N.H. Rev. Stat. Ann. § 126-A:12-a

The department shall pay health care providers, including dental providers, within 45 days of receipt of a clean claim for services rendered to medicaid recipients. For the purposes of this section "clean claim" means a claim for payment of covered health care expenses that is submitted to the department on the department's standard claim form using the most current published procedural codes, with all the required fields completed with correct and complete information in accordance with the department's published filing requirements.