Amnestic disorder due to known physiological condition (F04)
The ICD-10 code F04 is used to identify an amnestic disorder caused by a known physiological condition affecting memory. This code specifically addresses memory impairments that originate from organic or physical causes rather than psychological ones.
Amnestic disorder due to known physiological condition covers conditions such as organic memory impairment and organic amnesia of language. Common synonyms like non-alcoholic Korsakoff's psychosis, confabulation, and terms like distortion of memory and delusional memories are all encompassed under this code. These terms help clarify that this ICD-10 code applies when memory loss or false memory formation stems directly from a physical or neurological condition. Medical coders referencing the ICD-10 code for amnestic disorder will find that F04 precisely defines cases where memory problems are not due to alcohol but rather other defined physiological causes, aiding in accurate diagnosis and documentation in neurocognitive disorders.
Mental and behavioural disorders (F01–F99)
Mental disorders due to known physiological conditions (F01-F09)
- F04 Amnestic disorder due to known physiological condition
Amnestic disorder due to known physiological condition (F04)
Instructional Notations
Inclusion Terms
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.
- Korsakov's psychosis or syndrome, nonalcoholic
Code First
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.
- the underlying physiological condition
Type 1 Excludes
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.
Type 2 Excludes
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.
