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.
Medicare Part B (Medical Insurance) covers emergency ground ambulance transportation when you need to be transported to a hospital, critical access hospital (CAH), or skilled nursing facility (SNF).our costs in Original Medicare. You pay 20% of the Medicare-approved amount, and the Part B deductible applies. All ambulance suppliers must accept assignment. Medicare's payment may be different if you're transported by a CAH, or by an entity that's owned and operated by a CAH.