Start an SSRI immediately regardless of patient preference

Because moderate depression warrants pharmacological intervention as the primary treatment modality. Evidence indicates that medication produces faster response rates than psychotherapy in moderate depression, making it the more efficient initial intervention. Patient preferences should be considered in mild depression but become less relevant as severity increases to the moderate range. If the SSRI is effective at eight weeks, psychotherapy can be added later as an adjunct to maintain gains. Current stepped-care guidelines recognize that moderate depression can be effectively treated with either psychotherapy or pharmacotherapy as initial interventions, and patient preference is an important factor at all severity levels.

Recommend guided self-help and active monitoring with reassessment in two weeks, as a PHQ-9 of 12 falls at the lower end of moderate depression where lower-intensity interventions may be sufficient

Guided self-help using validated materials combined with regular monitoring allows the clinician to observe symptom trajectory before committing to higher-intensity treatments. If symptoms have not improved or have worsened at the two-week reassessment, the plan should step up to structured psychotherapy as the next level of intervention. This approach aligns with stepped-care principles of using the least intensive effective intervention initially. While guided self-help and active monitoring are appropriate stepped-care interventions for mild depression, a PHQ-9 of 12 represents moderate depression with functional impairment that typically warrants a higher-intensity initial intervention.

Implement a combined approach of an SSRI plus weekly cognitive behavioral therapy from the outset

Because combination treatment has the highest remission rates for depression across all severity levels. Starting with the most intensive evidence-based intervention ensures the best possible outcome and prevents the need for subsequent treatment modifications. The stepped-care model ultimately aims for remission, and beginning at the highest intensity achieves this goal most efficiently. Combination therapy should be maintained for a minimum of 12 months before considering any step-down in treatment intensity. While combination treatment does demonstrate superior remission rates in some studies, the stepped-care model specifically recommends matching initial intervention intensity to symptom severity.

Initiate an evidence-based psychotherapy such as cognitive behavioral therapy or behavioral activation as the primary intervention, consistent with the patient's preference and the moderate severity level

With structured reassessment planned at six to eight weeks. The treatment plan should include specific measurable goals and defined criteria for stepping up to pharmacotherapy if psychotherapy response is insufficient, such as less than a 50 percent reduction in PHQ-9 score. Concurrent lifestyle interventions including physical activity counseling and sleep hygiene should be incorporated as adjunctive components. This approach respects patient autonomy while maintaining a clear pathway for treatment intensification if needed. This approach exemplifies proper stepped-care planning for moderate depression.