HCPCS drug code · CMS crosswalk
Zarxio HCPCS Code
In short
Zarxio is billed under HCPCS Q5101 — Injection, filgrastim-sndz, biosimilar, (zarxio), 1 microgram. One billing unit is 1 mcg. CMS's crosswalk lists 4 Zarxio NDCs under this code.
Reference
- Q5101
- Injection, filgrastim-sndz, biosimilar, (zarxio), 1 microgramBilling unit: 1 mcg
- Labelers
- Sandoz Inc.
Medicare Part B payment limit
CMS ASP fileEffective October 1, 2026 through December 31, 2026. Payment allowance limits subject to the ASP methodology are based on 2Q26 ASP data. CMS note: 8% of reference add-on applied. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files
Zarxio units and claim line
Enter the dose given to get the Q5101 units and the NDC line for the CMS-1500 and the 837P.
Enter the dose given to build the claim line.
Zarxio NDCs and billing units
From CMS’s ASP NDC–HCPCS crosswalk, effective October 1, 2026 through December 31, 2026. Billing units per package are CMS’s figures for the code’s unit.
| NDC (11-digit) | HCPCS | Labeler | Package | Billing units per package |
|---|---|---|---|---|
| 61314-0318-01 | Q5101 | Sandoz Inc. | 0.5 | 300 |
| 61314-0318-10 | Q5101 | Sandoz Inc. | 10 × 0.5 | 3000 |
| 61314-0326-01 | Q5101 | Sandoz Inc. | 0.8 | 480 |
| 61314-0326-10 | Q5101 | Sandoz Inc. | 10 × 0.8 | 4800 |
Zarxio: common questions
- What is the HCPCS code for Zarxio?
- Zarxio is billed under HCPCS Q5101 — Injection, filgrastim-sndz, biosimilar, (zarxio), 1 microgram. One billing unit is 1 mcg. CMS's crosswalk lists 4 Zarxio NDCs under this code.
- How many Q5101 billing units are in a package of Zarxio?
- CMS lists 300 to 4,800 billing units per package, depending on the NDC, where one unit is 1 mcg. Units to report are based on the dose given, not the package.
- Is Q5101 a CPT code?
- No. Q5101 is a HCPCS Level II code from CMS for the drug itself. Giving it, for example by injection or infusion, is usually reported with a separate CPT administration code.
Other codes for the same drug
- J1442Injection, filgrastim (g-csf), excludes biosimilars, 1 microgram
- Q5110Injection, filgrastim-aafi, biosimilar, (nivestym), 1 microgram
- Q5125Injection, filgrastim-ayow, biosimilar, (releuko), 1 microgram
- Q5148Injection, filgrastim-txid (nypozi), biosimilar, 1 microgram
- Q5172Injection, filgrastim-laha (filkri), biosimilar, 1 microgram