You don't need a Med card till 26001 GVWR Class B CDL or carrying placard hazmat. Up to 26001 you only need a Class C DL
The FMCSA will strongly disagree with you on that. If you drive a vehicle that is 10,001 pounds or more you need to have a medical card, but you won't also need a CDL until you hit 26,001 pounds, unless you carry hazardous material which requires placards.
Medical
All commercial drivers of vehicles in interstate commerce with a maximum gross vehicle weight rating of over 10,000 pounds (4,536 kilograms) are required to obtain and maintain a valid Medical Examiner's Certificate (ME Certificate).
The
CDL Classes are:
Class A: Any combination of vehicles which has a gross combination weight rating or gross combination weight of 11,794 kilograms or more (26,001 pounds or more) whichever is greater, inclusive of a towed unit(s) with a gross vehicle weight rating or gross vehicle weight of more than 4,536 kilograms (10,000 pounds) whichever is greater.
Class B: Any single vehicle which has a gross vehicle weight rating or gross vehicle weight of 11,794 or more kilograms (26,001 pounds or more), or any such vehicle towing a vehicle with a gross vehicle weight rating or gross vehicle weight that does not exceed 4,536 kilograms (10,000 pounds).
Class C: Any single vehicle, or combination of vehicles, that does not meet the definition of Class A or Class B, but is either designed to transport 16 or more passengers, including the driver, or is transporting material that has been designated as hazardous under 49 U.S.C. 5103 and is required to be placarded under subpart F of 49 CFR Part 172 or is transporting any quantity of a material listed as a select agent or toxin in 42 CFR Part 73.