G11 | 
		  | 
		Hereditary ataxia   | 
	
	
		 |  | 
		
	
		| Excludes2 | 
		cerebral palsy (G80.-) hereditary and idiopathic neuropathy (G60.-) metabolic disorders (E70-E88)
  | 
	 
 
 | 
	
 |  | 
	
		 G11.0 | 
		 | 
		Congenital nonprogressive ataxia | 
	 
  | 
 |  | 
	
		 G11.1 | 
		 | 
		Early-onset cerebellar ataxia | 
	 
 |  | 
	
		 G11.10 | 
		 | 
		Early-onset cerebellar ataxia, unspecified | 
	 
  |   |  | 
	
		 G11.11 | 
		  | 
		Friedreich ataxia | 
	 
	
		 |  | 
		
| Autosomal recessive Friedreich ataxia |  | Friedreich ataxia with retained reflexes |   
 | 
	   |   |  | 
	
		 G11.19 | 
		  | 
		Other early-onset cerebellar ataxia | 
	 
	
		 |  | 
		
| Early-onset cerebellar ataxia with essential tremor |  | Early-onset cerebellar ataxia with myoclonus [Hunt's ataxia] |  | Early-onset cerebellar ataxia with retained tendon reflexes |  | X-linked recessive spinocerebellar ataxia |   
 | 
	   |    | 
 |  | 
	
		 G11.2 | 
		  | 
		Late-onset cerebellar ataxia | 
	 
	
		 |  | 
		
 | 
	   | 
 |  | 
	
		 G11.3 | 
		  | 
		Cerebellar ataxia with defective DNA repair | 
	 
	
		 |  | 
		
| Ataxia telangiectasia [Louis-Bar] |  	
		| Excludes2 | 
		Cockayne's syndrome (Q87.19) other disorders of purine and pyrimidine metabolism (E79.-) xeroderma pigmentosum (Q82.1)
  | 
	 
 
 | 
	   | 
 |  | 
	
		 G11.4 | 
		 | 
		Hereditary spastic paraplegia | 
	 
  | 
 |  | 
	
		 G11.5 | 
		  | 
		Hypomyelination - hypogonadotropic hypogonadism - hypodontia | 
	 
	
		 |  | 
		
| 4H syndrome |  | Pol III-related leukodystrophy |   
 | 
	   | 
 |  | 
	
		 G11.6 | 
		 | 
		Leukodystrophy with vanishing white matter disease | 
	 
  | 
 |  | 
	
		 G11.8 | 
		 | 
		Other hereditary ataxias | 
	 
  | 
 |  | 
	
		 G11.9 | 
		  | 
		Hereditary ataxia, unspecified | 
	 
	
		 |  | 
		
| Hereditary cerebellar ataxia NOS |  | Hereditary cerebellar degeneration |  | Hereditary cerebellar disease |  | Hereditary cerebellar syndrome |   
 | 
	   |