Currently in Chapter 13, is there a requirement that I file a loan mod ONLY with my servce lender?

Not sure exactly what you are asking. Assuming you mean to ask if you have to file through the BK court. You should consult with your attorney. All contracts (and a mortgage is a contract) fall under the purview of the court. Any changes need court approval.

Unfortunately yes. In order to do a loan modification you do have to go through your current lender for that. You may have other options though. You may qualify for a streamline or HARP refinance with your current lender. Either way, you would need to contact them.

Consult your attorney. A change in your mortgage debt, either in amount or required payment, can affect the terms of your bankruptcy plan.

If you wish to get your loan modified, you will have to contact your existing lender. This is irrespective of the fact whether or not you have filed bankruptcy. The existing lender will decide whether or not to modify your mortgage.

No but you would want to do some homework before you file with any 3rd party company. There are few segments of the industry that have been plagued by unethical and unscrupulous individuals more so than the modification segment.Get 3 references and proof that they have successfully completed modification before you pay a penny!

There are companies that will assist you in the process, but ultimately, a Loan Modifications is only available from your current lender.