May 2025

What Is Denial Code 164? Denial Code 164 indicates that the claim attachment was either not received or was submitted after the payer’s deadline. This seemingly minor issue can result in frustrating delays and lost revenue. Understanding the why behind this denial is key to stopping it from recurring. Why Timely Attachments Get Missed: The

One of the most common and frustrating obstacles in healthcare billing is dealing with denied claims—especially those tagged with Reason Code M86 denials. This denial states: “Service denied because payment already made for same/similar procedure within set time frame.” For healthcare providers, understanding why this happens and how to prevent it is crucial to maintaining