellar degeneration
- Neurologic Disorder, Degenerative
- Frontotemporal degeneration
- Atrophy of cortex of frontal and temporal lobe
- Autonomic nervous system disorder with neurodegenerative disorder
- Pallidopyramidal syndrome
- Syndromic microphthalmia type 10
- Progressive fibrosing interstitial lung disease
- Degenerative Diseases, Neurologic
- Diffuse atrophy of cerebellar structure
- Atrophy of pons and cerebellar structure
- Occipital cortical atrophy
- Atrophy of cortex of frontal lobe
- Atrophy of hippocampus
- Degenerative Neurologic Disease
- Posterior cortical atrophy syndrome
- Chronic fibrosing ILD-interstitial lung disease
- Neurologic Disorders, Degenerative
- Benson syndrome
- Hypothalamic atrophy
- Degenerative Diseases, Nervous System
- Temporal cortical atrophy
- Atrophy of pyramidal tract
Frequently Asked Questions
What is the ICD-10 code for degenerative disease of nervous system, unspecified?
The ICD-10-CM code for degenerative disease of nervous system, unspecified is G31.9. The full clinical description is "Degenerative disease of nervous system, unspecified". G31.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code G31.9 mean?
ICD-10-CM code G31.9 represents “Degenerative disease of nervous system, unspecified”. It is classified under Chapter 6: Diseases of the Nervous System and is a billable/specific code that can be used on a claim.
Is G31.9 a billable code?
Yes, G31.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is G31.9 in?
G31.9 is in Chapter 6: Diseases of the Nervous System (codes G00-G99).
Are additional codes required with G31.9?
Yes, when using G31.9, also report: code, if applicable, for codes G31.0-G31.83, G31.85-G31.9, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).
What SNOMED CT codes does G31.9 map to?
G31.9 maps to 51 SNOMED CT concepts: 691461000119103, 1144386003, 1144381008, 1144383006, 1144387007, and 46 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for G31.9?
G31.9 is linked to 1 UMLS Concept Unique Identifier: C0524851. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does G31.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like degenerative disease of nervous system, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of G31.9?
G31.9 maps to the ICD-11 code: 8A2Z (Disorders with neurocognitive impairment as a major feature, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.