CPT Code 99204- Billing Guide for New Patient Evaluation
Accurate use of medical codes (CPT codes) is very important to ensure compliance and timely reimbursements for any healthcare practice. The most commonly used new patient evaluation code is 99204 and holds significant importance for providers when they see a new patient in an office or outpatient setting. These new patient visits require a medically appropriate history and/or examination, reasonable level of decision-making. and comprehensive documentation. Hence, the correct use of such codes ensures appropriate reimbursement in the future. What Defines a “New Patient”? A patient can be considered ‘new’ in a condition when they have not received any kind of medical services from the physician or another physician of the same specialty within the same group practice in the last three years of time span. If they have, then they are considered “established patients,” and different CPT codes are applied in this case for billing purposes. What is CPT code “99204″? As per AMA 2024, 99204 is an office or other outpatient visit for the evaluation and management of a new patient, which requires a medically appropriate history and/or examination and a moderate level of medical decision-making. When using time for code selection, 45-59 minutes of total time is spent on the date of the encounter. Key Components for CPT Code 99204 Selection: There are two components on which the CPT 99204 code can be selected. These are Medical Decision Making (MDM) OR Total Time duration 1. Medical Decision Making (MDM): Moderate Complexity To meet the moderate level of MDM, the encounter of the patient with the provider must have at least two out of three of the following elements: Number and Complexity of Problems Addressed: During the encounter, a number of significant health problems are addressed. This may include an understanding of a worse chronic illness, giving treatment to a new and complex acute illness, or examining a new illness with an unclear outlook. Amount and/or Complexity of Data to be Reviewed and Analyzed: This includes a review of previous external notes, tests, or discussions with other or different providers. Interpretation of illness-related medical diagnostic tests. Risk of Complications or Mortality of Patient Management: It involves various things with moderate risk, such as prescription drug management or starting a new medicine with certain side effects, adjusting an intricate medication regimen, decisions related to elective major surgery in which factors without identified risk factors, or diagnosis or treatment that poses moderate risk to the patient. 2. Total Time Spent: In the case of a bill based on time, the total time spent by the provider on the date of the encounter must be between 45 and 59 minutes. Important Note on Time: “Total time” includes both the times whether it is face-to-face or non-face-to-face time spent by the physician on the date of the encounter. This can include: Reviewing patient medical records prior to the visit. Performing the physical examination of the patient. Counseling and educating the patient/family. Ordering tests or procedures. Referring to other healthcare professionals. Documenting the patient’s medical record. Interpreting results (if not separately billed). Care coordination (if not separately billed). Documentation Requirements for CPT Code 99204: Accurate and thorough documentation is necessary to avoid denials and ensure proper reimbursement. Here’s what should be included: Chief complaint: The primary reason for the visit. History of present illness (HPI): A detailed description of the patient’s illness, including location, quality, severity, duration, timing, context, modifying factors, and associated signs and symptoms. and relevant past, family, and social history Review of systems (ROS): A thorough review covering multiple body systems. Examination findings: Examination of multiple organ systems or a single complex system, with documentation of findings. Assessment and plan with justification for treatment and follow-up Documentation of time: Clearly mention the accurate starting and ending times of the encounter, or the exact total time spent by the provider on the date of service. Medical necessity: Even if billing is done on the basis of time, the documents must support the medical necessity of the visit and the services provided to the patient. Regardless of whether you choose MDM or time for code selection, thorough and accurate documentation is paramount. Your medical record must clearly support the chosen code. Billing MIstakes to avoid while coding 99204: Upcoding or Downcoding- Practices must code based on the actual complexity and documentation. Therefore, it is important that the practices have certified and trained coders to ensure correct coding and accurate insurance reimbursements. Not Documenting Time- If using a time approach, then practices should ensure that it is explicitly mentioned and justified. Missing New Patient Criteria- A patient is considered new only when they haven’t received professional services in the past 3 years from the same provider or group with the same specialty. The coders should be mindful of this while mentioning the CPTs. Reimbursement Guidelines for CPT 99204: The reimbursement you get for CPT 99204 is different everywhere and not fixed. It changes a lot based on where you are, the insurance company, like Medicare or others, and other related details. It is important to check the payment rates of your insurance companies. You should carefully follow all these guidelines and keep detailed patient records; your practice can ensure accurate billing for CPT Code 99204, optimize your reimbursement, remain compliant with coding regulations, and avoid any problems with billing rules. Payer Average Reimbursement for CPT 99204- Medicare (2025) $160-$190 Commercial Plans $167-$220 How StafGo Health can Help you bill E&M Correctly At StafGo Health, we have a specialised team that is certified in E&M coding and ensures maximizing your collections with the use of correct codes and guidelines. Here is how we support your practice- Comprehensive Documentation Review Training for providers and staff to document for code 99204 Ensuring clean claim submissions Regular Audit Support Interactive Revenue Monitoring Conclusion CPT code 99204 represents a critical billing opportunity for the practices seeing new patients with moderate to high complexity, and by understanding these requirements and partnering with a trusted and experienced RCM






