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.
Ambulance services are separately reimbursable only under Part B Medicare does not cover all health care services. Health care services not covered by Medicare include, but are not limited to: alternative medicine most care received outside of the United States cosmetic surgery most dental care hearing aids personal care or custodial care