Purpose: Nursing informatics competency is used to manage and improve the delivery of safe, high-quality, and efficient healthcare services
in accordance with best practices and professional and regulatory standards. This study examined the relationship between nursing
informatics competency (NIC), nursing care left undone, and nurse reported quality of care (NQoC) and nursing productivity. A path model
for their effects on nursing productivity among clinical nurses was also established. Methods: Data were collected using structured questionnaires
answered by 192 nurses working in a tertiary hospital located in J city, Korea, and analyzed using SPSS/WIN 23.0 and AMOS 21.0
program. Results: The fit indices of the alternative path model satisfied recommended levels χ2 = .11 (p = .741), normed χ2 (χ2/df) = .11,
SRMR = .01, RMSEA = .00, GFI = 1.00, NFI = 1.00, AIC = 18.11. Among the variables, NIC (β = .44, p < .001), NQoC (β = .35, p < .001) had a
direct effect on nursing productivity. Due to the mediating effect of NQoC on the relationship between NIC and nursing productivity, the
effect size was .14 (95% CI .08~.24). Meanwhile, nursing care left undone through NQoC in the relationship between NIC and nursing productivity,
has a significant mediation effect (estimate .01, 95% CI .00~.03). The explanatory power of variables was 44.0%. Conclusion: Education
and training for enhancing NIC should be provided to improve nursing productivity, quality of care and to reduce missed nursing
care. Furthermore, monitoring the quality of nursing care and using it as a productivity index is essential.