Health insurance denial & claim adjustment codes

What health insurance denial code 1 means on your EOB

The portion applied to your deductible. Legitimate, but worth checking against how much deductible you have actually met this year.

What usually causes it

• You have not yet met your annual deductible.
• Prior claims may not have been applied correctly.
• Family versus individual deductible may be applied wrongly.

The documents that decide it

• Your EOB.
• Your year-to-date deductible accumulation from the plan.
• Your plan's deductible amount and structure.

What to do next

Pull your accumulator total from the plan and check it against the claims you know were processed. Misapplied deductibles are common and quiet.

This page explains what a code means. It is information, not advice — it does not tell you whether your specific claim should have been paid, and it is not legal, medical, or insurance advice. Your plan documents and your denial notice govern your situation.