Untreated peripartum depression (PD) affects one in seven women and is associated with negative maternal outcomes. This retrospective observational study used health record data from an integrated health system in Texas to assess the extent to which time to access reproductive psychiatry influences the mental health of peripartum women. Women with at least one screening for depression symptoms conducted in obstetric or pediatric settings between May 2014 and October 2019 and subsequently seen by the reproductive psychiatry clinic (n=490) were included. Descriptive and inferential statistics were used to assess timing and factors related to psychiatry follow-up. Findings from this study demonstrated that the average time between a positive screen and a psychiatry assessment was 5 weeks. At psychiatry referral appointments, 85% of women continued to screen positive for PD symptoms. Depression symptom scores at the psychiatry appointment were significantly higher than scores precipitating the referral (p = 0.002). Wait time between initial positive screen and referral appointment was positively correlated with clinically meaningful increases in depression symptom scores (p < 0.001). Each week spent waiting for an appointment produced a 13% increase in odds of clinically meaningful worsening of PD scores and 9% increase in odds of developing new self-harm ideation. Given the findings that a longer period between primary care referral and subspecialty appointment has a negative impact on the mental health of women, this study supports the need for earlier psychiatric assessment to minimize decompensation. Expansion of reproductive psychiatry services are needed to support peripartum women and improve maternal outcomes.