N.J. Stat. Ann. § 26:2J-34

4. Notwithstanding any other provision of law to the contrary, a medicare supplement contract or evidence of coverage shall not deny medicare supplement health care services for losses incurred more than six months from the effective date of enrollment for a preexisting condition. The contract or evidence of coverage shall not define a preexisting condition more restrictively than a condition for which medical advice was given or treatment was recommended by or received from a physician within six months of the effective date of enrollment.