It's all about non-urgent (and higher margin) procedures getting squeezed out as all resources are dedicated to treating virus patients.
But it also adds a huge element of uncertainty that even HCA management can't anticipate. For example, what are the added costs of protecting other patients and staff from virus transmission? How about the possibility that staff will catch the virus and be unavailable for long periods of time?
This morning HCA announced they have drawn a $2B credit line and suspended share repurchases.