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Nafcillin 100 MG/ML Injectable Solution — RxCUI 239189

Name: Nafcillin 100 MG/ML Injectable Solution (RxCUI 239189)
Creator: Brian Staiger, PharmD

RxNorm drug concept · Semantic clinical drug

RxCUI 239189 Semantic clinical drug · SCD ● Current RxNorm concept 7 FDA products 7 package NDCs Snapshot Jul 14, 2026

This page is curated, coded, and maintained by Dr. Brian Staiger, PharmD

Compiled from public NLM RxNorm and FDA (openFDA NDC directory) data sources. Editorial policy

What you’re looking at: the standardized identity of one medicine, as the U.S. drug-data system sees it. Below — every FDA-listed product, package code, price benchmark, and billing code that maps to it.

🗂️ Key Facts

RxCUI239189

Official nameNafcillin 100 MG/ML Injectable Solution

Concept typeSemantic clinical drug (SCD)

RxNorm statusCurrent RxNorm concept

Also known asnafcillin (as nafcillin sodium) 100 MG/ML Injectable Solution

FDA products mapped7

Package NDCs mapped7

Reported Medicaid activity (SDUD)646 prescriptions · 16 state & territory Medicaid programs · latest period Q4 2025

RxNorm release07/06/2026

Snapshot dataJul 14, 2026

📖 Skip the Codes — Read It in Plain English.

Our pharmacist-built guide to Nafcillin Injection: what it is, how it’s used, side effects, and interactions.

📗 Our plain-language guide HelloPharmacist

Nafcillin is used specifically for infections caused by staphylococci — a type of bacteria — that have become resistant to regular penicillin. These 'penicillinase-producing' staph...
What kind of infection is nafcillin used for?
NAFCILLIN Injection is formulated to be given directly into a vein (IV) or into a muscle (IM). This route allows the medication to get into your bloodstream quickly and reach effec...
Why is it given as an injection instead of a pill?

📖 Read our full Nafcillin Injection guide →

🕸️ Concept Web — How Nafcillin 100 MG/ML Injectable Solution Connects

One RxCUI never lives alone. Follow the path from the raw ingredient down to the exact strength-and-form concepts FDA products carry — every stop is a real RxNorm concept with its own identifier. Hover or focus any chip for what it means.

This page's concept Nafcillin 100 MG/ML Injectable Solution RxCUI 239189 Semantic clinical drug · SCD

Every web starts here: one RxCUI, one fixed meaning in the RxNorm vocabulary.

Ingredients 1

The active substance itself — no strength, form, or brand attached yet.
- Nafcillin 7233 IN
Dose forms 4

The ingredient poured into a form — tablet, solution, cream — still without one fixed strength.
- Nafcillin Injectable Solution 372980 SCDF
- Nafcillin Injectable Product 1156404 SCDG
- Injectable Solution 316949 DF
- Injectable Product 1151126 DFG
Clinical & branded drugs 1

Ingredient + strength + dose form. These are the concepts real FDA products actually carry.
- Nafcillin 100 MG/ML 328386 SCDC

Showing up to 8 concepts per family — 6 of 6 stored related concepts drawn.

These are official RxNorm vocabulary relationships — how concepts name and organize the same medicine. They do not establish therapeutic equivalence or substitutability: two concepts appearing in one web is never a statement that products can be swapped.

🔀 Generic ⇄ Brand Crosswalk

The same medicine has an unbranded (generic) identity and one or more brand-name identities — each with its own RxCUI. This is a naming relationship in RxNorm, not a statement that any two products are substitutable.

Generic (Clinical) Concepts

Nafcillin 100 MG/ML SCDC · 328386
Nafcillin Injectable Solution SCDF · 372980
Nafcillin Injectable Product SCDG · 1156404

📦 FDA Products & Package NDCs

7 products · 7 package NDCs

7 package NDCs map to RxCUI 239189 in the current snapshot — up to 50 per page. Each linked NDC opens its full package page.

Package NDC	Package	Brand / generic name	Labeler	Marketing start
25021-0198-99	1 VIAL in 1 CARTON (25021-198-99) / 100 mL in 1 VIAL	Nafcillin	Sagent Pharmaceuticals	2025-04-15
44567-0223-01	1 VIAL, PHARMACY BULK PACKAGE in 1 CARTON (44567-223-01) /...	Nafcillin	WG Critical Care, LLC	2011-04-27
55150-0124-09	1 VIAL, PHARMACY BULK PACKAGE in 1 BOX (55150-124-09) / 100...	Nafcillin	Eugia US LLC	2012-12-26
55150-0124-99	1 VIAL, PHARMACY BULK PACKAGE in 1 BOX (55150-124-99) / 100...	Nafcillin	Eugia US LLC	2012-12-26
63323-0330-60	1 VIAL, PHARMACY BULK PACKAGE in 1 CARTON (63323-330-60) /...	Nafcillin	Fresenius Kabi USA, LLC	2011-04-27
72603-0567-01	1 VIAL, PHARMACY BULK PACKAGE in 1 CARTON (72603-567-01) /...	Nafcillin	NorthStar Rx, LLC	2024-03-01
83634-0101-99	1 BOTTLE in 1 CARTON (83634-101-99) / 100 mL in 1 BOTTLE	Nafcillin	Avenacy Inc.	2025-02-01

Observed labelers: Eugia US LLC (2) · Avenacy Inc. (1) · Fresenius Kabi USA, LLC (1) · NorthStar Rx, LLC (1) · Sagent Pharmaceuticals (1) · WG Critical Care, LLC (1) — this is the FDA-listed mapping footprint, not sales, inventory, availability, or market share.

🧾 Billing Codes (HCPCS)

Medical billing codes (HCPCS "J-codes") that connect to this concept's packages — used mostly when a clinic or hospital bills for a drug it administers. Each code links to its full billing page.

Code	Descriptor	Mapped packages	Sources
J2290	Inj, nafcillin sodium, 20 mg	7	CMS

⚠ A crosswalk is not coverage: an NDC↔HCPCS mapping does not guarantee any payer covers or pays the code. Always verify the current payer policy before billing.

🗃️ Sources & Limits

Atlas generation902fddb9-e9c1-4004-bf4c-dba4d51037c7

openFDA export observedJul 14, 2026

RxNorm release07/06/2026

Methodology2026-07-full-catalog-v1

A shared RxCUI does not prove interchangeability. Products mapped to the same concept are not thereby equivalent or substitutable — equivalence is a separate, product-level determination.
Listing here does not establish approval or coverage. Appearing in this snapshot is a data observation, not an FDA approval status or a payer coverage decision.
Missing data never means zero. A silent dataset (no price, no billing code, no utilization) means no observation — not that the real-world value is zero.
Counts describe the mapping footprint. Product, package, and labeler counts are the FDA-listed mapping footprint in this snapshot — not sales, inventory, availability, or market share.

This product uses publicly available data from the U.S. National Library of Medicine (NLM), National Institutes of Health, Department of Health and Human Services; NLM is not responsible for the product and does not endorse or recommend this or any other product.

Machine-readable JSON

Reference information about drug-concept identifiers and public regulatory data — not medical advice. Talk to your pharmacist or prescriber about your own medication.