E11.3212 Type 2 diabetes mellitus with mild nonproliferative diabetic retinopathy with macular edema, left eye

ICD-10-CM E11.3212: Type 2 diabetes mellitus with mild nonproliferative diabetic retinopathy with macular edema, left eye

ICD-10-CM code E11.3212 identifies type 2 diabetes mellitus with mild nonproliferative diabetic retinopathy with macular edema in the left eye. Diabetic macular edema is a vision-threatening complication of diabetes involving retinal swelling. This code appears in terminology records, billing guidelines, and research data mappings. 1 2 3 6

Plain-language overview

Code E11.3212 identifies a diagnosis of type 2 diabetes mellitus accompanied by mild nonproliferative diabetic retinopathy and macular edema specifically in the left eye. 1

Diabetic macular edema is a vision-threatening complication of diabetes where persistent blood glucose elevation damages eye capillaries, resulting in retinal swelling and progressive vision loss. 2

What this code represents

The terminology record classifies E11.3212 as a disease or syndrome, maintaining an active status for the 2026 version of ICD-10-CM with a published abbreviation for the left eye condition. 1

Within the coding hierarchy, E11.3212 is a narrower concept under the parent code E11.321, which describes type 2 diabetes with mild nonproliferative diabetic retinopathy with macular edema without specifying laterality. 1

Coding details

The E11.3212 code is distinct from E11.3292, which represents type 2 diabetes with mild nonproliferative diabetic retinopathy without macular edema in the left eye. 3

While E11.3212 specifies type 2 diabetes in the left eye, other codes in the same billing list identify drug-induced diabetes or type 1 diabetes with identical retinopathy and macular edema characteristics. 3

Documentation considerations

Clinical research criteria for diabetic macular edema include macular thickening involving the center of the fovea measured by spectral domain OCT, alongside specific hemoglobin A1C and visual acuity thresholds. 2

What the sources add

Beyond standard terminology records, this specific diagnosis code appears in Medicaid billing guidelines for biologics and within FHIR real-world data examples for diabetes conditions. 3 6

A phecode mapping system groups E11.3212 with other type 2 diabetes retinopathy variants, including right eye, bilateral, and unspecified eye presentations with or without macular edema. 4

Sources

1. ICD-10-CM E11.3212 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Aflibercept Injection, for Intravitreal Use (Eylea® HD) HCPCS Code J3590 - Unclassified Biologics: Billing Guidelines — medicaid.ncdhhs.gov; accessed 2026-07-27.
4. Phecode 250.23 · ExPRSweb — csg.sph.umich.edu; accessed 2026-07-27.
5. Article - Therapeutic Shoes for Persons with Diabetes - Policy Article (A52501) — cms.gov; accessed 2026-07-27.
6. HL7.FHIR.UV.VULCAN-RWD\Diabetes Example Condition Codes - FHIR v4.0.1 — build.fhir.org; accessed 2026-07-27.