Do we need a DOT Medical Card for these trucks?

[FATCAT]

My machanic buddy and I were talking about the new truck I have on order and he said that at minimum, I will need to get a DOT Medical card to drive a 3500 or bigger truck, even though I would not need to get a CDL B for the new 4500 I have on order.

I checked the NH DMV website and found this Federal regulation:

"Requirements for Medical Certification
In the interest of public safety on the highways, Federal Motor Carrier Safety Administration (FMCSA) regulations require interstate commercial drivers to be medically fit to operate their vehicles safely and competently. You are required to have a physical exam and carry a U.S. Department of Transportation (DOT) medical certificate if:

You operate a motor vehicle with a gross vehicle weight rating (GVWR) or gross combination weight rating (GCWR) or gross vehicle weight (GVW) or gross combination weight (GCW) of 4,536 kilograms (10,001 pounds) or more in interstate commerce.
You operate a motor vehicle designed or used to transport more than 15 passengers, including the driver, in interstate commerce.
You operate a motor vehicle designed or used to transport between nine and 15 passengers, for direct compensation, beyond 75 air miles from your regular work-reporting location, in interstate commerce.
You transport hazardous materials in quantities requiring placards, in interstate commerce.
You must carry a current copy of your medical examination certificate with you when you drive. Residents of Mexico or Canada who drive in the United States can be certified by doctors in their countries, provided they meet the U.S. requirements."

Now the first statement about the 10,001 lbs or more in INTERSTATE COMMERCE ... to me says if I'm not traveling across state lines for work (and this is my personal truck), I don't need to get a DOT Medical card.

Am I correct?

I think I'll call the doctor anyway and get one just in case.