F31.81 ICD-10-CM Code: Bipolar II disorder
F31.81 is the billable ICD-10-CM code for “Bipolar II disorder” in the FY 2027 U.S. code set, effective Oct 1, 2026.
Official description
F31.81Bipolar II disorder
ICD-10-CM diagnosis code · United States clinical modification
Where F31.81 sits
- 1
Chapter 5
Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
- 2
Section
Mood [affective] disorders (F30-F39)
- 3
Category F31
Bipolar disorder
- 4
Subcategory F31.8
Other bipolar disorders
- 5
Code F31.81
Bipolar II disorder
Notes for this code
Inclusion terms
- Bipolar disorder, type 2
Code first
No “code first” instruction is listed for F31.81.
Use additional code
No “use additional code” instruction is listed for F31.81.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for F31.81.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for F31.81.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code F31.81 mean?
F31.81 is the FY 2027 U.S. ICD-10-CM code for “Bipolar II disorder.”
Is F31.81 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, F31.81 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is F31.81 located in ICD-10-CM?
F31.81 is listed in Chapter 5, Mental, Behavioral and Neurodevelopmental disorders (F01-F99), within Mood [affective] disorders (F30-F39) (F30–F39), under category F31, Bipolar disorder and subcategory F31.8, Other bipolar disorders.
What coding notes are listed for F31.81?
Its listed inclusion terms are Bipolar disorder, type 2. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.