Depression in the United States remains undertreated because of poor screening, resulting in half of the adult patients not diagnosed with major depression. There are barriers that lead to poor screening for depression, including language, availability of appropriate devices, and ease of use of a validated instrument for screening. The Patient Health Assessment Questionnaire – 9 (PHQ-9) is recommended for screening in primary care; it has been found to be effective and easy-to-use screening device and validated for this purpose, but only in English. Purpose: A quantitative correlational study to demonstrate the concurrent validity of the Spanish PHQ-9 with the English PHQ-9 in screening for depression in Spanish-speaking patients. Method: The study included a cohort of 10 primary care clinics in Dallas/Fort Worth, TX, which during a 6-week period collected data from 397 participants who were bilingual (read and write) in both English and Spanish. This was a quantitative correlational study using Intraclass Correlation Coefficient (ICC) analysis for this study; the researchers examined the concurrent validity of the Spanish version of the PHQ-9 for screening for depression as compared to the English version of the PHQ-9 item by item (paired items), comparing total scores and provisional diagnosis scores. Results: The Spanish version of the PHQ-9 compared to the English version of the PHQ-9 had an ICC [>.9]. For each paired item an ICC [.970], for paired items total scores an ICC [.992], and for paired items provisional diagnosis scores of depression [.981]. Conclusions: The results demonstrated the translated psychometrics of the English PHQ-9 into Spanish are retained and the use of the Spanish version of the PHQ-9 is a valid instrument for assessing depressive symptoms in patients.