ICD 10 CM Codes

G31.9 Degenerative disease of nervous system, unspecified
Billable Code  is a billable ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
GEMS
ICD-10-CM G31.9 converts approximately to:ICD-9-CM
2015 ICD-9-CM 331.9 Cerebral degeneration, unspecified
ICD-10-CM G31.9is grouped within Diagnostic Related Group(s) (MS-DRG v30.0)
56 DEGENERATIVE NERVOUS SYSTEM DISORDERS WITH MCC
57 DEGENERATIVE NERVOUS SYSTEM DISORDERS WITHOUT MCC
Type 1 Excludes
age related cognitive decline (R41.81)
altered mental status (R41.82)
cerebral degeneration (G31.9)
change in mental status (R41.82)
cognitive deficits following (sequelae of) cerebral hemorrhage or infarction (I69.01, I69.11, I69.21, I69.31, I69.81, I69.91)
cognitive impairment due to intracranial or head injury (S06.-)
dementia (F01.-, F02.-, F03)
mild memory disturbance (F06.8)
neurologic neglect syndrome (R41.4)
personality change, nonpsychotic (F68.8)
ICD-10-CM Index Entry
ICD-10-CM Index entries containing back-references to ICD-10-CM '.G31.9.'
Atrophy, atrophic (of); brain (cortex) (progressive)
Degeneration, degenerative; brain (cortical) (progressive)
Degeneration, degenerative; brain (cortical) (progressive); childhood
Degeneration, degenerative; cerebellar NOS
Degeneration, degenerative; nervous system
Hemiatrophy; cerebellar