Collaborative Care for Depression in Chronic Illness: A Narrative Review

Area of Science:

• Integrative medicine
• Mental health services research
• Chronic disease management

Background:

• Depression frequently co-occurs with chronic medical illnesses.
• This comorbidity is linked to poorer self-management, reduced treatment adherence, increased healthcare use, and higher mortality rates.

Purpose of the Study:

• To review evidence on the Collaborative Care Model's (CoCM) effectiveness for depression in adults with chronic medical conditions.
• Focus on U.S. implementation, policy, and equity considerations from 2000-2025.

Main Methods:

• Conducted a narrative review of randomized controlled trials, pragmatic and implementation studies, systematic reviews, and policy analyses.
• Searched PubMed, PsycINFO, and Scopus databases.
• Synthesized evidence thematically.

Main Results:

• Collaborative care consistently improves depression outcomes in chronic disease populations.
• CoCM is effective in real-world settings utilizing digital registries, telepsychiatry, and population health workflows.
• Implementation is uneven due to workforce and access limitations.

Conclusions:

• Collaborative care is a robust, evidence-based method for integrating depression care into chronic illness management.
• Sustaining effectiveness requires addressing workforce, digital, and equity barriers while preserving core CoCM components.