Guilford Medical Associates. 2703 Henry Street. Greensboro, NC 27405. Phone - (336) 621-8911. Fax - (336) 621-6322. Send a Secure Message. Telephone. Our telephone is answered by a staff member from 8:30 am until 5:00 pm Monday through Friday. When calling, you will be forwarded to the voicemail or whomever you want to reach unless that ....