---
title: "HCPCS J3420: Injection, vitamin b-12 cyanocobalamin, up to… | BillingBrief"
description: "HCPCS code J3420: Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/hcpcs/j3420/"
language: "en"
---

# J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg

HCPCS · [CMS code reference](#source)

**Official HCPCS description:** Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg

## Related codes

-   [`J2550` Injection, promethazine hcl, up to 50 mg HCPCS](https://billingbrief.com/hcpcs/j2550/)
-   [`J2795` Injection, ropivacaine hydrochloride, 1 mg HCPCS](https://billingbrief.com/hcpcs/j2795/)
-   [`J3111` Injection, romosozumab-aqqg, 1 mg HCPCS](https://billingbrief.com/hcpcs/j3111/)
-   [`J3301` Injection, triamcinolone acetonide, not otherwise specified, 10 mg HCPCS](https://billingbrief.com/hcpcs/j3301/)
-   [`J3489` Injection, zoledronic acid, 1 mg HCPCS](https://billingbrief.com/hcpcs/j3489/)
-   [`J3490` Unclassified drugs HCPCS](https://billingbrief.com/hcpcs/j3490/)

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/healthcare-common-procedure-system).
HCPCS Level II, October 2026 quarterly file.

Code set

HCPCS

Short name

Vitamin b12 injection

Section

Drugs administered other than oral method

Added to HCPCS

1986-01-01

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).