N.H. Rev. Stat. Ann. § 420-C:4-c

In the event that a person is covered by more than one plan that requires pre-certification, the member shall obtain pre-certification from the primary plan. Although the member shall not be required to obtain pre-certification from the secondary plan, the secondary plan shall not be required to treat such services as covered services if the services do not meet its certification criteria. The secondary plan shall not refuse payment for such services solely on the basis that the services were not pre-certified by the secondary plan.