How many J0133 billing units are in a package of Acyclovir Sodium?

CMS lists 1,000 to 2,000 billing units per package, depending on the NDC, where one unit is 5 mg. Units to report are based on the dose given, not the package.

No. J0133 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.

Acyclovir Sodium J-Code J0133 — Billing Units & NDCs

In short

Acyclovir Sodium is billed under HCPCS J0133 — Injection, acyclovir, 5 mg. One billing unit is 5 mg. CMS's crosswalk lists 9 Acyclovir Sodium NDCs under this code.

J0133 code details

Reference

J0133: Injection, acyclovir, 5 mgBilling unit: 5 mg
Labelers: Eugia US LLC; FreseniUS Kabi USA, LLC; Slate Run Pharmaceuticals

Medicare Part B payment limit

CMS ASP file

Payment limit per unit$0.048

Per5 mg

Coinsurance20%

Effective October 1, 2026 through December 31, 2026. Payment allowance limits subject to the ASP methodology are based on 2Q26 ASP data. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files

Acyclovir Sodium units and claim line

Enter the dose given to get the J0133 units and the NDC line for the CMS-1500 and the 837P.

Dose given (mg)

HCPCS units (1 unit = 5 mg)

Modifier

NDC (11-digit)

NDC unit qualifier

NDC quantity

Enter the dose given to build the claim line.

Acyclovir Sodium 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.

Acyclovir Sodium NDCs in the CMS ASP crosswalk
NDC (11-digit)	HCPCS	Labeler	Package	Billing units per package
55150-0154-10	J0133	Eugia US LLC	10 × 10	1000
55150-0155-20	J0133	Eugia US LLC	10 × 20	2000
63323-0325-10	J0133	FreseniUS Kabi USA, LLC	10 × 20	1000
63323-0325-14	J0133	FreseniUS Kabi USA, LLC	10 × 10	1000
63323-0325-20	J0133	FreseniUS Kabi USA, LLC	10 × 20	2000
63323-0325-24	J0133	FreseniUS Kabi USA, LLC	10 × 20	2000
65219-0622-10	J0133	FreseniUS Kabi USA, LLC	10 × 10	1000
65219-0624-20	J0133	FreseniUS Kabi USA, LLC	10 × 20	2000
70436-0030-82	J0133	Slate Run Pharmaceuticals	10 × 10	1000

Acyclovir Sodium: common questions

What is the J-code for Acyclovir Sodium?: Acyclovir Sodium is billed under HCPCS J0133 — Injection, acyclovir, 5 mg. One billing unit is 5 mg. CMS's crosswalk lists 9 Acyclovir Sodium NDCs under this code.
How many J0133 billing units are in a package of Acyclovir Sodium?: CMS lists 1,000 to 2,000 billing units per package, depending on the NDC, where one unit is 5 mg. Units to report are based on the dose given, not the package.
Is J0133 a CPT code?: No. J0133 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.

Acyclovir Sodium J-Code / HCPCS Code