Blue Cross NC Is Adding a New Diagnosis Code Edit: What Behavioral Health Providers Need to Know

3 hours ago

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Blue Cross and Blue Shield of North Carolina recently announced a billing change that may affect behavioral health claims beginning November 1, 2026.

The change involves something called an ICD-10-CM Excludes1 edit.

If coding terminology isn't your thing, don't worry. The basic concept is pretty simple.

Blue Cross NC will begin checking claims for certain diagnosis codes that generally should not be reported together for the same patient during the same encounter. If conflicting diagnosis codes are submitted, the claim may not be reimbursed.

The notice applies to Blue Cross NC, Healthy Blue, and Healthy Blue Care Together.

What Is an Excludes 1 Edit?

An Excludes1 note is part of the ICD-10-CM coding system.

In simple terms, it tells us that certain diagnosis codes generally should not be reported together.

That doesn't mean a patient can't have more than one behavioral health diagnosis. Many patients do.

The issue is whether the specific combination of diagnosis codes submitted on the claim conflicts with ICD-10-CM coding guidance.

This becomes especially important when a patient has multiple diagnoses listed in their chart and more than one diagnosis is being submitted on the claim.

Why Does This Matter for Behavioral Health Providers?

Behavioral health providers routinely work with patients who have multiple diagnoses.

A patient receiving therapy, psychiatric services, psychological testing, ABA services, or other behavioral health treatment may have a primary diagnosis along with additional conditions.

Having multiple diagnoses isn't automatically a problem.

The concern is whether any of those diagnoses are considered conflicting under the Excludes1 coding rules.

Blue Cross NC states that when an Excludes1 conflict is identified, the claim will not be eligible for reimbursement.

That could mean a claim that otherwise appears correct is delayed or unpaid because of the diagnosis combination reported.

What Should Providers Do?

You do not need to become an ICD-10 coding expert.

However, your practice should make sure the diagnoses entered into the EHR accurately reflect the patient's documented conditions.

There should be a process for reviewing diagnosis combinations before claims are submitted.

If a potential coding conflict is discovered, they should go back to the treating provider for clarification, rather than simply removing or changing a diagnosis to get the claim paid.

Blue Cross NC specifically recommends reviewing diagnosis coding before submitting claims and checking whether an Excludes1 note applies to an entire category of codes or to a specific diagnosis.

Does This Change the Patient's Coverage?

No.

Blue Cross NC specifically states that this is a billing requirement and does not change member care or covered services.

This is about making sure the diagnosis codes submitted on the claim follow ICD-10-CM coding guidelines.

The Bottom Line

This isn't something providers need to panic about, but it is something behavioral health practices should be aware of.

Accurate diagnosis coding matters, especially when multiple diagnoses are being submitted on the same claim.

Your billing team should be reviewing claims for coding conflicts before submission whenever possible. Catching an issue before the claim goes out is much easier than trying to resolve it after payment has been delayed.