Know When to Bill E/M Services Versus Eye Exam Codes
Plus — find out if you can bill both codes on the same claim. Choosing between evaluation and management (E/M) services and ophthalmological eye exam codes is one of the most common coding challenges in ophthalmology and optometry practices. Incorrect code selection can result in claim denials, undercoding, overcoding, and increased audit risk. Continue reading to gain knowledge of documentation requirements, medical necessity, payer policies, and the nature of the services provided during the patient encounter to distinguish between these categories. Understand the Eye Exam Codes Eye exam codes and E/M services codes aren’t interchangeable. Although both describe professional evaluation services, they’re intended to capture different types of encounters and documentation elements. Choosing the correct code depends on the patient’s condition, the extent of the history and examination, medical decision making (MDM), and whether the encounter meets the definition of an ophthalmological service. Eye exam codes include the following: The eye exam codes are divided into intermediate services, comprehensive services, new patient services, and established patient services. The comprehensive codes are specifically designed for ophthalmological services and include general evaluation of the complete visual system, history, general medical observation, external and ophthalmoscopic examination, gross visual fields, basic sensorimotor examination, and initiation of diagnostic and treatment programs. The intermediate ophthalmological codes cover evaluation of a new or existing condition with a “new diagnostic or management problem” that may or may not be tied to the patient’s primary diagnosis, per the CPT® guidelines. Intermediate codes also cover a history, general medical observation, external eye and adnexal exam, and more. The codes might also cover mydriasis for ophthalmoscopy. Unlike E/M services, eye exam codes don’t rely on MDM level selection under the revised 2021 E/M guidelines. Instead, they require documentation of the elements that support an intermediate or comprehensive ophthalmological service. Recognize E/M Services Report E/M services from the office and outpatient E/M section, including codes 99202-99205 (Office or other outpatient visit for the evaluation and management of a new patient …) for new patients and 99211-99215 (Office or other outpatient visit for the evaluation and management of an established patient …) for established patients. Since the 2021 E/M revisions, coders select office visit levels based on MDM or total physician or qualified healthcare professional time. The three elements that help determine the MDM level include the number and complexity of problems addressed, the amount and/or complexity of data reviewed and analyzed, and the risk of complications and/or morbidity or mortality of patient management. E/M services are often appropriate when the visit focuses heavily on systemic disease management, medication management, counseling, or complex MDM. Note Key Differences Between Eye Codes and E/M Codes One of the most important distinctions is that eye exam codes are procedure-oriented ophthalmological services, while E/M codes are cognitive services selected primarily based on MDM or total time. Eye codes focus on the evaluation and management of the visual system and generally include ophthalmic examination elements, refraction-related care, management of ocular disease, and the initiation or continuation of diagnostic and treatment programs. These programs may include ordering diagnostic testing, prescribing medications, recommending surgical intervention, establishing a monitoring schedule, or coordinating follow-up care. E/M codes, in contrast, emphasize the complexity of MDM and overall patient management. Factors such as the number and complexity of problems addressed, data reviewed and analyzed, prescription drug management, coordination of care, and time spent with the patient contribute to the selection of an E/M code. Eye exam codes and E/M services are alternative methods for reporting an ophthalmic evaluation. For a given patient encounter, the provider should select the code set that best reflects the services performed and the documentation provided. Reporting both an eye exam code and an E/M service for the same encounter is generally not appropriate because both code types describe the evaluation of the patient. Practices should also remember that payer policies vary significantly. Some commercial payers prefer E/M codes, while others continue to recognize eye exam codes routinely. Medicare allows either code set when documentation supports medical necessity and code requirements. See How Medical Necessity Determines Code Selection Medical necessity is the overarching criterion for choosing the correct code. The documentation must support why the service was performed and why the selected code level is appropriate. Example 1: Appropriate Use of an Eye Exam Code A new patient presented with complaints of blurred vision and difficulty reading. The ophthalmologist performed visual acuity testing, slit lamp examination, intraocular pressure (IOP) measurement, dilated fundus examination, assessment of cataracts, and discussion of treatment options. The provider diagnosed age-related cataracts and recommended monitoring. Appropriate coding: Assign 92004 to report a comprehensive ophthalmological service for a new patient. Rationale: The provider performed a comprehensive evaluation of the visual system, diagnosed age-related cataracts, and established a management plan that included ongoing monitoring. The documentation supports a comprehensive ophthalmological service with initiation of a diagnostic and management program. Example 2: Appropriate Use of an E/M Service Code An established patient with primary open-angle glaucoma presented for pressure management. During the visit, the provider reviewed medication compliance, analyzed prior optical coherence tomography (OCT) and visual field results, evaluated IOP, adjusted medication due to inadequate pressure control, and discussed risks of progression. The physician documented moderate MDM due to chronic illness progression and prescription drug management. Appropriate coding: Use 99214 (Office or other outpatient visit … established patient … moderate level of medical decision making ...) for an established patient visit with moderate MDM. Rationale: The encounter is driven primarily by MDM involving chronic disease management and prescription medication adjustment. Example 3: When Either Code Set May Be Appropriate An established diabetic patient presented for a diabetic retinal evaluation. The provider: Depending on documentation specifics, the visit could support either: Remember: The provider would report one code or the other, not both. Rationale: This encounter may support either an eye exam code or an E/M code depending on the primary focus of the documentation. If the record supports a comprehensive evaluation of the visual system and includes the continuation of a diagnostic or treatment program, such as ongoing monitoring for diabetic retinopathy with scheduled follow-up examinations and communication of findings to the patient’s primary care provider, a comprehensive eye exam code such as 92014 may be appropriate. Conversely, if the documentation primarily reflects MDM related to the management of diabetic eye disease, review of diagnostic data, and coordination of care, an E/M service such as 99213 may be supported. The determining factor is the content of the documentation and whether the requirements of the selected code set are met. This example demonstrates why documentation content, not diagnosis alone, determines the correct code selection. Consider Each Payer’s Policies Some payers impose frequency limitations on eye exam codes, especially comprehensive services. Others may bundle certain ophthalmic testing differently depending on whether an E/M or eye exam code is billed. Practices should routinely verify payer-specific coverage policies, frequency edits, modifier requirements, medical necessity standards, and documentation expectations. Examine These Documentation Best Practices To support proper code selection, providers should clearly document the chief complaint, medical necessity, examination findings, assessment and diagnosis, diagnostic testing reviewed, treatment plan, medication management, patient counseling, and coordination of care. For E/M codes specifically, documentation should clearly support the level of MDM or total time reported. Meanwhile, for eye exam codes, documentation should show the required ophthalmological service elements and any initiation or continuation of diagnostic and treatment programs. Watch out for These Common Coding Errors Common coding errors when choosing between E/M and eye exam codes include: Regular coding audits and provider education can help reduce these issues and improve compliance. Conclusion Choosing between an E/M service and an ophthalmological eye exam code requires careful evaluation of the documentation, medical necessity, and nature of the patient encounter. Eye exam codes focus on ophthalmological evaluation of the visual system, while E/M services emphasize MDM and overall patient management. Accurate code selection is essential for compliance, reimbursement integrity, and audit readiness. Coders and providers must work together to ensure documentation supports the selected code set and aligns with CPT® definitions and payer requirements. Understanding the distinctions between eye exam and E/M services codes helps ensure accurate code selection, supports compliance, and promotes appropriate reimbursement. Rebecca Greenlaw CPC, CPCO, COPC,
Coding and Reimbursement Consultant, Corcoran Consulting Group
