ICD-10-CM Codes
G00-G99 Diseases of the nervous system
G30-G32 Other degenerative diseases of the nervous system
G31- Other degenerative diseases of nervous system, not elsewhere classified

2020 ICD-10-CM Diagnosis Code G31.09

Other frontotemporal dementia

2016

2017

2018

2019

2020

Billable/Specific Code

G31.09 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2020 edition of ICD-10-CM G31.09 became effective on October 1, 2019.
This is the American ICD-10-CM version of G31.09 - other international versions of ICD-10 G31.09 may differ.

Applicable To

Frontal dementia

The following code(s) above G31.09 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 G31.09:

G00-G99
2020 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
G31
ICD-10-CM Diagnosis Code G31
Other degenerative diseases of nervous system, not elsewhere classified
Type 2 Excludes
- Reye's syndrome (G93.7)
Use Additional
- For codes G31.0-G31.83, G31.85-G31.9, use additional code to identify:
- dementia with behavioral disturbance (F02.81)
- dementia without behavioral disturbance (F02.80)
Other degenerative diseases of nervous system, not elsewhere classified

Approximate Synonyms

Dementia, frontotemporal
Frontotemporal dementia

ICD-10-CM G31.09 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):

056 Degenerative nervous system disorders with mcc
057 Degenerative nervous system disorders without mcc

Convert G31.09 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

Code annotations containing back-references to G31.09:

Code First: F02

ICD-10-CM Diagnosis Code F02
Dementia in other diseases classified elsewhere
Code First
- the underlying physiological condition, such as:
- Alzheimer's (G30.-)
- cerebral lipidosis (E75.4)
- Creutzfeldt-Jakob disease (A81.0-)
- dementia with Lewy bodies (G31.83)
- dementia with Parkinsonism (G31.83)
- epilepsy and recurrent seizures (G40.-)
- frontotemporal dementia (G31.09)
- hepatolenticular degeneration (E83.0)
- human immunodeficiency virus [HIV] disease (B20)
- Huntington's disease (G10)
- hypercalcemia (E83.52)
- hypothyroidism, acquired (E00-E03.-)
- intoxications (T36-T65)
- Jakob-Creutzfeldt disease (A81.0-)
- multiple sclerosis (G35)
- neurosyphilis (A52.17)
- niacin deficiency [pellagra] (E52)
- Parkinson's disease (G20)
- Pick's disease (G31.01)
- polyarteritis nodosa (M30.0)
- prion disease (A81.9)
- systemic lupus erythematosus (M32.-)
- traumatic brain injury (S06.-)
- trypanosomiasis (B56.-, B57.-)
- vitamin B deficiency (E53.8)
Includes
- Major neurocognitive disorder in other diseases classified elsewhere
Type 2 Excludes
- dementia in alcohol and psychoactive substance disorders (F10-F19, with .17, .27, .97)
- vascular dementia (F01.5-)

Diagnosis Index entries containing back-references to G31.09:

Atrophy, atrophic (of)
- sclerosis, lobar (of brain) G31.09
  - with behavioral disturbance G31.09
Dementia (degenerative (primary)) (old age) (persisting) F03.90
ICD-10-CM Diagnosis Code F03.90
Unspecified dementia without behavioral disturbance
Applicable To
Dementia NOS
- frontal (lobe) G31.09
  - with behavioral disturbance G31.09
- frontotemporal G31.09
  - specified NEC G31.09
    - with behavioral disturbance G31.09
  - with behavioral disturbance G31.09

ICD-10-CM Codes Adjacent To G31.09

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 dementia

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 Dementia with Lewy bodies

G31.84 Mild cognitive impairment, so stated

G31.85 Corticobasal degeneration

G31.89 Other specified degenerative diseases of nervous system

G31.9 Degenerative disease of nervous system, unspecified

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

2020 ICD-10-CM Diagnosis Code G31.09

Other frontotemporal dementia

Diseases of the nervous system

Other degenerative diseases of nervous system, not elsewhere classified

Dementia in other diseases classified elsewhere

Unspecified dementia without behavioral disturbance