Billing code 96366: IV infusion add-on hourMedicare rate & RVUs in Alaska
Report each qualifying additional hour of a therapeutic, prophylactic, or diagnostic IV drug infusion after an initial or sequential infusion's first hour.
Medicare pays $25.21 for 96366 in the office in Alaska (Alaska*). Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 9 sections
What 96366 covers
This code captures continued IV administration of a therapeutic, prophylactic, or diagnostic drug after the infusion's first hour. Examples include standard infusions of IV antibiotics, iron, and immune globulin. In a physician office or infusion suite, an infusion nurse or other clinical staff typically starts, monitors, and stops the infusion under physician supervision. The substance administered and the service's complexity determine whether this infusion family is appropriate.
Report 96366 with 96365 when an initial drug infusion lasts at least 91 minutes. It can also extend a qualifying sequential infusion reported with 96367 and its required primary administration code. Report one unit for each additional hour that meets the time threshold; a final increment must exceed 30 minutes. Record the start and stop times for each drug, along with its identity, dose, and route. CMS treats 96366 as an add-on paid within the primary procedure's global period, so it cannot be billed alone. As an incident-to service, it is billed only when performed under physician supervision. Report a separately billable drug supply with its appropriate HCPCS code and units.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
96366 in Alaska*
| Payment locality | Office | Facility |
|---|---|---|
| Alaska* | $25.21 | Unavailable |
How the 96366 rate is calculated
Each of 96366’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · 96366
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 0.18Practice expense 0.45Malpractice 0.01
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 96366
The CMS indicators that decide how 96366 is paid alongside other services.
CMS payment indicators · 96366
IV infusion add-on hour
| Rule | CMS value | What it means |
|---|---|---|
| Global period | ZZZ | Add-on code: falls within the primary procedure’s global period. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 5 | Incident-to service. |
96366 compared with similar codes
Compare codes
96366 vs 96365 vs 96361 vs 96415 vs 96367: national Medicare rates
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How to choose
- 96365IV drug infusion
- 96365 reports the initial therapeutic, prophylactic, or diagnostic IV infusion. For a single-drug infusion, add 96366 when administration reaches 91 minutes.
- 96361IV hydration
- 96361 reports an additional hour of IV hydration. Use 96366 for qualifying additional time administering a therapeutic, prophylactic, or diagnostic drug.
- 96415Chemo infusion add-on
- 96415 extends chemotherapy or other highly complex infusion administration. Use 96366 when the drug and administration qualify for the standard therapeutic infusion family.
- 96367Sequential IV infusion
- 96367 reports a sequential infusion of a new drug after another administration service. Add 96366 when that sequential infusion has qualifying time beyond its first hour.
96366 billing questions
How many minutes past the first hour are needed to bill this code?
The additional time must exceed 30 minutes beyond the first hour. A single-drug infusion lasting 61 to 90 minutes supports 96365 alone; at 91 minutes, it supports one unit of 96366.
Can this code be reported with a sequential infusion code?
Yes. If a sequential infusion of a different drug reported with 96367 runs long enough, 96366 captures its qualifying additional time. The encounter must also include the required primary administration code.
Should this code be used for extra hours of hydration or chemotherapy?
No. Additional hydration hours are reported with 96361. Additional hours of chemotherapy or other highly complex infusion administration are reported with 96415.
How are units counted for a long infusion?
Report one unit for each qualifying additional hour. A four-hour infusion of a drug appropriately reported under 96365 supports 96365 plus three units of 96366.
Who can perform the service and how is it billed?
Clinical staff such as an infusion nurse typically perform it. CMS identifies it as an incident-to service billed only when performed under physician supervision; documented start and stop times support the units.
Is the drug included in this code?
No. 96366 reports additional administration time; report a separately billable infused drug with its appropriate HCPCS drug code and units.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
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