Do I need a healing abutment before crown placement after implant?

The oral surgeon who placed the implant is usually the one who will uncover the implant and place the healing abutment. The healing abutment is in place for 1-2 weeks to allow the gum tissue to heal so you can get the best fitting abutment and crown from your general dentist. I understand the desire to get the crown done ASAP, those flippers are no fun, but it is better to wait 2 extra weeks and make sure it's done right. 
Best of luck!

healing abutment is not big issue. its for 7 to 15 day for for proper healing of soft tissue around implant side. after 15 days he will replay healing abutment with regular one and will give crown on that.

If the implant is completely covered, it will need to be uncovered to place the abutment. The healing cap is usually placed for 2 weeks to allow the gums to heal after uncovering the implant. Then when impressions or scans are taken for the crown, the gums are healthy and stable. You've waiting 6 months. Another 2 weeks to make sure everything is done properly isn't too big of a deal. 

Healing abutment is always good. This way the gums take the proper shape for the final crown. Also, easier for your dentist