2026 ICD-10-CM Diagnosis Code F04Amnestic disorder due to known physiological condition
ICD-10-CM Codes›F01–F99›F01-F09›F04
- Billable — Valid for Submission
- Not Chronic
F04 is a billable ICD-10-CM diagnosis code for amnestic disorder due to known physiological condition. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neurocognitive disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Amnestic disorder
- Confabulation
- Delusional memories
- Distortion of memory
- Fantastical confabulation
- Momentary confabulation
- Non-alcoholic Korsakoff's psychosis
- Organic amnesia of language
- Organic memory impairment
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Korsakov's psychosis or syndrome, nonalcoholic
Code First
- the underlying physiological condition
Type 1 Excludes
Type 2 Excludes
- alcohol-induced or unspecified Korsakov's syndrome F10.26 F10.96
- Korsakov's syndrome induced by other psychoactive substances F13.26 F13.96 F19.16 F19.26 F19.96
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Amentia - See: Disability, intellectual;
- Meynert's (nonalcoholic) - F04
- Disease, diseased - See Also: Syndrome;
- Korsakoff's (nonalcoholic) - F04
- Disorder (of) - See Also: Disease;
- Meynert's amentia (nonalcoholic) - F04
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Amentia
- Meynert's (nonalcoholic)
- Amnes(t)ic syndrome (post-traumatic)
- Disease, diseased
- Korsakoff's (nonalcoholic)
- Disorder(of)
- amnesic, amnestic
- due to (secondary to) general medical condition
- Korsakoff's(Wernicke) disease, psychosis or syndrome (alcoholic)
- nonalcoholic
- Meynert's amentia(nonalcoholic)
- Psychosis, psychotic
- Korsakoff's, Korsakov's, Korsakow's (nonalcoholic)
- Syndrome
- Korsakoff (-Wernicke) (nonalcoholic)
- Syndrome
- organic
- amnesic (not alcohol- or drug-induced)
- Syndrome
- Wernicke-Korsakoff (nonalcoholic)
- Toxemica cerebropathia psychica(nonalcoholic)
- Wernicke-Korsakoff's syndrome or psychosis(alcoholic)
- nonalcoholic
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Memory
Every day, you have different experiences and you learn new things. Your brain cannot store all of that information, so it has to decide what is worth remembering. Memory is the process of storing and then remembering this information. There are different types of memory. Short-term memory stores information for a few seconds or minutes.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert F04 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About F04Overview
Is F04 (Amnestic disorder due to known physiological condition) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report amnestic disorder due to known physiological condition on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What is the ICD-9 equivalent of F04?
Under the General Equivalence Mappings, amnestic disorder due to known physiological condition converts to ICD-9-CM 294.0 (amnestic disord oth dis). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
