Okla. Stat. tit. 56, § 56-1010.13

A Medicaid beneficiary, including, but not limited to, a

beneficiary currently enrolled in a fully or partially capitated

managed care delivery model pursuant to the provisions of the

Oklahoma Medicaid Healthcare Options System, who is not medically or

legally competent may have another person act on the beneficiary’s

behalf for purposes of enrollment or reenrollment into any of the

managed care delivery models. A person so authorized shall be a

member of one of the following classes of persons:

1. An authorized representative pursuant to the provisions of

20 U.S. Code of Federal Regulations, Section 404.2021;

2. The beneficiary’s spouse;

3. The guardian of the person appointed pursuant to the

Oklahoma Guardianship and Conservatorship Act;

4. The attorney-in-fact for health care decisions acting

pursuant to the provisions of the Uniform Durable Power of Attorney

Act or the health care proxy acting pursuant to the provisions of

the Oklahoma Rights of the Terminally Ill or Persistently

Unconscious Act;

5. A child of the beneficiary who is at least eighteen (18)

years of age;

6. A parent of the beneficiary; or

Oklahoma Statutes - Title 56. Poor Persons Page 226

7. A brother or sister of the beneficiary who is at least

eighteen (18) years of age.