No. Q0238 is a HCPCS Level II code, maintained by CMS, that identifies the drug supplied. CPT codes are five-digit numbers from the AMA that describe services. Giving the drug, for example an injection or infusion, is usually reported with a separate CPT administration code.

What is the Medicare payment limit for Q0238?

$5.581 per 1 mg, effective October 1, 2026 through December 31, 2026, from CMS's Part B drug payment limit file. Multiply by the units billed for the allowed amount before deductible and coinsurance. It is not a coverage decision.

What is one billing unit of Q0238?

One unit of Q0238 is 1 mg, as stated in the code's descriptor. Units to report = dose given ÷ 1 mg.

Q0238 HCPCS Code: Tocilizumab-aazg — Billing Units & NDCs

In short

Q0238 is the HCPCS Level II code for injection, tocilizumab-aazg, for hospitalized adult patients with covid-19 who are receiving systemic corticosteroids and require supplemental oxygen, non-invasive or invasive mechanical ventilation, or extracorporeal membrane oxygenation (ecmo) only, 1 mg. One billing unit is 1 mg. The Medicare Part B payment limit is $5.581 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeQ0238

Billing unit1 mg

Descriptor: Injection, tocilizumab-aazg, for hospitalized adult patients with covid-19 who are receiving systemic corticosteroids and require supplemental oxygen, non-invasive or invasive mechanical ventilation, or extracorporeal membrane oxygenation (ecmo) only, 1 mg
Short descriptor: Inj, tocilizumab-aazg, hospi
Code set: HCPCS Level II, maintained by CMS
Effective: Apr 1, 2026

The billing unit is read from the descriptor. Confirm it against the CMS file before billing.

Medicare Part B payment limit

CMS ASP file

Payment limit per unit$5.581

Per1 mg

Coinsurance0%

Effective October 1, 2026 through December 31, 2026. Payment allowance limits subject to the ASP methodology are based on 2Q26 ASP data. CMS note: See COVID-19 vaccine pricing webpage for payment effective dates. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files

Units and claim line

Units = dose given ÷ 1 mg. For example, 100 mg is 100 units. Enter the dose to get the units and the NDC line for the CMS-1500 and the 837P.

Dose given (mg)

HCPCS units (1 unit = 1 mg)

Modifier

NDC (11-digit)

NDC unit qualifier

NDC quantity

Enter the dose given to build the claim line.

Find the NDC

Med-Code hasn’t mapped Q0238 to specific products yet. Search the FDA NDC Directory for the drug named in the descriptor, and check the route and strength match the code.

Search NDCs for tocilizumab-aazg

Q0238: common questions

Is Q0238 a CPT code?: No. Q0238 is a HCPCS Level II code, maintained by CMS, that identifies the drug supplied. CPT codes are five-digit numbers from the AMA that describe services. Giving the drug, for example an injection or infusion, is usually reported with a separate CPT administration code. CPT codes for drug administration.
What is the Medicare payment limit for Q0238?: $5.581 per 1 mg, effective October 1, 2026 through December 31, 2026, from CMS's Part B drug payment limit file. Multiply by the units billed for the allowed amount before deductible and coinsurance. It is not a coverage decision.
What is one billing unit of Q0238?: One unit of Q0238 is 1 mg, as stated in the code's descriptor. Units to report = dose given ÷ 1 mg. J-code billing units.

Q0238 — Injection, tocilizumab-aazg, for hospitalized adult patients with covid-19 who are receiving systemic corticosteroids and require supplemental oxygen, non-invasive or invasive mechanical ventilation, or extracorporeal membrane oxygenation (ecmo) only, 1 mg