One missing line on a Good Faith Estimate can hand a patient a $400 dispute against you. Under the No Surprises Act's patient-provider dispute resolution rule, the patient is structured to win. This Deep Dive unpacks how the GFE rule actually applies to PMHNP cash-pay and out-of-network practices in 2026: what counts as the convening provider, when the three-day clock starts, which CPT codes have to appear, and the exact $400-over-the-estimate threshold that triggers binding arbitration. You will come away with: - The line items HHS-OIG looks for on a compliant GFE - The "good-faith" boundary new PMHNPs keep tripping over - A pre-visit workflow that closes the $400 dispute door before it opens Full post with the templates and citations: https://psychnpfellowship.com/good-faith-estimate-pmhnp-private-practice-2026/