HCPCS Level II drug code
J3420 — Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg
In short
J3420 is the HCPCS Level II code for injection, vitamin b-12 cyanocobalamin, up to 1000 mcg. CMS assigns NDCs for Cyanocobalamin to it. The Medicare Part B payment limit is $0.648 per unit (October 1, 2026 through December 31, 2026).
Code
CMS HCPCS fileHCPCS codeJ3420
Billing unitSee descriptor
- Descriptor
- Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg
- Short descriptor
- Vitamin b12 injection
- Code set
- HCPCS Level II, maintained by CMS
- Effective
- Jan 1, 1997
Medicare Part B payment limit
CMS ASP filePayment limit per unit$0.648
Per1000 mcg
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.
Enter the units to build the claim line.
NDCs billed under J3420
CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 39 NDCs to J3420 for Cyanocobalamin. Billing units per package are CMS’s figures for this code’s unit.
| Drug | NDC (11-digit) | Labeler | Package | Billing units per package |
|---|---|---|---|---|
| Cyanocobalamin | 00143-9619-01 | Hikma Pharmaceuticals USA Inc. | 30 | 30 |
| Cyanocobalamin | 00143-9619-10 | Hikma Pharmaceuticals USA Inc. | 10 × 30 | 300 |
| Cyanocobalamin | 00143-9620-10 | Hikma Pharmaceuticals USA Inc. | 10 × 10 | 100 |
| Cyanocobalamin | 00143-9621-25 | Hikma Pharmaceuticals USA Inc. | 25 × 1 | 25 |
| Cyanocobalamin | 00404-9783-30 | Henry Schein Inc. | 30 | 30 |
| Cyanocobalamin | 00404-9786-10 | Henry Schein Inc. | 10 | 10 |
| Cyanocobalamin | 00404-9840-10 | Henry Schein Inc. | 10 | 10 |
| Cyanocobalamin | 00404-9995-30 | Henry Schein Inc. | 30 | 30 |
| Cyanocobalamin | 00517-0031-25 | American Regent, Inc. | 25 × 1 | 25 |
| Cyanocobalamin | 00517-0032-25 | American Regent, Inc. | 25 × 10 | 250 |
| Cyanocobalamin | 00517-0130-01 | American Regent, Inc. | 30 | 30 |
| Cyanocobalamin | 25021-0502-01 | Sagent Pharmaceuticals | 25 × 1 | 25 |
| Cyanocobalamin | 50090-2709-00 | A-S Medication Solutions | 25 × 1 | 25 |
| Cyanocobalamin | 50090-6229-00 | A-S Medication Solutions | 25 × 1 | 25 |
| Cyanocobalamin | 51662-1394-01 | HF Acquisition Co. LLC, DBA HealthFirst | 30 | 30 |
| Cyanocobalamin | 51662-1647-03 | HF Acquisition Co. LLC, DBA HealthFirst | 25 × 1 | 25 |
| Cyanocobalamin | 63323-0044-01 | FreseniUS Kabi USA, LLC | 25 × 1 | 25 |
| Cyanocobalamin | 63323-0044-44 | FreseniUS Kabi USA, LLC | 25 × 1 | 25 |
| Cyanocobalamin | 68001-0542-60 | BluePoint Laboratories | 25 × 1 | 25 |
| Cyanocobalamin | 68001-0640-60 | BluePoint Laboratories | 25 × 1 | 25 |
| Cyanocobalamin | 69680-0112-10 | Vitruvias Therapeutics, Inc. | 10 × 1 | 10 |
| Cyanocobalamin | 69680-0112-25 | Vitruvias Therapeutics, Inc. | 25 × 1 | 25 |
| Cyanocobalamin | 69680-0113-99 | Vitruvias Therapeutics, Inc. | 10 × 10 | 100 |
| Cyanocobalamin | 69680-0121-05 | Vitruvias Therapeutics, Inc. | 5 × 30 | 150 |
| Cyanocobalamin | 70069-0005-10 | Somerset Pharma, LLC | 25 × 1 | 25 |
| Cyanocobalamin | 70069-0171-10 | Somerset Pharma, LLC | 10 × 30 | 300 |
| Cyanocobalamin | 70069-0172-10 | Somerset Pharma, LLC | 10 × 10 | 100 |
| Cyanocobalamin | 70710-1663-07 | Zydus Pharmaceuticals (USA) Inc. | 25 × 1 | 25 |
| Cyanocobalamin | 70710-1664-06 | Zydus Pharmaceuticals (USA) Inc. | 10 × 10 | 100 |
| Cyanocobalamin | 70710-1664-07 | Zydus Pharmaceuticals (USA) Inc. | 25 × 10 | 250 |
| Cyanocobalamin | 70710-1665-01 | Zydus Pharmaceuticals (USA) Inc. | 30 | 30 |
| Cyanocobalamin | 70710-1665-05 | Zydus Pharmaceuticals (USA) Inc. | 5 × 30 | 150 |
| Cyanocobalamin | 70756-0635-25 | Lifestar Pharma | 25 × 1 | 25 |
| Cyanocobalamin | 71288-0300-02 | Meitheal Pharmaceuticals Inc. | 25 × 1 | 25 |
| Cyanocobalamin | 71288-0301-11 | Meitheal Pharmaceuticals Inc. | 10 × 10 | 100 |
| Cyanocobalamin | 71288-0302-30 | Meitheal Pharmaceuticals Inc. | 30 | 30 |
| Cyanocobalamin | 71288-0303-02 | Meitheal Pharmaceuticals Inc. | 25 × 1 | 25 |
| Cyanocobalamin | 71288-0303-92 | Meitheal Pharmaceuticals Inc. | 25 × 1 | 25 |
| Cyanocobalamin | 72603-0650-25 | Northstar RxLLC | 25 × 1 | 25 |
J3420: common questions
- Is J3420 a CPT code?
- No. J3420 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 J3420?
- CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 39 NDCs under J3420, for Cyanocobalamin. The table on this page shows each one with its billing units per package.
- What is the Medicare payment limit for J3420?
- $0.648 per 1000 mcg, 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.