Is F31 a billable ICD-10-CM code?

No. F31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does F31 sit in the tabular list?

Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Mood [affective] disorders (F30-F39).

What cannot be coded together with F31?

F31 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

F31

F31 — Bipolar disorder

Non-billable headerICD-10-CM

F31 is a non-billable header ICD-10-CM code for bipolar disorder. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

bipolar disorder, single manic episode (F30.-)
major depressive disorder, single episode (F32.-)
major depressive disorder, recurrent (F33.-)

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

cyclothymia (F34.0)

Includes

Conditions this code covers.

bipolar I disorder
bipolar type I disorder
manic-depressive illness
manic-depressive psychosis
manic-depressive reaction
seasonal bipolar disorder

Other codes that can never be billed with F31

These codes carry an Excludes1 note pointing at F31. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading F31 alone.

R40.1Stupor
R44Other symptoms and signs involving general sensations and perceptions
F25Schizoaffective disorders
F20Schizophrenia
F22Delusional disorders
F30Manic episode
F32Depressive episode
F33Major depressive disorder, recurrent

Risk adjustment

F31 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead F31

10 child codes. Green means billable.

Questions about F31

Is F31 a billable ICD-10-CM code?: No. F31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does F31 sit in the tabular list?: Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Mood [affective] disorders (F30-F39).
What cannot be coded together with F31?: F31 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.