The soaring loss costs in New York PIP claims have led many observers to seek explanations for the deteriorating performance of the no-fault system in the state. This report details the claiming behavior of claimants in New York and especially the New York City metropolitan area -- showing higher incidence of sprains and strains, higher use of some medical professionals and procedures, and higher rates of attorney involvement. This aggregate behavior suggests that fraud and buildup in auto injury claims may well be a factor in the recent New York experience.