2027 ICD-10-CM Diagnosis Code F31.78Bipolar disorder, in full remission, most recent episode mixed
ICD-10-CM Codes›F01–F99›F30-F39›F31
- Billable — Valid for Submission
- Chronic Condition
F31.78 is a billable ICD-10-CM diagnosis code for bipolar disorder, in full remission, most recent episode mixed. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 885. Coders also document this condition as bipolar disorder in full remission. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Mental and substance use disorders in remission.
F31.78 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 59 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 58, ESRD (V21) category 58, ESRD (V24) category 59, and RxHCC Part D (V08) category 131 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
F31.78 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bipolar disorder in full remission
- Bipolar type I disorder currently in full remission
- Mixed bipolar affective disorder, in full remission
- Mixed bipolar I disorder
- Mixed bipolar I disorder in full remission
- Mixed bipolar I disorder in remission
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to F31.78: its own notes plus those printed at F31 and Chapter 5. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- bipolar I disorder
- bipolar type I disorder
- manic-depressive illness
- manic-depressive psychosis
- manic-depressive reaction
- seasonal bipolar disorder
- disorders of psychological development
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name F31.78, its category, or a range that includes it.
Excludes1 4
These codes carry an Excludes1 note naming F31.78: they are not reported together with it, unless the two conditions are unrelated.
- F30 Manic episodebipolar disorder (F31.-) names F31.-, which includes this code
- F32 Depressive episodebipolar disorder (F31.-) names F31.-, which includes this code
- F33 Major depressive disorder, recurrentbipolar disorder (F31.-) names F31.-, which includes this code
- R40.1 Stupordepressive stupor (F31.-, F32.-, F33.-) names F31.-, which includes this code
Excludes2 7
These codes carry an Excludes2 note naming F31.78: its condition is not part of those codes, and both may be reported when the patient has both.
- F44.2 Dissociative stupormanic stupor (F30, F31) names F31, which includes this code
- F63.0 Pathological gamblingexcessive gambling by manic patients (F30, F31) names F31, which includes this code
- F63.2 Kleptomaniadepressive disorder with stealing (F31.-, F32.-, F33.-) names F31.-, which includes this code
- F06.3 Mood disorder due to known physiological condition
- F90 Attention-deficit hyperactivity disorders
- F91 Conduct disorders
- F93.0 Separation anxiety disorder of childhood
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disorder (of) See Also: Disease;
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Bipolar Disorder
a major affective disorder marked by severe mood swings (manic or major depressive episodes) and a tendency to remission and recurrence.
Patient EducationClinical
Bipolar Disorder
Bipolar disorder is a mood disorder that can cause intense mood swings:
The full article covers:
- What is bipolar disorder?
- What are the types of bipolar disorder?
- What causes bipolar disorder?
- Who is at risk for bipolar disorder?
- What are the symptoms of bipolar disorder?
- How is bipolar disorder diagnosed?
- What are the treatments for bipolar disorder?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert F31.78 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About F31.78Overview
What is the ICD-10 code for bipolar disorder, in full remission, most recent episode mixed?
The ICD-10-CM code for bipolar disorder, in full remission, most recent episode mixed is F31.78 (sometimes written as F3178). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is F31.78 (Bipolar disorder, currently in remission) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report bipolar disorder, in full remission, most recent episode mixed on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does F31.78 group to?
When bipolar disorder, in full remission, most recent episode mixed is the principal diagnosis on an inpatient stay, it groups to MS-DRG 885 (psychoses), which carries a relative weight of 1.3904. Higher weights mean higher Medicare reimbursement.
Can F31.78 be reported with a code from F30?
Not as a rule. The Excludes1 note at F31, which applies to F31.78, lists "bipolar disorder, single manic episode (F30.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of F31.78?
Under the General Equivalence Mappings, bipolar disorder, in full remission, most recent episode mixed converts to ICD-9-CM 296.66 (bipol I cur mixed remiss). The mapping is a direct match.
Does F31.78 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage. F31.78 mapped to HCC 59 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 58 (Major Depressive/Bipolar/and Paranoid Disorders), ESRD (V21) category 58 (Major Depressive/Bipolar/and Paranoid Disorders), ESRD (V24) category 59 (Major Depressive/Bipolar/and Paranoid Disorders), and RxHCC Part D (V08) category 131 (Bipolar Disorders).
