(1) “Dependent child” means an insured’s child by blood or by law who:
(A) Is under 26 years of age;
(B) Has no dependent of his own;
(C) Is enrolled as a full-time student at an accredited public or private institution of higher education; and
(D) Is not provided coverage, or eligible to receive coverage, as a named subscriber, insured, enrollee, or covered person under any other group health plan or individual health plan, or entitled to benefits under Title XVIII of the Social Security Act, approved July 30, 1965 (Pub. L. No. 89-871; 42 U.S.C. § 1395 et seq.), at the time dependent coverage pursuant to this chapter begins.
(2) “Group health plan” means an employee welfare plan (as defined in section 3 (1) of the Employee Retirement Income Security Act of 1974, approved September 2, 1974 (88 Stat. 829; 29 U.S.C. § 1002(1)), to the extent that the plan provides medical care and includes items and services paid for as medical care to employees or their dependents (as defined under the terms of the plan) directly or through insurance, reimbursement, or otherwise.
(3) “Health insurance coverage” means benefits consisting of medical care (provided directly, through insurance or reimbursement, or otherwise and includes items and services paid for as medical care) under any hospital or medical service policy or certificate, hospital or medical service plan contract, or health maintenance organization contract offered by a health insurer.
(4) “Health insurer” means any person that provides one or more health benefit plans or insurance in the District, including an insurer, a hospital and medical services corporation, a fraternal benefit society, a health maintenance organization, a multiple employer welfare arrangement, or any other person providing a plan of health insurance subject to the authority of the Commissioner.