2027 ICD-10-CM Diagnosis Code G30Alzheimer's disease

ICD-10-CM Codes›G00–G99›G30-G32›G30

ICD-10-CM G30
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G30 is a non-billable ICD-10-CM category code for Alzheimer's disease, so it cannot be submitted on claims. Use a more specific code from this category instead, such as G30.0, G30.1, G30.8, and G30.9.

Code Identity

ICD-10-CM Code
G30
Billable Status
No — Non-Billable Category
Code Describes
Alzheimer's disease
Short Description
Alzheimer's disease
Same as the full description in the CMS dataset.
Chapter
G30-G32
Other degenerative diseases of the nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG30-G32Other degenerative diseases of the nervous system
CategoryG30Alzheimer's disease
This CodeG30Alzheimer's disease

Specific Coding for Alzheimer's diseaseOverview

Non-specific codes like G30 require more characters. Use one of these billable codes instead:

  • Use G30.0 for Alzheimer's disease with early onset

  • Use G30.1 for Alzheimer's disease with late onset

  • Use G30.8 for Other Alzheimer's disease

  • Use G30.9 for Alzheimer's disease, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G30: its own notes plus those printed at Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

  • Alzheimer's dementia senile and presenile forms

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • senile degeneration of brain NEC (G31.1)
  • senile dementia NOS (F03.-)
  • senility NOS (R41.81)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • 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)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name G30, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming G30: they are not reported together with it, unless the two conditions are unrelated.

  • G31.1 Senile degeneration of brain, not elsewhere classified
    Alzheimer's disease (G30.-)

Code First 3

These codes say to code first a condition named in the note, and G30 is one of the conditions named.

  • F02 Dementia in other diseases classified elsewhere
    Alzheimer's (G30.-)
  • F06.7 Mild neurocognitive disorder due to known physiological condition
    Alzheimer's disease (G30.-)
  • Z91.83 Wandering in diseases classified elsewhere
    Alzheimer's disease (G30.-)

Clinical InformationClinical

  • Alzheimer Disease

    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)

Patient EducationClinical

Alzheimer's Disease

Alzheimer's disease (AD) is the most common form of dementia among older people. Dementia is a brain disorder that seriously affects thinking and memory skills. If you have AD, it can impair your ability to reason or learn new skills until it becomes difficult to complete daily activities.

The full article covers:

  • What is Alzheimer's disease?
  • What are the symptoms of Alzheimer's disease?
  • Who is more likely to develop Alzheimer's disease?
  • How is Alzheimer's disease diagnosed?
  • What are the treatments for Alzheimer's disease?
  • Can Alzheimer's disease be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G30Overview

What is the ICD-10 code for Alzheimer's disease?

G30 is the ICD-10-CM category for Alzheimer's disease, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is G30 (Alzheimer's disease) a billable code?

No. This is a category header that groups the codes for Alzheimer's disease, and headers cannot be submitted on claims. Claims for Alzheimer's disease need a more specific code from this category, such as G30.0, G30.1, and G30.8.

Can G30 be reported with G31.1?

Not as a rule. The Excludes1 note on G30 lists "senile degeneration of brain NEC (G31.1)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does G30 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: code, if applicable, to identify: delirium, if applicable (F05); 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); and 2 more listed in the Instructional Notes section. The additional code is reported after G30.