F31.77Bipolar disorder, in partial remission, most recent episode mixed

F31.77 is the ICD-10-CM diagnosis code for bipolar disorder, in partial remission, most recent episode mixed. It belongs to category F31 (bipolar disorder), block F30-F39 (mood [affective] disorders) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within F31.7 (bipolar disorder, currently in remission), F31.77 is specifically for bipolar disorder, in partial remission, most recent episode mixed. Related codes cover most recent episode unspecified (F31.70), in partial remission, most recent episode hypomanic (F31.71), in full remission, most recent episode hypomanic (F31.72), in partial remission, most recent episode manic (F31.73), in full remission, most recent episode manic (F31.74), in partial remission, most recent episode depressed (F31.75), in full remission, most recent episode depressed (F31.76) and in full remission, most recent episode mixed (F31.78).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 885 (Psychoses, relative weight 1.3901), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 296.65 (bipolar I disorder, most recent episode (or current) mixed, in partial or unspecified remission).