No. J7674 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 J7674?

$1.766 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 J7674?

One unit of J7674 is 1 mg, as stated in the code's descriptor. Units to report = dose given ÷ 1 mg.

J7674 HCPCS Code — Methacholine chloride, neb

In short

J7674 is the HCPCS Level II code for methacholine chloride administered as inhalation solution through a nebulizer, per 1 mg. CMS assigns NDCs for Provocholine and Provocholine Inhalation Solution to it. One billing unit is 1 mg. The Medicare Part B payment limit is $1.766 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ7674

Billing unit1 mg

Descriptor: Methacholine chloride administered as inhalation solution through a nebulizer, per 1 mg
Short descriptor: Methacholine chloride, neb
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2005

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$1.766

Per1 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

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.

NDCs billed under J7674

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 2 NDCs to J7674 for Provocholine and Provocholine Inhalation Solution. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J7674 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Provocholine	64281-0100-06	Methapharm Inc.	6 × 1	600
Provocholine Inhalation Solution	64281-0110-06	Methapharm Inc.	6 × 15	384

J7674: common questions

Is J7674 a CPT code?: No. J7674 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 J7674?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 2 NDCs under J7674, for Provocholine and Provocholine Inhalation Solution. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J7674?: $1.766 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 J7674?: One unit of J7674 is 1 mg, as stated in the code's descriptor. Units to report = dose given ÷ 1 mg. J-code billing units.

J7674 — Methacholine chloride administered as inhalation solution through a nebulizer, per 1 mg