2023 ICD-10-CM Diagnosis Code G30.9

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Alzheimer's disease, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • G30.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2023 edition of ICD-10-CM G30.9 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of G30.9 - other international versions of ICD-10 G30.9 may differ.
The following code(s) above G30.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to G30.9:
  • G00-G99
    2023 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    Type 2 Excludes
    • 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)
    Diseases of the nervous system
  • G30
    ICD-10-CM Diagnosis Code G30

    Alzheimer's disease

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    • Alzheimer's dementia senile and presenile forms
    Type 1 Excludes
    • senile degeneration of brain NEC (G31.1)
    • senile dementia NOS (F03)
    • senility NOS (R41.81)
    Use Additional
    Alzheimer's disease
Approximate Synonyms
  • Alzheimer's dementia without behavioral disturbance
  • Alzheimer's disease
  • Alzheimer's disease with altered behavior
  • Alzheimer's disease with behavioral disturbance
  • Alzheimer's disease with behavioral disturbance and delerium
  • Alzheimer's disease with behavioral disturbance and delusions
  • Alzheimer's disease with behavioral disturbance and depressed mood
  • Alzheimer's disease with delerium
  • Alzheimer's disease with delusions
  • Alzheimer's disease with depressed mood
  • Alzheimer's disease without altered behavior
  • Alzheimers dementia
  • Alzheimers dementia w behavioral disturbance
  • Alzheimers dementia w behavioral disturbance w delirium
  • Alzheimers dementia w behavioral disturbance w delusions
  • Alzheimers dementia w behavioral disturbance w depressed mood
  • Alzheimers dementia with delirium
  • Alzheimers dementia with delusions
  • Alzheimers dementia with depressed mood
  • Alzheimers dementia without behavioral disturbance
  • Alzheimers dementia. With delirium
  • Alzheimers disease
  • Delusions in alzheimer's disease
  • Dementia due to alzheimer's disease
  • Dementia due to alzheimers disease
  • Dementia due to alzheimers with behavior changes
  • Dementia due to alzheimers without behavior changes
  • Dementia of the alzheimer type with behavioral disturbance
  • Depressed mood in alzheimer's disease
Clinical Information
  • A brain disorder that usually starts in late middle age or old age and gets worse over time. Symptoms include loss of memory, confusion, difficulty thinking, and changes in language, behavior, and personality.
  • A degenerative disease of the brain characterized by the insidious onset of dementia. Impairment of memory, judgment, attention span, and problem solving skills are followed by severe apraxias and a global loss of cognitive abilities. The condition primarily occurs after age 60, and is marked pathologically by severe cortical atrophy and the triad of senile plaques; neurofibrillary tangles; and neuropil threads. (from Adams et al., Principles of Neurology, 6th ed, pp1049-57)
  • A disabling degenerative disease of the nervous system occurring in middle-aged or older persons and characterized by dementia and failure of memory for recent events, followed by total incapacitation and death. Types of the alzheimer syndrome are differentiated by the age of onset and genetic characteristics. The early onset form (the mean age of the onset of symptoms between the ages of 40 and 60 years) and the late onset form (the onset of symptoms after the age of 60 years). Three forms are identified: ad-1, ad-2, ad-3. Some of the clinical characteristics of the alzheimer syndrome are similar to those of the pick syndrome.
  • A progressive, neurodegenerative disease characterized by loss of function and death of nerve cells in several areas of the brain leading to loss of cognitive function such as memory and language.
  • Alzheimer's disease (ad) is the most common form of dementia among older people. Dementia is a brain disorder that seriously affects a person's ability to carry out daily activities. Ad begins slowly. It first involves the parts of the brain that control thought, memory and language. People with ad may have trouble remembering things that happened recently or names of people they know. A related problem, mild cognitive impairment (mci), causes more memory problems than normal for people of the same age. Many, but not all, people with mci will develop ad. In ad, over time, symptoms get worse. People may not recognize family members or have trouble speaking, reading or writing. They may forget how to brush their teeth or comb their hair. Later on, they may become anxious or aggressive, or wander away from home. Eventually, they need total care. This can cause great stress for family members who must care for them. Ad usually begins after age 60. The risk goes up as you get older. Your risk is also higher if a family member has had the disease. No treatment can stop the disease. However, some drugs may help keep symptoms from getting worse for a limited time. nih: national institute on aging
  • Neurodegenerative disorder of the cns resulting in progressive loss of memory and intellectual functions; begins in the middle or later years; characterized by brain lesions such as neurofibrillary tangles and neuritic plaques.
ICD-10-CM G30.9 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 056 Degenerative nervous system disorders with mcc
  • 057 Degenerative nervous system disorders without mcc

Convert G30.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to G30.9:

ICD-10-CM Codes Adjacent To G30.9
G25.81 Restless legs syndrome
G25.82 Stiff-man syndrome
G25.83 Benign shuddering attacks
G25.89 Other specified extrapyramidal and movement disorders
G25.9 Extrapyramidal and movement disorder, unspecified
G26 Extrapyramidal and movement disorders in diseases classified elsewhere
G30 Alzheimer's disease
G30.0 Alzheimer's disease with early onset
G30.1 Alzheimer's disease with late onset
G30.8 Other Alzheimer's disease
G30.9 Alzheimer's disease, unspecified
G31 Other degenerative diseases of nervous system, not elsewhere classified
G31.0 Frontotemporal dementia
G31.01 Pick's disease
G31.09 Other frontotemporal neurocognitive disorder
G31.1 Senile degeneration of brain, not elsewhere classified
G31.2 Degeneration of nervous system due to alcohol
G31.8 Other specified degenerative diseases of nervous system
G31.81 Alpers disease
G31.82 Leigh's disease
G31.83 Neurocognitive disorder with Lewy bodies

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.