a fingernail has a hardness of 2; a copper penny, about 3; a knife blade, 5; window glass, 5.5; and a steel file, 6.5. Here are the Mohs scale ratings for 144 types of gemstones:
Background: In the last Ambulance Open Door Forum (April 15, 2009), CMS received questions about how to correctly inform beneficiaries of potential liability for ambulance services that Medicare may not cover.he Medicare law defines the ambulance service benefit as an â ambulance service where the use of other methods of transportation is contraindicated by the individual's condition .â That is, the patientâs medical condition is such that transportation by ambulance is a clinical medical necessity.
According to a 2012 report by the U.S. Government Accountability Office, an ambulance ride can range from $224 to $2,204 per transport for Medicare beneficiaries. Our insurance expert explains that some of the variability in ambulance costs is due to the fact that its an on-demand business that always has to be ready.