HCPCS Level II drug code
J1163 — Injection, diltiazem hydrochloride, 0.5 mg
In short
J1163 is the HCPCS Level II code for injection, diltiazem hydrochloride, 0.5 mg. CMS assigns NDCs for Diltiazem HCl, Diltiazem in Dextrose and Diltiazem in NaCl to it. One billing unit is 0.5 mg. The Medicare Part B payment limit is $0.027 per unit (October 1, 2026 through December 31, 2026).
Code
CMS HCPCS file- Descriptor
- Injection, diltiazem hydrochloride, 0.5 mg
- Short descriptor
- Inj, diltiazem hcl, 0.5 mg
- Code set
- HCPCS Level II, maintained by CMS
- Effective
- Jul 1, 2025
The billing unit is read from the descriptor. Confirm it against the CMS file before billing.
Medicare Part B payment limit
CMS ASP fileEffective 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 ÷ 0.5 mg. For example, 50 mg is 100 units. Enter the dose to get the units and the NDC line for the CMS-1500 and the 837P.
Enter the dose given to build the claim line.
NDCs billed under J1163
CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 20 NDCs to J1163 for Diltiazem HCl, Diltiazem in Dextrose and Diltiazem in NaCl. Billing units per package are CMS’s figures for this code’s unit.
| Drug | NDC (11-digit) | Labeler | Package | Billing units per package |
|---|---|---|---|---|
| Diltiazem HCl | 00409-4350-03 | Pfizer Inc | 10 × 1 | 2,000 |
| Diltiazem HCl | 00641-6013-10 | Hikma Pharmaceuticals USA Inc. | 10 × 5 | 500 |
| Diltiazem HCl | 00641-6014-10 | Hikma Pharmaceuticals USA Inc. | 10 × 10 | 1,000 |
| Diltiazem HCl | 00641-6015-10 | Hikma Pharmaceuticals USA Inc. | 10 × 25 | 2,500 |
| Diltiazem HCl | 00641-9217-10 | Hikma Pharmaceuticals USA Inc. | 10 × 5 | 500 |
| Diltiazem HCl | 00641-9218-10 | Hikma Pharmaceuticals USA Inc. | 10 × 10 | 1,000 |
| Diltiazem HCl | 00641-9219-10 | Hikma Pharmaceuticals USA Inc. | 10 × 25 | 2,500 |
| Diltiazem HCl | 25021-0319-05 | Sagent Pharmaceuticals | 10 × 5 | 500 |
| Diltiazem HCl | 25021-0319-10 | Sagent Pharmaceuticals | 10 × 10 | 1,000 |
| Diltiazem HCl | 25021-0319-25 | Sagent Pharmaceuticals | 10 × 25 | 2,500 |
| Diltiazem HCl | 51662-1335-01 | HF Acquisition Co. LLC, DBA HealthFirst | 5 | 50 |
| Diltiazem HCl | 51662-1335-02 | HF Acquisition Co. LLC, DBA HealthFirst | 5 | 50 |
| Diltiazem HCl | 51662-1457-01 | HF Acquisition Co. LLC, DBA HealthFirst | 1 | 200 |
| Diltiazem HCl | 51662-1457-03 | HF Acquisition Co. LLC, DBA HealthFirst | 10 × 1 | 2,000 |
| Diltiazem HCl | 55150-0425-10 | Eugia US LLC | 10 × 5 | 500 |
| Diltiazem HCl | 55150-0426-10 | Eugia US LLC | 10 × 10 | 1,000 |
| Diltiazem HCl | 55150-0427-10 | Eugia US LLC | 10 × 25 | 2,500 |
| Diltiazem HCl | 70860-0301-05 | Athenex Pharmaceutical Division, LLC | 10 × 5 | 500 |
| Diltiazem in Dextrose | 63037-0119-05 | Hikma Injectables USA Inc. | 5 × 125 | 1,250 |
| Diltiazem in NaCl | 63037-0117-05 | Hikma Injectables USA Inc. | 5 × 125 | 1,250 |
J1163: common questions
- Is J1163 a CPT code?
- No. J1163 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 J1163?
- CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 20 NDCs under J1163, for Diltiazem HCl, Diltiazem in Dextrose and Diltiazem in NaCl. The table on this page shows each one with its billing units per package.
- What is the Medicare payment limit for J1163?
- $0.027 per 0.5 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 J1163?
- One unit of J1163 is 0.5 mg, as stated in the code's descriptor. Units to report = dose given ÷ 0.5 mg. J-code billing units.