In South Dakota the insurer's clock is the tight one

Four months, filed on the state's form

The filing window is four months, counted from receipt of the notice of adverse determination or final adverse determination, and the request goes in on the Division's External Review Request Form under ARSD 20:06:53:12. The Division's own consumer material puts it plainly: the whole process can take up to two months to complete.

The five-business-day rule that can end the case

This is the provision worth knowing. Once a request is accepted and an independent review organization is assigned, the health carrier must provide the documents and materials it relied on within five business days. If it fails to, ARSD 20:06:53:17 allows the review organization to terminate the external review and make a decision to reverse the adverse determination.

Who picks the reviewer

The Division randomly assigns an independent review organization with no conflict of interest, and notifies the covered person and the carrier in writing which organization was chosen within one business day. Neither side selects the reviewer and neither side can steer the choice.

• Division forwards the request to the carrier's external review contact: 1 business day.
• Carrier's preliminary eligibility review: 5 business days.
• Carrier's notice that a request is incomplete or ineligible: 1 business day, in writing.
• Division's notice of eligibility and acceptance: 1 business day.
• Division's notice naming the assigned review organization: 1 business day.

If the carrier says you are ineligible

A preliminary rejection is not the end. Under ARSD 20:06:53:13 the carrier's written notice that a request is incomplete or ineligible must itself state that the preliminary review determination may be appealed to the Division of Insurance. The eligibility gate is reviewable by the regulator, not by the insurer alone.

The decision, and what it obliges

The independent review organization issues its decision within 45 days under ARSD 20:06:53:21, and the written notice has to carry its reasoning: the date the request was received, when the review was conducted, the date decided, the principal reasons with the evidence-based standards relied on, and the rationale. Where the organization reverses the initial adverse determination, the coverage at issue is to be immediately approved by the health carrier.

Post-payment reviews have their own clock

Not every dispute starts with a refusal up front. Where the carrier is reviewing a service already delivered, SDCL 58-17H-30 requires a retrospective review determination within a reasonable period and in no event later than 30 days after receiving the benefit request. That period may be extended once, by up to 15 days, and only where the carrier determines the extension is necessary due to matters beyond its control and notifies the covered person before the initial 30 days expire.

For South Dakota practices

Because so many of the deadlines run in business days and belong to the insurer, dates are the thing to record. Keep the date the final denial was received (it starts the four months), the date the Division accepted the request, and the date the review organization was named. Those three timestamps are what let you tell whether the carrier's five-business-day document obligation has come and gone.

What South Dakota means by clinical peer

South Dakota carries the term clinical peer through its utilization review provisions, and SDCL 58-17H-1 defines it precisely: a physician or other health care professional who holds a nonrestricted license in a state of the United States and is in the same or a similar specialty as typically manages the medical condition, procedure or treatment under review.

That definition is worth quoting in an appeal, because it settles two questions at once — the license must be unrestricted, and the specialty match is measured against who typically manages the condition rather than against whoever the plan happens to have available.