Don't forget about the modifier. Missing or incorrect usage of modifiers is the most common reason that claims are rejected by payors. Leave off a modifier, or put in the wrong one, and your claim may be denied or paid the wrong amount. Coding with Modifiers: A Guide to Correct CPT and HCPCS Level II Modifier Usage provides step-by-step guidance for the proper use of CPT and HCPCS modifiers. Also included are specific requirements for modifier usage in both professional service and hospital reporting. Information right from the source. The AMA's CPT nomenclature uses modifiers as an integral part of its structure. Organized by modifier. Makes learning correct modifier coding easier. Contains both CMS and AMA modifier guidelines. Guidelines are designated with a symbol for easy identification and understanding of each interpretation. Decision Tree Flow Charts. Lead to determination of the correct code. Real-life clinical examples and definitions for each modifier. Helps you know if a modifier is being used correctly. Chapter exercises and test-your-knowledge quizzes. Ensure understanding of the material. Mid-term and final examinations. Provided in a variety of formats to facilitate learning. Coding tips. Provide hints on correct modifier usage. Hospital and Ambulatory Surgery Centers reporting requirements. A special section is dedicated to modifiers approved for hospitals and ambulatory surgery centers