E10.3312 ICD-10-CM Code: Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema, left eye

E10.3312 is the ICD-10-CM diagnosis code for type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema, left eye. E10.3312 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering diabetes mellitus (e08-e13).

Under the CMS-HCC V28 risk adjustment model, E10.3312 maps to Diabetes with Chronic Complications (HCC 37) with a source-labeled community, non-dual, aged reference coefficient of 0.166. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

Coders should report E10.3312 only when the provider documentation supports the specific condition described, since more specific codes within the same hierarchy can capture additional clinical detail. For E10.3312, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.