Unfortunately, the hospital does not have an obligation to notify the next of kin. This is not actionable against the hospital.
Did your husband had no ID on him or any way to contact you? Even so I do not see this as having the damages worthy of a lawsuit as they are under no formal obligation to contact anyone, especially if they have no way to do so.
I'm sorry to hear about this. Did he lose control or did someone hit him? The insurance coverage situation should be reviewed.
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