How does my client's insurance company know to attribute what the client has paid me towards their deductible?

It can feel a bit like "magic" how the insurance company knows what happened in your office, but it follows a standardized data exchange:

Step 1: You collect the payment from the client based on their benefit verification.
Step 2: CCS submits a professional claim (CMS-1500) to the payer.
Step 3: The insurance company processes the claim and generates an Explanation of Benefits (EOB).
Step 4: This EOB officially attributes the amount to the client’s deductible, updating their remaining balance in the insurance system.