Webhow to submit documents to the nvc. Immigrant visa medical exam faqs. Immigrant visa interview preparation faqs. Webemail is nvc’s most preferred method of communication regarding specific questions about a case. Follow these directions to ensure a prompt response: Write the relevant nvc. Webthe national visa center (nvc) is part of the u. s. State department and is based in portsmouth, new hampshire. Citizenship and immigration services (uscis). Webwhat is the national visa center and how does it help with immigrating to the u. s. ? What happens after uscis…