Chemotherapy Administration Codes 96413, 96415 and 96417: Initial, Sequential, Concurrent and the Infusion Hierarchy

Chemotherapy administration codes are the CPT codes 96401 through 96549 for giving antineoplastic drugs and other highly complex agents, with 96413 (initial infusion, up to one hour), 96415 (each additional hour) and 96417 (each additional sequential drug) used most often in an infusion suite. They are the top tier of a three-tier hierarchy, with the therapeutic infusion codes (96365 to 96379) and the hydration codes (96360, 96361) below them.

There are many rules, but they come down to one idea: each visit has one initial service, and everything else that day is an add-on to it.

Where you see it

Place	What goes there
CMS-1500 box 24D, 837P loop 2400 SV101	The administration code, with modifier 59 only in the two cases Medicare allows a second initial code, and modifier 25 on a same-day E/M
Box 24G	Units: 1 for an initial code; the number of hours or sequential drugs for an add-on
Nursing infusion record	Start and stop times for every drug and every bag, the only evidence that supports hours and the push-versus-infusion call
Medicare Physician Fee Schedule	Add-on codes carry global indicator ZZZ: payable only with another drug administration code on the claim
NCCI edits and the MUE table	96368 limited to one unit per encounter; a second initial code fails a procedure-to-procedure edit

The three tiers and the codes in them

Tier	Initial	Add-ons
Chemotherapy and complex drugs	96413 infusion, up to 1 hour; 96409 IV push	96415 each additional hour; 96417 each additional sequential infusion of a new drug, up to 1 hour; 96411 each additional push of a new drug; 96416 initiation of a prolonged infusion over 8 hours by pump; 96401 and 96402 subcutaneous or intramuscular chemotherapy
Therapeutic, prophylactic, diagnostic	96365 infusion, up to 1 hour; 96374 IV push	96366 each additional hour; 96367 additional sequential infusion of a new drug, up to 1 hour; 96368 concurrent infusion; 96375 additional sequential push of a new drug; 96376 additional push of the same drug, facilities only; 96372 therapeutic injection, subcutaneous or intramuscular
Hydration	96360 initial, 31 minutes to 1 hour	96361 each additional hour

Medicare’s manual says chemotherapy administration codes apply to parenteral non-radionuclide antineoplastic drugs, to antineoplastic agents given for non-cancer diagnoses, and to substances such as monoclonal antibodies and other biologic response modifiers; it names infliximab, rituximab and trastuzumab among them. Anti-emetic and anti-anemia drugs given to cancer patients are not chemotherapy administration, even on a chemotherapy day. Contractors may publish their own lists of which drugs qualify, so check your MAC’s.

The rules, one at a time

• One initial service per encounter. The initial codes are 96360, 96365, 96374, 96409 and 96413. A second initial code is denied unless the patient comes back for a separately identifiable encounter the same day or protocol requires two IV sites; those cases take modifier 59. A double-lumen catheter is one site.
• Which service is initial. CPT’s facility hierarchy ranks chemotherapy over therapeutic over hydration, and infusion over push over injection. For the physician claim, Medicare says the initial code is the one that best describes the key or primary reason for the encounter, reported regardless of the order the drugs were given. On a chemotherapy day these agree: 96413 is initial even if the premedications ran first.
• Sequential and concurrent services take add-on codes. If a service is sequential or concurrent in nature it takes the add-on code even when it is the first such service that day. A push given after an hour of infusion is a subsequent push.
• Push versus infusion. A push is an injection where the clinician is continuously present, or any infusion of 15 minutes or less. Sixteen minutes or more, documented, is an infusion.
• Additional hours. 96415 and 96366 are reportable only when the infusion runs more than 30 minutes beyond the hour increment. One hour and 45 minutes is 96413 plus one 96415; one hour and 20 minutes is 96413 alone.
• Hydration thresholds. 96360 requires 31 minutes to one hour; 96361 is each additional hour beyond that by more than 30 minutes. Fluid used to carry a drug is incidental hydration and is never billed. Hydration running concurrently with any other infusion is not reportable. Hydration given as a secondary service after 96413 through the same access is 96361, not 96360.
• Concurrent. 96368 is reported once per encounter at most, however many drugs run together and however long. There is no chemotherapy concurrent code; a non-chemotherapy drug running alongside chemotherapy is 96368.
• Included in the administration. IV start, access to a port, the flush at the end, tubing and supplies, local anesthetic and preparation of the chemotherapy agent. Port flush 96523 is not reported on a day with any other infusion or visit.
• Visits. 99211 is never paid with a drug administration code. A higher-level E/M on the same day is reportable with modifier 25 when it is significant and separately identifiable; a different diagnosis is not required.
• Setting. Physicians report these codes for office services only. In a hospital outpatient department the facility reports them, following the CPT hierarchy.

Worked example: a carboplatin and paclitaxel day

An illustrative office infusion suite, one patient, one IV site, times from the nursing record.

Time	What happened	Code	Units	Why
9:00	Dexamethasone IV push	96375	1	Subsequent push of a new drug; the day’s initial service is the chemotherapy
9:05	Ondansetron IV push	96375	1	Another new drug by push
9:15 to 12:15	Paclitaxel infusion, 3 hours	96413	1	Initial chemotherapy infusion, first hour
		96415	2	Hours two and three, each more than 30 minutes past the increment
12:15 to 12:45	Carboplatin infusion, 30 minutes	96417	1	Sequential infusion of a different chemotherapy drug; more than 15 minutes, so an infusion, not a push
12:45 to 13:30	Normal saline 500 mL for nephroprotection, ordered and documented	96361	1	Hydration as a secondary service after the initial chemotherapy, 45 minutes, at least 31

Seven lines, one initial code. Two errors we see weekly: billing 96360 for the saline (a second initial code, denied) and billing 96365 for the premedication pushes (wrong technique and a second initial code). A third is missing the 96415 units when the paclitaxel stop time is not recorded; without times, only one hour can be billed.

What to do

• Capture start and stop times for every bag and every push. Hours, the push-versus-infusion call and the hydration threshold all come from the times. Without times, the add-ons cannot be billed.
• Report the chemotherapy code as the initial service and map every other same-day service to its add-on: therapeutic infusion to 96367, push to 96375, hydration to 96361, concurrent non-chemotherapy drug to 96368.
• Check the drug list. Monoclonal antibodies and biologic response modifiers may be chemotherapy administration under Medicare; anti-emetics and growth factors never are.
• Bill hydration only when it is a service in its own right, ordered for a clinical reason, documented, and at least 31 minutes, never for the fluid that carried the drug.
• Denials to recognize: CARC 97 (payment included in another service) or an NCCI edit on a second initial code or on 96360 billed with 96413 is a correction, not an appeal, unless there truly were two encounters, in which case resubmit with 59 and the times. CARC 151 on 96368 above one unit is the MUE. A 96415 line denied with the first hour paid usually means the times did not support it.
• Iridium Suite’s claim scrubber carries CCI and payer edits for the chemotherapy administration hierarchy (96413, 96415, 96417) and the hydration add-ons.

Related terms

• J-codes and NDC reporting
• JW and JZ modifiers: discarded drug billing
• ASP plus 6 percent: how Medicare pays for Part B drugs
• Medically unlikely edits (MUE)
• Incident-to billing
• Facility vs non-facility rates

Further reading: CMS Medicare Claims Processing Manual, Chapter 12, section 30.5, Payment for Codes for Chemotherapy Administration and Nonchemotherapy Injections and Infusions (PDF); CMS Medicare NCCI Policy Manual 2026, Chapter 11, sections B and N (PDF); Noridian JE Part A, Chemotherapy Administration Billing; Noridian JE Part A, Hydration; First Coast, Part A outpatient infusion and hydration services.