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.
Transportation for dialysis treatment. In some cases, Medicare may cover ambulance transportation when you have End-Stage Renal Disease (ESRD), need dialysis, and need ambulance transportation to or from a dialysis facility. If youâre in a Medicare Advantage Plan (Part C), the plan may cover some non-ambulance transportation to dialysis centers and doctors. Call your plan for more information. Get your plan's contact information from a Personalized Search (under General Search), or search by plan name.