How to Use Modifier 24 to Avoid Claim Denials: Proven Billing Best Practices and Common Pitfalls
Medical BillingThere’s nothing as frustrating as claim denial, especially if you are a healthcare professional. You treat patients, document visits, and follow protocols, only to see insurance reject an E/M service because it was mistakenly bundled with surgery. That’s where modifier 24 comes in. Using modifier 24 correctly makes sure unrelated evaluation and management services are billed separately. Most denials happen because documentation for modifier 24 is unclear or the coding is off. In this blog post, we will cover appropriate use of modifier 24, common denials, and actionable suggestions for changing denials to approvals. What Is Modifier 24? Let’s start with the definition first. Modifier 24 is used for evaluation and management services that are unrelated to a patient’s surgery during the postoperative period. It signals to insurers that the visit is separate from the global surgical care. Modifier 24 applies only to E/M services, not procedures or diagnostic tests. For example, a patient who underwent knee surgery may return a few weeks later with flu symptoms. The E/M service for the flu is unrelated to the surgery. Billing it with modifier 24 tells the insurer that it is separate and should not be included in the knee surgery global payment. Why Correct Use Matters An improper use of modifier 24 will cause lost claims and delays in payment, which delays revenue and adds additional work for your billing team. Most denials occur when the documentation for modifier 24 is not clear or when a service is billed incorrectly. Writing very detailed notes that track the patient’s condition and give reasoning why a visit is unrelated will help claims get approved faster and limit future follow-ups for still undecided claims. Best Practices for Using Modifier 24 1. Understand the Global Surgical Period Every surgery comes with a defined global period, typically 0, 10, or 90 days. Modifier 24 should only be used if an unrelated E/M service happens during this time. Billing outside this period can lead to denials. Understanding these timeframes is key to smooth claims processing. 2. Document Thoroughly and Clearly Documentation for modifier 24 should clearly show that the visit is unrelated to the surgery. Document the patients condition, the reason for the visit, and how that visit is different from the care you provide postoperatively. Clear notes protect your claim and are helpful during an audit. 3. Apply Modifier 24 Only to E/M Codes Modifier 24 is only for evaluation and management services. Using it on procedures or diagnostic tests can trigger a rejection. Correct code use is one of the simplest ways to reduce denials. 4. Distinguish From Modifier 25 Modifier 25 is for unrelated same-day visits, but not during a postoperative period. Confusing the two is common and leads to incorrect claims. Understanding the difference ensures billing accuracy. 5. Train Your Team Regularly Billing staff should be clear on when and how to use modifier 24. Regular training reduces errors and makes sure documentation for modifier 24 is complete. 6. Conduct Periodic Audits With regular audits, it’s easy to identify errors and compliance issues. If the team reviews claims and goes through trends regularly, then the team can address concerns and issues before they become more serious. 7. Follow Payer-Specific Rules Typically, there are subtle differences among the guidelines of insurers when it comes to medical billing and the use of modifier 24. Staying current on each payer’s guidelines offers assurance that you will submit the claim correctly and in a timely manner. Common Pitfalls and How to Avoid Them Unclear Documentation Most denials happen when the notes don’t clearly explain why the visit is unrelated. Always provide complete, detailed records. Billing for Related Services Modifier 24 should never be used for services related to the surgery or complications. Those services are already included in the global payment. Using Modifier 24 Outside the Global Period Applying modifier 24 before or after the global period is incorrect and will likely lead to denials. Confusing Modifier 24 With Modifier 25 Mixing these up is a frequent error. Remember, modifier 25 is for same-day visits outside the postoperative period. Example Scenario A patient has cataract surgery with a 90-day global period. Two weeks later, the same doctor evaluates the patient for an unrelated respiratory infection. The E/M service should be billed with modifier 24. Clear documentation demonstrating the visit is unrelated to the cataract surgery increases the likelihood of claim approval. Conclusion It does not have to be a huge headache for healthcare providers when it comes to postoperative billing. When modifier 24 is used correctly, thorough documentation is kept for modifier 24 services, and proper training for staff is conducted, financial loss from excessive denials can be minimized, and revenue can be protected. Performing regular audits and making sure the facility is aware of current payer rules and regulations, can also contribute to reducing denials. This approach will help make sure that any unrelated E/M services provided by the healthcare provider are reimbursed properly, allowing the healthcare provider to concentrate on the patient, not on following up on claims.