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 providers and suppliers must accept the Medicare allowed charge as payment in full and not bill or collect from the beneficiary any amount other than any unmet Part B deductible and the Part B coinsurance amounts. 1  2017 [Excel] 2  2016 [Excel] 3  2015 [Excel]