No. J2788 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 NDCs are billed under J2788?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 1 NDC under J2788, for HyperRho S/D. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J2788?

$27.653 per 50 mcg (250 iu), 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 J2788?

One unit of J2788 is 50 micrograms (250 i.u.), as stated in the code's descriptor. Units to report = dose given ÷ 50 micrograms (250 i.u.).

J2788 J-Code: HyperRho S/D (rho d immune globulin)

In short

J2788 is the HCPCS Level II code for injection, rho d immune globulin, human, minidose, 50 micrograms (250 i.u.). CMS assigns NDCs for HyperRho S/D to it. One billing unit is 50 micrograms (250 i.u.). The Medicare Part B payment limit is $27.653 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ2788

Billing unit50 micrograms (250 i.u.)

Descriptor: Injection, rho d immune globulin, human, minidose, 50 micrograms (250 i.u.)
Short descriptor: Rho d immune globulin 50 mcg
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2014

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$27.653

Per50 mcg (250 iu)

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

Units and claim line

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

HCPCS units

Modifier

NDC (11-digit)

NDC unit qualifier

NDC quantity

Enter the units to build the claim line.

NDCs billed under J2788

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 1 NDC to J2788 for HyperRho S/D. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J2788 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
HyperRho S/D	13533-0661-06	Grifols USA, LLC	10 × 1	10

J2788: common questions

Is J2788 a CPT code?: No. J2788 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 NDCs are billed under J2788?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 1 NDC under J2788, for HyperRho S/D. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J2788?: $27.653 per 50 mcg (250 iu), 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 J2788?: One unit of J2788 is 50 micrograms (250 i.u.), as stated in the code's descriptor. Units to report = dose given ÷ 50 micrograms (250 i.u.). J-code billing units.

J2788 — Injection, rho d immune globulin, human, minidose, 50 micrograms (250 i.u.)