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.
Covered entities include: health care clearing houses; health plans; and health care providers who transmit any health information electronically in connection with certain transactions. Although this definition can be somewhat difficult to apply, generally speaking, ambulance services are covered entities. However, most dispatchers, such as 911 dispatchers, are not because they do not engage in covered electronic transactions, such as directly billing insurers for services or transmitting healthcare enrollment information.