H1B Change of Employer and extension approved - Do I need visa?

[MuruganH1B]

Hai Murthy Forum,

Came to US to work for company A on H1B with visa & I-94 valid till sep 2012. later started working for company B on receipt notice. It is almost 3 months I have been working on Company B on receipt notice and the decision is still pending.

Note: entered USA and never worked for Company A.

Last week I had company C initiate a H1B transfer cum extension in premium processing using the Company A approval. I get the Company C approval without the I-94.

My question is since my Company A visa is valid till Sep 2012, can I just go out of the country and re-enter with the same visa using the Company C approved petition? or do I need to attend the consulate for the visa?

Please advice. Thank you.