Delusional disorders (F22)
F22 codes are used to classify delusional disorders, a group of mental health conditions where a person holds fixed false beliefs despite evidence to the contrary. These disorders fall under the broader category of schizophrenia spectrum psychotic disorders and include various specific types of delusions.
The ICD-10 code for delusional disorders, F22, covers a wide range of delusional conditions, such as persecutory (paranoid) delusions, grandiose delusions, erotomanic delusions, and somatic delusions (false beliefs about bodily functions). Synonyms like paranoid disorder, delusion of control, and delusions of infestation all correspond to this code, assisting coders in accurately identifying diagnoses based on terminology used in patient records. This code also encompasses less common delusions, including Cotard's syndrome (belief that one is dead), delusional jealousy, and mood-congruent or -incongruent delusions, widening its use for complex clinical presentations. Medical coders use F22 to document persistent false beliefs that do not meet criteria for schizophrenia but significantly impact patients' perception of reality.
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.
- Delusional dysmorphophobia
- Involutional paranoid state
- Paranoia
- Paranoia querulans
- Paranoid psychosis
- Paranoid state
- Paraphrenia (late)
- Sensitiver Beziehungswahn
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.
- mood [affective] disorders with psychotic symptoms F30.2 F31.2 F31.5 F31.64 F32.3 F33.3
- paranoid schizophrenia F20.0
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.
