No. J7340 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 J7340?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 1 NDC under J7340, for Duopa. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J7340?

$243.108 per 100 ml, 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 J7340?

One unit of J7340 is 100 ml, as stated in the code's descriptor. Units to report = dose given ÷ 100 ml.

J7340 J-Code: Duopa

In short

J7340 is the HCPCS Level II code for carbidopa 5 mg/levodopa 20 mg enteral suspension, 100 ml. CMS assigns NDCs for Duopa to it. One billing unit is 100 ml. The Medicare Part B payment limit is $243.108 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ7340

Billing unit100 ml

Descriptor: Carbidopa 5 mg/levodopa 20 mg enteral suspension, 100 ml
Short descriptor: Carbidopa levodopa ent 100ml
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2020

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$243.108

Per100 ml

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 J7340

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 1 NDC to J7340 for Duopa. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J7340 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Duopa	00074-3012-07	AbbVie Inc.	7 × 100	7

J7340: common questions

Is J7340 a CPT code?: No. J7340 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 J7340?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 1 NDC under J7340, for Duopa. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J7340?: $243.108 per 100 ml, 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 J7340?: One unit of J7340 is 100 ml, as stated in the code's descriptor. Units to report = dose given ÷ 100 ml. J-code billing units.

J7340 — Carbidopa 5 mg/levodopa 20 mg enteral suspension, 100 ml