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Case Study - Depression Screening Gap 2026.

Most PCP practices that embed PHQ-9 screening into their Annual Wellness Visit workflow assume they've solved depression screening. The data tells a different story.

We analyzed 24 months of encounter data, screening records, diagnosis codes, and medication histories across a 40,000-patient multi-site PCP network. Despite a fully implemented screening protocol, only 7.2% of attributed patients had received a PHQ-9 in the prior 12 months. 93% had never been screened — not once.

This insight brief maps the full screening funnel, quantifies the downstream action gap, identifies the structural bottleneck, and models what a proactive telephonic outreach program could shift within 12 months.

A data analysis of 40,000 primary care patients reveals why PHQ-9 screening at Annual Wellness Visits is only reaching 7% of the panel — and where the real behavioral health gap sits.

What's inside this report

7% effective screening rate across a 40,000-patient panel — despite a fully implemented PHQ-9 workflow at every Annual Wellness Visit

3,100+ patients on psychiatric medications and 2,100+ with BH diagnoses who had never been screened with a PHQ-9

58% of patients who screened positive had no diagnosis or treatment documented afterward — screening without a downstream workflow

Modeled 12-month impact: proactive telephonic outreach projected to move screening rates from 7% to 25–35% and identification by 4–6x

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