What is ICD-10 code F32.A?

F32.A is the ICD-10-CM code for Depression, unspecified. The FY2027 tabular list includes "Depression NOS" and "Depressive disorder NOS" (not otherwise specified) under it. It sits in category F32 (Depressive episode), alongside the single-episode major depressive disorder codes F32.0 to F32.5 and F32.9.

Is F32.A a billable ICD-10-CM code?

Yes, F32.A is a billable code in the FY2027 ICD-10-CM code set (effective October 1, 2026). It has no further subdivisions. Billable does not mean preferred, though; when the record supports a specific depressive diagnosis, the specific code should be reported instead.

Is F32.A the default ICD-10 code for depression?

In the FY2027 ICD-10-CM Alphabetic Index, the main term "Depression" with no further detail points to F32.A, as do "Disorder, depressive" and "Episode, depressive". Detail in the record moves the code elsewhere; for example "Depression, major" points to F32.9 and "Depression, situational" to F43.21.

What is the difference between F32.A and F32.9?

F32.9 is Major depressive disorder, single episode, unspecified; the tabular list includes "Major depression NOS" under it. It records a major depressive episode whose severity is not documented. F32.A is broader, for depression documented without enough detail to say whether criteria for a major depressive episode are met.

When should F32.A be used?

The ICD-10-CM Official Guidelines say codes titled "unspecified" are for use when the information in the medical record is insufficient to assign a more specific code. F32.A fits an encounter where clinically significant depression is documented but the type, episode count, or severity has not yet been established, for example at a first visit before a full assessment.

What should be ruled out before coding F32.A?

Category F32 carries an Excludes1 note for bipolar disorder (F31.-), manic episode (F30.-), and recurrent depressive disorder (F33.-), and an Excludes2 note for adjustment disorder (F43.2). Ask about past mania or hypomania and past depressive episodes, and whether the low mood follows an identifiable stressor. Depression due to a medical condition is coded in F06.3.

What scale is used to screen when F32.A is coded?

The PHQ-9 is the common choice. In its validation study, a score of 10 or higher had 88% sensitivity and 88% specificity for major depression, and scores of 5, 10, 15, and 20 marked mild, moderate, moderately severe, and severe depression (Kroenke et al., 2001). A score supports, but does not make, the diagnosis.

Can a client stay on F32.A long term?

The guidelines ask that each encounter be coded to the level of certainty known at that encounter. F32.A is appropriate while the type of depression is unclear, but as assessment and repeated measurement add detail, the record should support a more specific code, such as an F32 or F33 code with severity. Documenting why the type is still unclear keeps the code choice defensible.

How is depression treated?

According to the Merck Manual, mild depression may be treated with general support and psychotherapy, and moderate to severe depression with medication, psychotherapy, or both. SSRIs are often the first medications chosen. Screening tools such as the PHQ-9 cannot be used alone for diagnosis.

F32.AICD-10-CMDepression, Unspecified

Official ICD-10-CM descriptor: Depression, unspecified · Category header, not billable: use a more specific code

Clinically significant depression documented without enough information to assign a more specific depressive disorder code. The FY2027 tabular list includes "Depression NOS" and "Depressive disorder NOS" under this code.

F32.A at a glance

ICD-10-CM F32.A
Depression
Category header, not billable: use a more specific code
Recommended screener
Patient Health Questionnaire-9 (PHQ-9)
View scale
Billing the screening
In the US, administering and scoring the scale usually bills under CPT 96127; the session itself under 90791 or 90834/90837. Coverage varies by payer.

DSM-5-TR diagnostic criteria summary

F32.A is a residual code rather than a criteria set of its own. It is used when:

Depressive symptoms are clinically significant, causing distress or impairment in daily functioning.
The record does not support a more specific code, such as a major depressive episode with known severity (F32.0 to F32.5), recurrent major depressive disorder (F33.-), or persistent depressive disorder (F34.1).
Other causes have been considered, including depression due to a medical condition (F06.3-) and substance- or medication-induced depression.

DSM-5-TR describes other specified and unspecified depressive disorders as presentations with symptoms characteristic of a depressive disorder that cause clinically significant distress or impairment but do not meet full criteria for a specific one. The FY2027 ICD-10-CM tabular list includes "Depression NOS" and "Depressive disorder NOS" under F32.A. The ICD-10-CM Official Guidelines state that unspecified codes are acceptable, even necessary, when they most accurately reflect what is known at the encounter.

Source: Centers for Disease Control and Prevention / National Center for Health Statistics. ICD-10-CM Tabular List, Alphabetic Index, and Official Guidelines for Coding and Reporting, FY2027, Sections I.A.9 and I.B.18; Coryell, W. (2026). Depressive disorders. Merck Manual Professional Edition.

Differential diagnosis

Major Depressive Disorder, Single Episode (F32.0 to F32.5, F32.9), when a major depressive episode is documented; see F32.1 (moderate).
Major Depressive Disorder, Recurrent (F33.-), when there has been at least one prior episode.
Persistent Depressive Disorder (F34.1), depressive symptoms lasting 2 years or more; the tabular list includes "Dysthymia" and "Persistent depressive disorder" under F34.1.
Bipolar I (F31.-) and Bipolar II (F31.81), excluded from F32 by an Excludes1 note.
Unspecified Mood Disorder (F39), when it is unclear whether the presentation is depressive or bipolar.
Adjustment Disorder with Depressed Mood (F43.21) or with Mixed Anxiety and Depressed Mood (F43.23), low mood in response to an identifiable stressor.
Mood Disorder Due to Known Physiological Condition (F06.3-), for example after a stroke or with hypothyroidism.

Common comorbidities

Depression often co-occurs with anxiety. Screen for anxiety alongside depression with the GAD-7, ask about substance use and suicide risk, and code each condition that meets criteria. See the PHQ-9 vs GAD-7 comparison for overlapping anxious-depressive presentations.

Documentation patterns

Initial visit: PHQ-9 score, the depressive symptoms observed, history of prior episodes and of mania or hypomania, what has been ruled out (medical, substance), and why a specific depressive diagnosis cannot yet be made.
Follow-up visits: re-administer the PHQ-9 and record new detail (symptom count, duration, episode history) that may support moving to a specific F32 or F33 code.

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Frequently asked questions

What is ICD-10 code F32.A?
F32.A is the ICD-10-CM code for Depression, unspecified. The FY2027 tabular list includes "Depression NOS" and "Depressive disorder NOS" (not otherwise specified) under it. It sits in category F32 (Depressive episode), alongside the single-episode major depressive disorder codes F32.0 to F32.5 and F32.9.
Is F32.A a billable ICD-10-CM code?
Yes, F32.A is a billable code in the FY2027 ICD-10-CM code set (effective October 1, 2026). It has no further subdivisions. Billable does not mean preferred, though; when the record supports a specific depressive diagnosis, the specific code should be reported instead.
Is F32.A the default ICD-10 code for depression?
In the FY2027 ICD-10-CM Alphabetic Index, the main term "Depression" with no further detail points to F32.A, as do "Disorder, depressive" and "Episode, depressive". Detail in the record moves the code elsewhere; for example "Depression, major" points to F32.9 and "Depression, situational" to F43.21.
What is the difference between F32.A and F32.9?
F32.9 is Major depressive disorder, single episode, unspecified; the tabular list includes "Major depression NOS" under it. It records a major depressive episode whose severity is not documented. F32.A is broader, for depression documented without enough detail to say whether criteria for a major depressive episode are met.
When should F32.A be used?
The ICD-10-CM Official Guidelines say codes titled "unspecified" are for use when the information in the medical record is insufficient to assign a more specific code. F32.A fits an encounter where clinically significant depression is documented but the type, episode count, or severity has not yet been established, for example at a first visit before a full assessment.
What should be ruled out before coding F32.A?
Category F32 carries an Excludes1 note for bipolar disorder (F31.-), manic episode (F30.-), and recurrent depressive disorder (F33.-), and an Excludes2 note for adjustment disorder (F43.2). Ask about past mania or hypomania and past depressive episodes, and whether the low mood follows an identifiable stressor. Depression due to a medical condition is coded in F06.3.
What scale is used to screen when F32.A is coded?
The PHQ-9 is the common choice. In its validation study, a score of 10 or higher had 88% sensitivity and 88% specificity for major depression, and scores of 5, 10, 15, and 20 marked mild, moderate, moderately severe, and severe depression (Kroenke et al., 2001). A score supports, but does not make, the diagnosis.
Can a client stay on F32.A long term?
The guidelines ask that each encounter be coded to the level of certainty known at that encounter. F32.A is appropriate while the type of depression is unclear, but as assessment and repeated measurement add detail, the record should support a more specific code, such as an F32 or F33 code with severity. Documenting why the type is still unclear keeps the code choice defensible.
How is depression treated?
According to the Merck Manual, mild depression may be treated with general support and psychotherapy, and moderate to severe depression with medication, psychotherapy, or both. SSRIs are often the first medications chosen. Screening tools such as the PHQ-9 cannot be used alone for diagnosis.

Sources

1. 1.Centers for Disease Control and Prevention, National Center for Health Statistics. (2026). ICD-10-CM Tabular List of Diseases and Injuries, FY2027 (effective October 1, 2026).
2. 2.Centers for Disease Control and Prevention, National Center for Health Statistics. (2026). ICD-10-CM Index to Diseases and Injuries, FY2027.
3. 3.Centers for Disease Control and Prevention, National Center for Health Statistics. (2026). ICD-10-CM Official Guidelines for Coding and Reporting, FY2027, Sections I.A.9 and I.B.18.
1. 4.Kroenke, K., Spitzer, R. L., & Williams, J. B. W. (2001). The PHQ-9: Validity of a brief depression severity measure. Journal of General Internal Medicine, 16(9), 606–613.
2. 5.Coryell, W. (2026). Depressive disorders. Merck Manual Professional Edition.