Summary & Overview
HCPCS G9974: Dilated Macular Exam with Documentation of Macular Degeneration Severity
HCPCS Level II code G9974 designates a dilated macular examination with documentation of macular thickening, geographic atrophy, hemorrhage, and the level of macular degeneration severity. This code captures a focused diagnostic clinical assessment used in the evaluation and monitoring of age-related macular degeneration (AMD) and other macular pathology. Nationally, standardized documentation of macular findings supports clinical decision-making, care coordination, and consistent claims capture for ophthalmic services.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical intent of the code, common sites of service, and the role of the exam in ophthalmic care. The publication also summarizes payer coverage patterns when available, coding context for outpatient ophthalmology and optometry settings, and relevant billing considerations such as documentation elements that align with the code description.
The report provides benchmarks and policy context where data are available and notes when input data are incomplete. It is written for a national audience of policy analysts, revenue cycle professionals, and clinicians interested in ophthalmic billing and documentation practices, offering concise background and practical context for use of G9974 in outpatient eye care.
Billing Code Overview
HCPCS Level II code G9974 represents a dilated macular exam performed, including documentation of the presence or absence of macular thickening, geographic atrophy, or hemorrhage, and the documented level of macular degeneration severity. This service evaluates the macula using a dilated fundus examination to assess structural changes associated with macular degeneration and related retinal conditions.
Service type: Ophthalmologic diagnostic exam
Typical site of service: Ophthalmology or optometry clinic, outpatient eye care center, or other ambulatory care settings where dilated retinal examinations are performed.
Clinical & Coding Specifications
Clinical Context
A typical patient is an older adult with known or suspected age-related macular degeneration (AMD) presenting to an ophthalmology clinic or ambulatory surgical center for a comprehensive dilated macular exam. The patient history often includes progressive central vision loss, metamorphopsia, difficulty reading, or new onset blurred central vision. The clinical workflow begins with visual acuity and Amsler grid testing, followed by dilation with mydriatic drops. The ophthalmologist or retina specialist performs slit-lamp biomicroscopy with a posterior pole lens and indirect ophthalmoscopy to evaluate the macula for thickening, geographic atrophy, hemorrhage, drusen, pigmentary changes, and to assign a level of macular degeneration severity. Ancillary testing such as optical coherence tomography (OCT) and fundus photography may be ordered; findings from OCT often guide documentation of macular thickening or subretinal/intraretinal fluid. The provider documents the presence or absence of macular thickening, geographic atrophy, or hemorrhage and records the AMD severity level in the medical record. The service is typically billed when a dilated macular examination and macular severity documentation are completed during an office visit or retinal evaluation.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when the dilated macular exam requires substantially greater work than typically required (extensive documentation, prolonged exam due to complex findings). |