Wyoming External Review Process for Insurance Denials

Wyoming has a state-regulated external review process that is generally (though not exclusively) applicable to denials based on medical necessity. The fact that it is state regulated means that, regardless of the insurance plan that you are on, you will follow a process laid out by the Wyoming Department of Insurance.

All commercial plans are eligible for this external review process, excluding plans that provide coverage for long-term care and federally provided plans such as Medicare, Medicaid, the Federal Employees Health Benefits Program or supplement, supplemental liability insurance, and Wyoming Workers' Compensation or automobile medical-payment insurance (as described in Wyoming Insurance Department Regulations, Chapter 63).

Generally, external reviews are available for denials for claims on services, procedures, or supplies that are 'not medically necessary' (link).

Before you are eligible for an external review of your claim denial, you must exhaust your internal appeals options first. You have 120 days from the date of issuance of your carrier's final denial.

A national report in 2026 indicates that almost half of external appeals are overturned (link).

This guide explains how Wyoming's external review process works, who qualifies, how to file correctly, and how to avoid mistakes that cause unnecessary delays.

Use this timeline to track the key Wyoming deadlines from denial through independent review.

An external review is an independent review of your insurance denial by a certified reviewer (IRO) who has no connection to your insurer.

Unlike an internal appeal, where the insurance company reviews its own denial, external review moves the case outside the insurer. The reviewer looks at:

The reviewer does not work for your insurance company, and this can make a meaningful difference because the IRO does not have a bias toward denying the claim in the insurer's favor.

IMPORTANT: According to Chapter 63 (Medical Necessity Review Rights), a request for internal review must be submitted within 30 days of receipt of an adverse benefit determination.

Some claims are denied due to simple administrative errors. Make sure all of the information on your EOB is correct. If you see obvious errors, these denials can often be fixed with a quick phone call.

Your insurance policy should indicate how to appeal a denial. There are typically two levels of appeals: an internal (first-level) appeal and an external (second-level) appeal.

Be sure to document everything: who you speak with, when, and what was communicated. Keep all necessary documents in hand, including your policy, Summary of Benefits, and denial letter.

We can help you write a properly structured appeal letter for free at GuideMyClaim. Reach out today at support@guidemyclaim.com.

Be persistent and follow up. If you feel your insurer is not cooperating or not following the appeals process, contact the Wyoming Department of Insurance at link.

If you receive a final adverse benefit determination that you still disagree with, it is time to escalate the case through the external appeals process.

In Wyoming, appeals must be submitted directly to the insurer within 120 days of the final internal adverse benefit determination, or after 45 days have passed and a final determination has not been received.

Typically, you will complete and mail an external appeal document. Forms vary by carrier, but a representative form can be found here: link.

To be considered for review, you must mail the external appeal document and duplicate, a healthcare professional certification of medical necessity, and a $15 fee. Submission of the document does not ensure acceptance. If accepted, your case will be assigned to an independent review organization (IRO) licensed by the state.

To submit an expedited review, use the same External Review Request Form and include a certification from your treating physician explaining why expedited review is necessary.

Expedited appeals must explain in detail why one of the following applies:

Make sure your healthcare provider includes one of these reasons with clear medical details and supporting records.

Additional filing fee details:

Receiving insurance denials can seem final. Receiving a second denial can make reimbursement feel impossible, and the process can be frustrating and time-consuming at a time when your focus should be on your health and wellbeing.

Reach out to a patient advocate at GuideMyClaim to get free advice and assistance with your case. We'll work with you on a plan that lets you focus on what matters most: getting better.