ICD-10-CM F31.9 is the diagnosis code for Bipolar disorder, unspecified. This code falls under the section "Mood [affective] disorders" within Chapter 5 — Mental, Behavioral and Neurodevelopmental disorders (F01-F99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where F31.9 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, F31.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
F31.9 is the ICD-10-CM diagnosis code for "Bipolar disorder, unspecified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of F31.9 is F31 ("Bipolar disorder"). F31.9 provides a more specific classification within this category.
F31.9 is located in Section F30-F39 — "Mood [affective] disorders" within Chapter 5 of the ICD-10-CM Tabular List.
Use F31.9 when the patients documented diagnosis matches "Bipolar disorder, unspecified" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Bipolar disorder, unspecified is F31.9.
Yes, F31.9 can be used as a primary diagnosis code since it is billable and specific.
F31.9 is in Chapter 5 of the ICD-10-CM Tabular List.
Yes, F31.9 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.