Type-based Bipolar Disorder segmentation distinguishes Bipolar I, Bipolar II, and cyclothymic presentations, each commanding a discrete share of the 2023 global market valued at USD 5.4 billion. Bipolar I, defined by ≥1 manic episode, drives 61 % of prescription volume because severe mania mandates continuous mood-stabilizer and second-generation antipsychotic use, generating the highest per-patient annual cost (USD 3.1 k). Bipolar II, characterized by recurrent depression plus hypomania, represents 28 % of the treated pool; although mania-related hospitalizations are fewer, chronic depressive dominance extends therapy duration and fuels demand for adjunctive antidepressants and atypical antipsychotics with antidepressant properties. Cyclothymic disorder, affecting 11 % of diagnosed adults, is gaining recognition owing to refined DSM-5-TR criteria; while per-case expenditure is lowest, rising diagnosis rates translate into incremental uptake of mood stabilizers and emerging digital therapeutics, expanding the market taxonomy without cannibalizing revenues from severe subtypes.