ICD 10 code for Bipolar Disorder Type 1 most recent episode depressed

When the severity is not documented within the chart note and it is part of the description of the ICD 10 code ex (Bipolar disorder type 1, most recent episode depressed )would you default to the unspecified code? What code would you use for Bipolar disorder type 1, most recent episode depressed?
F31.30 or F31.9.

ICD 10 code for Bipolar Disorder Type 1 most recent episode depressed