02/16/2026
Billing Topic of the Day: Out-of-Network Denials Why do claims get denied as out-of-network — even when you’re in-network?
Here are the top causes we see every week:
🔹 Modifier or taxonomy mismatch
Claims billed with incorrect modifiers (like 95 vs GT) or taxonomy codes can trigger auto-denials, even for contracted providers.
🔹 Algorithmic misclassification
Some payers use automated systems that flag claims as out-of-network based on NPI, POS, or billing structure — not actual contract status.
🔹 Authorization confusion
Even when care is medically necessary, lack of referral or prior auth can lead to denial. This is especially common with telehealth and specialty services.
🔹 Payer cost-saving tactics
Out-of-network denials are often used to reduce payout — even when no in-network alternative exists.
🔹 Billing under the wrong plan or NPI
Submitting under a secondary NPI or incorrect plan ID can cause the system to misroute the claim.