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AI Summary: This document is a policy document. Here is a summary: This regulation concerns the Drug Enforcement Administration's (DEA) revocation of medical practitioner Chantal F. Nouvellon's controlled substances registration in Massachusetts and New Hampshire. The DEA is revoking her registration because her medical licenses in both states have been suspended, which means she is no longer authorized to handle controlled substances in those jurisdictions. Under the Controlled Substances Act, practitioners must maintain a valid state medical license to be eligible to dispense controlled substances. Since Dr. Nouvellon did not request a hearing after receiving an Order to Show Cause, she was deemed to be in default, which constitutes an admission of the factual allegations. As a result, the DEA is revoking her two existing DEA registrations (BN5595775 and FN5439016) and denying any pending applications for renewal or modification. The order becomes effective on November 19, 2025.