For AIQ registration for neet 2019,Does private colleges are also mentioned there?

Private Medical Colleges do not participate in All India Counselling and the seats are filled through State Counselling alone. And for appearing for State Counselling you need to hold the domicile of that particular State. Or else the only other option is through Management Quota.Under All India Quota, All the 15% of All India Quota Seats except for Jammu and Kashmir, 100% Seats at Deemed and Central Universities, IP Quota seats in ESIC Colleges, Seats at AFMC are filled by DGHS. The 85% State Quota and Private Colleges are filled by the respective State Authorities.

Dear Sir / Ma'm, besides the government colleges, you must have seen an option of deemed universitites. They are all the private colleges which offer MBBS and BDS courses all over India in the 15% All India Quota counselling. You have to apply there too, in order to be able to take part in their counselling.