Summary & Overview
HCPCS Level II M1429: Retinal Exam Finding with Retinopathy
HCPCS Level II code M1429 documents a retinal examination finding with evidence of retinopathy in the left, right, or both eyes and a recorded severity level. Nationally, a discrete code for retinopathy severity supports clearer clinical documentation, population-level tracking of diabetic and other retinopathies, and more precise claims reporting for ophthalmic diagnostic encounters. This matters for quality measurement, outcomes monitoring, and administrative clarity across outpatient eye care providers.
Key payers addressed in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how the code is used in clinical documentation and billing, typical sites of service for claims, and what elements are necessary in the medical record to support the code’s use. The publication outlines benchmark and utilization topics where available, summarizes policy implications for national payers, and situates M1429 within broader ophthalmology diagnostic coding practice.
This summary is written for a national audience and focuses on clinical context, billing usage, and payer relevance rather than state-specific policy guidance.
Billing Code Overview
HCPCS Level II code M1429 denotes a retinal exam finding with evidence of retinopathy in left, right or both eyes with severity level documented. This code captures a documented ophthalmic examination result indicating retinopathy and a recorded severity assessment for one or both eyes.
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Service type: Eye diagnostic exam documenting retinal findings and severity
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Typical site of service: Ophthalmology or optometry clinic, outpatient eye specialty center, or other ambulatory care settings where retinal examinations are performed
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient with type 2 diabetes presents to an ophthalmology clinic for routine diabetic retinopathy surveillance. The clinician performs a dilated retinal examination noting microaneurysms, dot-blot hemorrhages, and evidence of nonproliferative diabetic retinopathy in the right eye and more advanced changes in the left eye. The clinician documents the laterality (right, left, or bilateral) and assigns a severity level (mild, moderate, severe nonproliferative, or proliferative) in the office note. The retinal exam finding with documented retinopathy severity is recorded in the encounter and coded to M1429 for billing purposes. Typical workflow includes patient intake and history, visual acuity testing, intraocular pressure measurement, pupil dilation, slit-lamp and indirect ophthalmoscopy or fundus photography, documentation of retinopathy severity and laterality, and discussion of follow-up or treatment planning.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management service by the same physician on the same day of the procedure | Use when a distinct E/M visit is performed and documented on the same date as the retinal exam finding entry |
26 |