Okla. Stat. tit. 36, § 4528
A. Nothing in this act shall be construed as preventing one or more Health Insurance Purchasing Groups (HIPG) from serving different areas, whether or not contiguous, by providing for some or all of the following through a single administrative organization or otherwise:
2. Providing for crediting of deductibles and other cost-sharing for individuals who are provided a health benefits plan through the HIPG or affiliated HIPG after: