Question:

Jim, do know of any doctors in South Carolina that write nexus letters?

Jim's Reply:

You don't want or need a doctor nearby, you need and want an expert in disability medicine who knows what VA needs to approve your claim. You'll never meet the doctor face to face, all that's involved is a review of your medical records so the doctor can form an opinion and write an Independent Medical Opinion (IMO) to support your claim or appeal.
 

I've referred to a small handful of trusted physicians and psychologists for many years and I know they do a good job. If you have a well grounded claim or appeal, talk to any or all of the doctors you'll meet here https://www.vawatchdog.org/imo-ime-medical-opinions-exams.html 
 

Good luck.