Infusion Center CPT Codes and Modifiers for 2026

Infusion centers manage a wide variety of treatments, from antibiotics and hydration to chemotherapy and biologic therapies. Correct use of infusion CPT codes and modifiers for 2026 is crucial to ensure accurate billing, maximize revenue, and stay compliant with complex payer rules.

The drug administration codes themselves did not change for 2026. What has changed is how closely payers check the details: start and stop times, code hierarchy, drug wastage modifiers, and 340B reporting.

Initial Infusion Services

Only one initial service code is reported per encounter unless a separate IV site is medically necessary. In that case, the second initial code is reported with modifier -59 (or -XU or -XS for Medicare).

96401 (chemotherapy administration, subcutaneous or intramuscular) is an injection, not an infusion. It has been moved to the push and injection table below.

Choosing the Initial Code: Hierarchy Rules

The rule for choosing the initial code depends on who is billing:

• Physician offices: the initial code reflects the primary reason for the encounter, regardless of the order in which drugs were given.
• Hospital outpatient and facility claims: follow the CPT hierarchy. Chemotherapy and complex drug services come before therapeutic, prophylactic, and diagnostic services, which come before hydration. Within each level, infusions come before pushes, and pushes come before injections.

Monoclonal antibodies and other highly complex biologics are generally reported with the chemotherapy administration codes (96401 to 96549). Some payers publish their own lists, so check payer policy before billing.

Additional Hours and Concurrent Infusions

Infusion Time Rules at a Glance

IV Push and Injection Services

Pump and Port Services

Common Drug Administration Scenarios

Same-Day E/M Services

Billing an office visit on the same day as an infusion requires a significant, separately identifiable service, reported with modifier -25. Reviewing vitals, verifying medications, and getting infusion consent are part of the drug administration service and do not support a separate E/M on their own.

Drug Supply, J-Codes, and Wastage Reporting

Bill the drug itself with the correct HCPCS code (usually a J-code) and units that match the dose given and the code’s unit definition. Unit errors, especially when vial size and dose do not match, are a common cause of denials and overpayment recoupments.

For Medicare Part B, separately payable drugs from single-dose vials need modifier JW on a separate line for the amount discarded, or modifier JZ when nothing was discarded.

340B covered entities must add modifier TB to separately payable Part B drugs bought through the 340B program. The older JG modifier has not been valid since January 1, 2025.

Infusion Billing Modifiers

-91 (repeat clinical lab test) has been removed from this list because it applies to laboratory testing, not drug administration.

Common ICD-10 Codes for Infusion Centers

When the visit is only for chemotherapy or immunotherapy, list Z51.11 or Z51.12 first, followed by the cancer diagnosis. For other infusions, code the condition being treated. Hydration also needs a documented reason, such as dehydration or fluid loss.

Infusion Billing Tips for 2026

• Physician offices pick the initial code based on the main reason for the visit. Facilities follow the hierarchy: chemotherapy first, then therapeutic infusions, then hydration.
• Report a second initial code with -59 only when a separate IV site is medically necessary, not just because a different drug was given.
• Document infusion start and stop times carefully to support duration codes.
• Use -JW or -JZ on every separately payable Medicare Part B drug from a single-dose vial.
• If you are a 340B covered entity, use -TB, not -JG.
• Hydration must be medically necessary and well documented.

Frequently Asked Questions

What is the CPT code for an IV infusion?

A therapeutic, prophylactic, or diagnostic IV infusion is 96365 for the first hour, with 96366 for each additional hour. Hydration is 96360 and 96361, and chemotherapy or complex biologic infusion is 96413 and 96415.

What is the difference between a sequential and a concurrent infusion?

A sequential infusion (96367) is a new drug given after the first one, one after the other. A concurrent infusion (96368) is a second drug infused at the same time as another through the same access. 96368 is reported only once per encounter.

When does an infusion count as an IV push instead?

An infusion that lasts 15 minutes or less is reported as an IV push (96374 for the first push, 96375 for each additional new drug).

Can I bill hydration with chemotherapy?

Yes, if the hydration lasts more than 30 minutes and is medically necessary. When hydration follows a different initial service through the same access, report 96361.

What modifier replaced JG for 340B drugs?

Modifier TB. Since January 1, 2025, all 340B covered entities must report TB on separately payable Medicare Part B drugs bought through the 340B program.

Final Thoughts

Infusion billing is detailed and time-sensitive. Correct use of infusion CPT codes and modifiers for 2026 ensures you capture every minute of service, justify all billed medications, and optimize revenue while maintaining strict compliance standards.

If your team needs help with infusion denials or drug wastage reporting, Quest National Services can review your claims and show you where revenue is slipping.

CPT is a registered trademark of the American Medical Association.

For informational purposes only.