J-Code
HCPCS Level II codes (J0000-J9999) used to bill drugs administered other than by oral method.
1 min read · Last reviewed May 23, 2026
At a glance
- Category
- Billing
- Primary sources
- 1
- Workspace handoff
- revenue audit →
Where this comes up
This shows up in revenue-cycle work — claim scrubbing, charge entry, posting, A/R follow-up, and month-end close. Billers and practice managers hit this term when reconciling a payment, working a denial queue, or auditing why a claim aged past 60 days.
Full definition
What it is in practice
CMS HCPCS Level II maintains the J-code set. Each J-code specifies the drug and the billable unit (e.g., per mg, per vial).
How it shows up in your practice
Billing units must match the drug NDC and dose. Errors here are common and material — a 1-vs-100 unit mistake on a chemotherapy J-code can lose substantial revenue.
Sources
- CMS — HCPCS Level IIhttps://www.cms.gov/medicare/coding-billing/healthcare-common-procedure-system-hcpcs-level-ii-coding-procedures
Audit J-code billing in Revenue Audit
Open revenue audit →Related terms
- BillingHCPCS Level IIThe CMS-maintained code set covering products, supplies, and services not included in CPT — primarily durable medical equipment, drugs, and Medicare-specific services.
- BillingNDC (National Drug Code)FDA-assigned 10-digit identifier for FDA-approved drugs and biologics.
- BillingModifier JWHCPCS modifier indicating drug amount discarded from a single-use vial or single-use package.
- Billing340B Drug PricingHRSA-administered drug-discount program that lets eligible safety-net providers buy outpatient drugs at reduced prices.
D3rx is a healthcare-billing and compliance research aid maintained by D3rx Inc. Articles are drafted by an LLM (Anthropic Claude) against primary HHS, OCR, CMS, eCFR, NIST, and state-regulator publications, and reviewed for restraint and source fidelity by the D3rx team.
Reviewer status: a named credentialed reviewer (CHC, CHPC, or healthcare attorney) is being engaged. Until that engagement is finalized, this page does not claim credentialed review.
Related across the archive
- GlossaryHCPCS Level IIThe CMS-maintained code set covering products, supplies, and services not included in CPT — primarily durable medical equipment, drugs, and Medicare-specific services.
- GlossaryModifier JWHCPCS modifier indicating drug amount discarded from a single-use vial or single-use package.
- GlossaryNDC (National Drug Code)FDA-assigned 10-digit identifier for FDA-approved drugs and biologics.
- Glossary340B Drug PricingHRSA-administered drug-discount program that lets eligible safety-net providers buy outpatient drugs at reduced prices.
- GlossaryG-CodeHCPCS Level II codes (G0000-G9999) for procedures and services that do not have CPT codes — primarily Medicare temporary or Medicare-specific services.
- GlossaryModifier RT / LTHCPCS modifiers identifying procedures performed on the right (RT) or left (LT) side of the body.
- GlossarySurgical Pathology Codes (88300-88309)CPT codes for surgical pathology specimen examination, stratified by specimen complexity.
- BillingAWV + Problem Visit Same Day: How to Bill CorrectlyYes, you can bill AWV and a problem visit the same day. Here's how to do it correctly with modifier -25.
This glossary entry is a research aid for billing and compliance staff. It does not provide legal, medical, or financial advice and does not replace counsel. References cited link to primary sources at HHS, OCR, CMS, eCFR, NIST, and the relevant payer or industry body.