Correction, September 17, 2026: an earlier version of this article said hard denials began January 1, 2026, described denial code patterns and a denial-rate range, and listed the wrong taxonomy code for BCaBAs. Optum's own notice gives no January 1 date, and we could not source the other figures, so they have been removed. The taxonomy codes below are corrected against the NUCC code set.
What Optum actually announced
The notice, published in the September 2025 issue of Optum's Top of Mind provider newsletter, says four things:
The requirement. All behavioral health claims for members in a commercial (employer-sponsored) plan must include the NPI and taxonomy code for both the billing provider and the rendering provider. Claims missing this information will be rejected or denied once the requirement takes effect.
Validation. The NPI and taxonomy will be checked against NPPES, so what you put on the claim has to match what the provider's NPPES record says.
Timing. The effective date was to be announced in Q1 2026 with an advance notification period. We check Provider Express each month; as of September 17, 2026 no effective date has been posted.
Informational edits. From October 2025, claims without rendering NPI and taxonomy, or with them in the wrong place, get an informational edit. Optum stated these edits are for awareness only and that 2025 claims stay payable.
Where the data goes on the claim
Optum's notice says rendering provider information is required when the rendering provider differs from the billing provider, which is the normal case for ABA groups billing BCBA and RBT services under a group NPI.
Electronic claims: NPI and taxonomy go in loops 2310 and 2420 of the 837P or 837I. Optum BH payer ID 87726.
Paper claims: boxes 24I and 24J on the professional form; boxes 76 and 81 on the institutional form.
Getting ABA taxonomy right
Because Optum validates against NPPES, the taxonomy on the claim must match the provider's NPPES record. The NUCC taxonomy codes for behavior analysis are:
103K00000X Behavior Analyst (BCBA, BCBA-D, state-licensed behavior analysts)
106E00000X Assistant Behavior Analyst (BCaBA)
106S00000X Behavior Technician (RBT)
Confirm each code against the provider's credential and NPPES record before you rely on it; a provider with more than one taxonomy in NPPES should bill with the one that matches the service rendered.
Four things to do before the date is announced
One. Read your informational edits. Pull recent Optum BH commercial remits and look for the informational edit on missing or misplaced rendering NPI and taxonomy. Every flagged claim is a claim that would reject once enforcement starts.
Two. Audit NPPES for every rendering provider. Confirm each BCBA, BCaBA and RBT who appears as a rendering provider has an active NPI with the correct taxonomy, and that the billing NPI's taxonomy is correct too.
Three. Fix claim build. Make sure your practice management system populates loops 2310 and 2420 with the rendering NPI and taxonomy on every commercial Optum BH claim, not only on claims where you think it matters.
Four. Watch for the notice. Optum said it will give advance notice. Check the Top of Mind newsletter on Provider Express monthly so the enforcement date does not arrive as a surprise.
What this means for your practice
Nothing is being denied for this reason today, but Optum has said clearly that it will be. The work is data hygiene you can finish now: correct NPPES taxonomy for every rendering provider and a claim build that always sends rendering NPI and taxonomy. When the date is announced, a practice that already did this has nothing to change.
✓ This month
Filter your last 90 days of Optum BH commercial remits for the informational NPI and taxonomy edit. Use the count of flagged claims and rendering providers to size the NPPES cleanup.
ASP-RCM does this
Credential OS audits NPPES and Optum BH enrollment in one dashboard.
Single view per rendering provider showing NPPES status, BACB credential alignment, taxonomy code on file, and Optum BH enrollment status by line of business. Daily NPPES delta alerts. Pre-bill scrubbing that checks rendering NPI and taxonomy on every claim before submission. If we run your credentialing, the cleanup sprint is embedded in our standard onboarding rhythm.
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