Some falls are a result of interactions or physical contact including collisions with other individuals. For instance, a fall due to having an interaction with another person is coded W18.40XA and is likely to take place in busy places. W03.XA is relevant when an individual erodes or nudges another person and the interaction results in a fall. https://prospecthealthcaresolutions.com/icd-10-code-for-ground-level-fall/