HCPCS Code Q0138 — What It Means on Your Medical Bill

HCPCS code · Medication · Typically billed in: Hospital or clinic

What HCPCS code Q0138 means: An injectable dose of iron (ferumoxytol).

Seeing HCPCS code Q0138 on your medical bill?
This code is only one part of the picture — your bill, EOB, insurance adjustments, units, and other charges may affect what you actually owe. MD Bill Check reads the codes on your document, checks the bill in context, and flags items that may be worth reviewing.

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How many units of HCPCS code Q0138 should appear on one day

Units normally expected per day: Medicare normally expects at most 510 units of HCPCS code Q0138 per patient per day. More than 510 units a day is clinically unlikely rather than impossible, so a higher count is usually reviewed by hand rather than denied outright.

If your bill shows more units of HCPCS code Q0138 for a single date of service than that, it is worth asking the billing office to explain the count — duplicate lines and unit-entry mistakes are among the most common medical-billing errors.

Related codes

HCPCS J1885An injectable dose of ketorolac (Toradol), a strong anti-inflammatory pain medicine. HCPCS J1100An injectable dose of dexamethasone, a steroid. HCPCS J3420An injection of vitamin B-12. HCPCS J2550An injectable dose of promethazine (Phenergan), for nausea.

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Frequently asked questions about HCPCS code Q0138

What does HCPCS code Q0138 mean on a medical bill?

An injectable dose of iron (ferumoxytol). Bills group it under "Medication", and it is typically provided in this setting: Hospital or clinic.

How many units of HCPCS code Q0138 can be billed per day?

Medicare's Medically Unlikely Edits normally expect at most 510 units of HCPCS code Q0138 per patient per day. More than 510 units a day is clinically unlikely rather than impossible, so a higher count is usually reviewed by hand rather than denied outright.

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Last reviewed 2026-08-09 · MDBillCheck Editorial Team. Plain-English explanations are original wording, not official code descriptors. Medicare amounts are public national averages for reference only — your own bill depends on your insurer, provider, and location.