Referee Andre Marriner has been confirmed as the match official for the tie.
Mr Marriner officiated City's 2-1 victory at Milton Keynes Dons earlier this season. He also took charge of the 2013 F.A Cup Final when Wigan Athletic shocked Manchester City to win the competition for the first time in their history.
Looking towards the match, Parkinson will have to check again on the fitness of attacker Billy Clarke.
Clarke stepped up his recovery from a knee injury when he travelled with the squad on their way to last Saturday's league match at Yeovil Town.
The squad stopped off at the Bristol Academy of Sport in Filton on the Friday to train before heading down to their overnight hotel base. While Clarke didn't train with the rest of the squad, he was able to take part in some intensive running drills with members of the club's physio team.
Parkinson will now be keen to find out if the creative forward has any realistic chance of being part of his plans for the trip to Chelsea.
The City chief may also have to have a quick check on the fitness of Andrew Davies as well after the imposing central defender suffered a slight tweak in the latter stages of the Yeovil game.
Matthew Dolan is certainly expected to travel after being named on the bench at Yeovil following his recovery from a recent hamstring problem.
The futures of Andy Halliday and Francois Zoko remain up in the air, however, after they both returned to their parent clubs following the expiry of their loan periods last Saturday.
Parkinson admitted after the Yeovil game that he was keen to keep both of them at the football club but no deal is in place as of yet for either player ahead of the Chelsea tie.
With fellow loan player Jordan Pickford again unavailable to Parkinson for an F.A Cup tie, Ben Williams, who verbally agreed a new eighteen-month contract last week, is likely to keep goal once again for his ninth appearance of the season.
Despite being charged by The Football Association after being sent to the stands during the Millwall cup replay last Wednesday, both Parkinson and Steve Parkin will be available to sit on the bench at Stamford Bridge.
City's management duo are expected to received only a fine following their dismissals.
For Chelsea, many are expecting their legendary manager, Jose Mourinho, to rotate his squad slightly for Saturday's tie.
With Chelsea's Capital One Cup Semi-Final with Liverpool evenly-poised at 1-1 going into next Tuesday's second leg and a date with title rivals Manchester City awaiting the following weekend, Mourinho could look to give some of his main stars the afternoon off.
This may mean starting berths against the Bantams for the likes of Didier Drogba, Andre Schurrle, Ramires, Loic Remy and Mohamed Salah.