Top 5 Mistakes in Infusions and Hydration Coding to Avoid

Alexis Wilkinson CPC
Feb 13
2 min read

Updated: Mar 28

1. Not Knowing When to Use CPT Codes 96360 vs 96361

A common mistake in IV hydration coding is misunderstanding when to use CPT codes 96360 and 96361.

96360 is used for the initial 31–60 minutes of hydration
96361 is an add-on code for each additional hour

However, hydration coding depends on what other services are performed during the encounter.

If a therapeutic infusion (96365) or an IV push (96374) is administered, these services take priority. In these cases, IV hydration (96360) is not reported as the initial service.

Instead, you would skip 96360 and report 96361 for any hydration time that meets the required criteria.

Failing to follow this hierarchy can lead to incorrect billing and potential claim denials.

2. Billing Without a Documented Stop Time

In IV hydration coding, documentation is everything and stop time is mandatory.

It does not matter if the service meets all other criteria. If there is no documented stop time, there is no billable code.

Without both a start and stop time, the total duration cannot be verified, which means the service does not meet billing requirements.

To ensure compliance, always document:

Start time
Stop time
Total infusion time

3. Billing Hydration When It Is Given Concurrently with a Therapeutic Infusion

Hydration is not separately billable when it is administered concurrently with a therapeutic infusion. This is one of the most common mistakes in IV hydration coding and often leads to overbilling.

It does not matter if hydration is running and fully documented. If it is given at the same time as a therapeutic infusion, it is not separately reportable under CPT guidelines.

Therapeutic infusions take priority over hydration services. Because of this hierarchy, hydration is considered incidental when performed at the same time.

Billing hydration in this situation is incorrect and can result in claim denials, audits, and potential recoupment of payments.

Failure to include a stop time will result in lost charges and potential claim denials.

4. Billing for KVO (Keep Vein Open) Hydration

Not all fluids qualify as billable hydration, and KVO (keep vein open) fluids are a key example of this.

Fluids administered at a minimal rate to maintain vein access are considered incidental to the primary service. They are not being given for hydration therapy and therefore do not meet the criteria for billing IV hydration.

It does not matter if fluids are running for an extended period of time. If the purpose is simply to keep the vein open, there is no billable hydration service.

Incorrectly billing KVO fluids as hydration can lead to compliance issues and inaccurate coding.

5. Not Meeting the 31-Minute Rule

Time requirements must be met in order to bill IV hydration services correctly.

To report CPT code 96360, hydration must run for at least 31 minutes. This is the minimum threshold required for the service to be considered billable.

If the infusion does not meet the 31-minute requirement, it is not billable, regardless of documentation or intent. Even if hydration was medically necessary, failing to meet the time threshold means the code cannot be reported.

This rule is often overlooked, but it is essential for accurate and compliant billing.