CareCost Vials
2 × 100 mg
1 billing unit = 1 mg
200 mg dose → 200 billing units
J1756 · iron sucrose
100 mg/5 mL single-dose vial · JZ when nothing is discarded
Calculate this patient's units ↓200 mg NDD-CKD · 100 mg HDD-CKD (dialysis-bundled) · 300–400 mg PDD-CKD
Your Venofer dose and 200 billing units carry straight into the estimate.
Pick the payer, enter what the patient has already met toward the deductible and the out-of-pocket maximum, and choose a program. CareCost returns the patient's share as a good faith estimate you can hand over.
Patient owes, 200 mg
Change the payer and the estimate re-prices against that payer's own published rate. The result is a good faith estimate for the patient.
J1756 bills 1 mg per unit: ordered dose ÷ 1 mg = billing units. A 100 mg dose is 100 units, a 200 mg dose is 200 units, and a 300 mg or 400 mg dose is 300 or 400 units — no rounding and no per-kilogram multiplication for any of the adult regimens.
Venofer ships as a 100 mg/5 mL single-dose vial, so the 100 mg, 200 mg and 300 mg doses each draw whole vials with nothing left over, which is why JZ is the modifier on virtually every adult claim. Only the pediatric 0.5 mg/kg dose (capped at 100 mg) can land between vial sizes and produce a JW waste line.
Medicare pays $0.227 per mg (ASP+6%), effective for claims in Q3 2026 — $45.40
for the 200-unit example above, before the $37.74 administration allowance.
| Dose | Billing units | Vials | Modifier | Separately payable? |
|---|---|---|---|---|
| 100 mg (HDD-CKD, given during hemodialysis) | 100 | 1 × 100 mg | JZ | No — bundled in ESRD PPS |
| 200 mg (NDD-CKD, standard adult dose) | 200 | 2 × 100 mg | JZ | Yes |
| 300 mg (PDD-CKD, first two doses) | 300 | 3 × 100 mg | JZ | Yes |
| 400 mg (PDD-CKD, third dose) | 400 | 4 × 100 mg | JZ | Yes |
| Pediatric HDD, 40 kg × 0.5 mg/kg = 20 mg | 20 | 1 × 100 mg | JW (80 mg discarded) | No — bundled in ESRD PPS |
| Pediatric HDD, capped at 100 mg | 100 | 1 × 100 mg | JZ | No — bundled in ESRD PPS |
JZ — no discarded drug from a single-dose container. JW — discarded drug from a single-dose container, reported on its own claim line. One of the two is required on every separately payable J1756 claim per CMS's July 1, 2023 single-dose container policy.
J1756 × 200 JZ · 96374 × 1. The same is true for the 100 mg and 300 mg
doses (1 and 3 vials, zero waste) — JZ is the norm on virtually every adult Venofer claim.
J1756 × 20 · J1756 × 80 JW. This dose is
labeled for use during hemodialysis, so in practice it is usually bundled into the ESRD PPS facility
rate along with the adult 100 mg HDD-CKD dose — the JW line applies only if the dose is ever billed
separately from that bundle.
96374 is the primary code: the labeled 100 mg and 200 mg doses are a slow IV push over 2–5 minutes. 96365 applies only when the dose is diluted in saline and infused over 15 minutes or more — the NDD-CKD infusion option and the 300 mg PDD-CKD dose — and 96366 pairs with it for the 400 mg PDD-CKD dose, which runs 2.5 hours. Full code definitions live on CPT 96374–96376 and CPT 96365–96366 rather than repeated here.
Venofer ships in one size: a 100 mg/5 mL (20 mg/mL) single-dose vial, NDC 00517-2340-01.
J1756 (“Injection, iron sucrose, 1 mg”) covers iron sucrose from any manufacturer; American
Regent's Venofer is the reference product billed under that code. Five other IV iron agents — Ferrlecit, Feraheme, INFeD, Injectafer
and Monoferric — are a different molecule each, with their own HCPCS codes and their own unit math;
none of them bills under J1756. See the
FDA Venofer label
for full dosing and administration instructions, or the
current Medicare rate for J1756 →.
200 billing units. Venofer J1756 bills 1 unit per 1 mg, so the dose in mg and the unit count are always the same number.
100 units, if the dose is ever billed separately at all. In practice the 100 mg dose given during in-center or home hemodialysis is bundled into the facility's ESRD PPS rate, so most of the time there is no separate J1756 line to build.
J1756. It covers iron sucrose from any manufacturer, and American Regent's Venofer is the reference product billed under that code.
JZ on virtually every adult claim — the 100 mg, 200 mg and 300 mg doses each draw whole 100 mg vials with nothing left over. JW only comes up with the pediatric 0.5 mg/kg dose, capped at 100 mg, which rarely fills a whole vial.
Billing 2 units for a 200 mg dose because 2 vials were used. J1756 is 1 mg per unit, not 1 vial per unit, so a 200 mg dose is 200 units — billing 2 units instead pays $0.45 rather than $45.40.
Data current: pricing Q3 2026
Sources: CMS ASP pricing files (Q3 2026); FDA-approved prescribing information (VENOFER label, American Regent); CMS single-dose container JW/JZ policy (effective July 1, 2023); CMS ESRD Prospective Payment System bundling rule (effective January 1, 2011); CPT codebook administration-code guidance.
Reviewed September 12, 2026 by Erin Rose, CareCost Estimate founder. Methodology →