J-Codes are specialized HCPCS Level II codes used in medical billing and coding to report injectable and infusion drugs administered by healthcare professionals. Accurate J-Code billing requires correct code selection, unit calculation, CPT pairing, modifier use, and supporting documentation. Common errors include miscalculated units, missing CPT codes, and unreported wastage. Frequently used J-Codes cover drugs like dexamethasone, infliximab, and ceftriaxone. Due to the complexity of J-Code billing, many practices benefit from offshore medical billing and coding services in India, such as ICS, which offer expertise, accuracy, and compliance for U.S. healthcare providers seeking efficient revenue cycle management.