MRR Hospital, Worli - Designed by PG Patki architects (http://pgpatkiarchitects.com/), it should be around 150 meters. It looks similar to Mukesh's Antilia tower.

Renders:

http://img31.imageshack.us/img31/2364/45509148.png

http://img710.imageshack.us/img710/3958/74337241.png

http://img593.imageshack.us/img593/6355/91028215.png

Location (view on google maps (http://maps.google.com/maps?ll=19.009059,72.820258&spn=0.002784,0.005493&sll=19.017615,72.856164&sspn=0.337738,0.512238&gl=us&vpsrc=6&t=h&z=18)): On Dr. Annie Besant Road

http://img713.imageshack.us/img713/2637/rap1.jpg

http://img101.imageshack.us/img101/8692/rap2z.jpg



Updates:
August 3 2010 -Copyright ab_aditya
http://img808.imageshack.us/img808/7424/raptakosbrettplot.jpg


December 2010 - Copyright India101
http://img15.imageshack.us/img15/4403/14bufdl.jpg

This is well off ground now. So i hope we get regular updates as this one starts growing taller. Can somebody find out the exact height, floor count?

Taken today, 25th September 2011.
Copyright@Savz
http://img713.imageshack.us/img713/9083/img0678w.jpg

This tower is actually a hospital called MRR Hospital with 35 floors:

MRR Hospital - 3 basement with ground + 35 floors
http://img718.imageshack.us/img718/9892/mrrhospital.jpg
-Source (http://www.bebanco.com/ongoing-projects-utility.html#MRR-Hospital)


Title changed from 33 to 35fl as well.

Nifty looking hospital.

Is this the world's tallest hospital?

^^ It depends. Tecnically, the Bellaire in NYC is much taller (50 floors), but it is also an apartment.
If you count by floors, then yes it should the tallest hospital in the world.
Height may be an issue, as theres a hospital in houston which is quite tall (145m) but only 30 floors.

With the sheer number of people in Mumbai, they really need a hospital of this size. I'm looking forward to seeing the finished product.

Larger render - Click on it to view super large

The caption suggests that it'll house the luxury Baglioni hotel (http://www.baglionihotels.com/en) as well. PGP's website says it'll have 100 rooms.

http://img20.imageshack.us/img20/5941/97627278.jpg (http://img809.imageshack.us/img809/2003/12575069.jpg)
-from a presentation on PG Patki (http://www.slideshare.net/nakulborkar/p-g-patki-architects-profile)


LPA Architects are working on the interior design:

http://www.lparchitecture.it/eng/projects/hotel_resort/hb_mumbai

I had read a report that a Trust Controlled by A R Antulay is building a large hospital in Worli, i guess this is it.

^^This one is being built by Raptakos and Brett Company.They earlier used to have their office building their which they demolished to make way for this hospital but they are in financial trouble nw so work is halted.

Thanks for the update CG.
If AR Antulay is not in some way related to this project, it means there re 2 proposed multi-speciality hospitals coming up in Worli. Interesting.

Older render from Enerach (http://www.enerarch.com/raptokas/) -

http://img259.imageshack.us/img259/1007/rapta.png