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F06.2 vs F20.3

F06.2 (Psychotic disorder with delusions due to known physiological condition) compared with F20.3 (Undifferentiated schizophrenia), from the official CMS tabular data.

Summary

These codes can be reported together when both conditions are documented, because F06.2 lists F20.3 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named.F06.2 is “Psychotic disorder with delusions due to known physiological condition”; F20.3 is “Undifferentiated schizophrenia”.

Registry fact

Can these codes be reported together?

Yes, when both are documented.F06.2 lists F20.3 under Excludes2: “schizophrenia (F20.-)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code. F06.2 carries 1 Excludes1 note and F20.3 carries 6 Excludes1 notes covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.F06.2’s tabular entry: “schizophrenia (F20.-)”. The note covers F20.3.

Official ruleGuide: Excludes1 vs Excludes2

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Is one a parent or header code?

No.Both are billable codes, and neither contains the other.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Informational

Excludes2 relationship

F06.2
Psychotic disorder with delusions due to known physiological condition
↔
F20.3
Undifferentiated schizophrenia

What we found

Yes, when both are documented.F06.2 carries an Excludes2 note covering F20.3: “schizophrenia (F20.-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source / rule

CMS ICD-10-CM tabular instructional notes

Official guidance behind these answers

  • Section I.A.12.b — Excludes2 · applies to: Excludes2

    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.

    ICD-10-CM Official Guidelines FY2026

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

F06.2Psychotic disorder with delusions due to known physiological conditionF20.3Undifferentiated schizophrenia
Billing statusBillableBillable
ClassificationF01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99)F01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99)
DefinitionPsychotic disorder with delusions due to known physiological condition is a billable ICD-10-CM diagnosis code (F06.2).Undifferentiated schizophrenia is a billable ICD-10-CM diagnosis code (F20.3).
Includes
mental disorders due to endocrine disorder
mental disorders due to exogenous hormone
mental disorders due to exogenous toxic substance
mental disorders due to primary cerebral disease
Atypical schizophrenia
Excludes1
unspecified dementia (F03.-)
acute schizophrenia-like psychotic disorder (F23)
brief psychotic disorder (F23)
cyclic schizophrenia (F25.0)
mood [affective] disorders with psychotic symptoms (F30.2, F31.2, F31.5, F31.64, F32.3, F33.3)
schizoaffective disorder (F25.-)
schizophrenic reaction NOS (F23)
Excludes2
alcohol and drug-induced psychotic disorder (F10-F19 with .150, .250, .950)
brief psychotic disorder (F23)
delusional disorder (F22)
schizophrenia (F20.-)
delirium due to known physiological condition (F05)
dementia as classified in F01-F02
other mental disorders associated with alcohol and other psychoactive substances (F10-F19)
post-schizophrenic depression (F32.89)
schizophrenic reaction in:
alcoholism (F10.15-, F10.25-, F10.95-)
brain disease (F06.2)
epilepsy (F06.2)
psychoactive drug use (F11-F19 with .15. .25, .95)
schizotypal disorder (F21)
Code first
the underlying physiological condition
—
Use additional code—
code, if applicable, to identify:
other specified cognitive deficit (R41.84-)

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.

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Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources