N.M. Stat. § 59A-22-34.1
Coverage for adopted children.
A. No individual or group health insurance policy or contract or health care plan
shall be offered, issued or renewed in New Mexico on or after July 1, 1988, unless the
policy, plan or contract covers adopted children of the insured, subscriber or enrollee on
the same basis as other dependents.
B. The coverage required by this section is effective from the date of placement for
the purpose of adoption and continues unless the placement is disrupted prior to legal
adoption and the child is removed from placement. Coverage shall include the
necessary care and treatment of medical conditions existing prior to the date of
placement.
C. As used in this section, "placement" means in the physical custody of the
adoptive parent.