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.
1 The level of ambulance service dispatched to each call (ALS, BLS, SCT) is based on nationally recognized emergency medical service protocols that take into account the patientâs condition, the duration of the injury or illness and the on-going care or monitoring that the patient may require. Each ambulance is appropriately staffed with state-licensed Emergency Medical Technicians (Basic and/or Paramedic) who receive on-going skills development and quality assurance guidance. 2  An Advanced Life Support Ambulance is staffed with at least one Paramedic (EMT-P) and an EMT.