We'd love you to write a review of Dr J Maddams - Greensands (Potton) Stevenage – could you? Please add your Dr J Maddams - Greensands (Potton) Stevenage review and help create a directory of recommended gp practices in Stevenage. If Dr J Maddams - Greensands (Potton) Stevenage is owned by you, then claim it today. Claiming your business will enable you to update the tags, address and business description.