A bstract Purpose The impact of disruption to the care of non-coronavirus disease (COVID) patients (COVID collateral damage syndrome-CCDS) is largely unknown in resource-limited settings. We investigated CCDS as perceived by healthcare workers (HCWs) providing acute and critical care services in India. Materials and methods A clinician and nurse codesigned and validated an internet-based survey, which was disseminated to HCWs using a multiple frame sampling technique. Results Responses were received from 468 HCWs (completion rate 84%); at the time of the survey, 48% were working in critical care, 41% aged 30–40 years, and 53% represented public institutions. Respondents perceived a decrease in service utilization and disruption to time-sensitive acute interventions (60.1% and 40.8%, respectively), with fear of infection (score, 63.0; standard deviation (SD), 31.8) and restrictions due to lockdown (61.4; SD 32.5) being cited as the causes of service disruption. Being overwhelmed or lack of protective equipment was perceived to contribute less to CCDS. Insistence on COVID test results X 2 ( p = 0.02) and duty-avoidance ( p < 0.01) was perceived as significant causes for CCDS by HCWs from private hospitals and those in leadership roles, respectively. Conclusions Fear of infection and the effect of lockdown were perceived as important contributors to CCDS resulting in disruption to services and decreased service utilization. Perceptions were influenced by HCWs’ role and hospital organizational structure. How to cite this article Tripathy S, Vijayaraghavan BKT, Panigrahi MK, Shetty AP, Haniffa R, Mishra RC, et al . Collateral Impact of the COVID-19 Pandemic on Acute Care of Non-COVID Patients: An Internet-based Survey of Critical Care and Emergency Personnel. Indian J Crit Care Med 2021;25(4):374–381.