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E11.3311

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🧬ICD-10 CM E11.3311 - Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema, right eye

Overview

ICD-10 CM E11.3311 is a specific combination code used to classify Type 2 diabetes mellitus complicated by moderate nonproliferative diabetic retinopathy (NPDR) accompanied by macular edema, specifically localized to the right eye. This code captures the systemic disease, the specific ocular complication, the severity of the retinopathy, the presence of edema, and the laterality in a single alphanumeric string.

Using combination codes like E11.3311 is essential for accurate risk adjustment, severity of illness scoring, and ensuring appropriate reimbursement in both outpatient and inpatient settings. It eliminates the need for multiple codes to describe the relationship between the diabetes and the eye condition.

Code Breakdown

The structure of E11.3311 follows the ICD-10-CM taxonomy:

SegmentValueDescription
CategoryE11Type 2 diabetes mellitus
SubcategoryE11.3Type 2 diabetes mellitus with ophthalmic complications
ExtensionE11.33Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy
Further ExtensionE11.331Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema
Laterality1Right eye

Laterality Specifics

  • 1: Right eye
  • 2: Left eye
  • 3: Bilateral
  • 9: Unspecified eye

Laterality Requirement

When documenting diabetic retinopathy with macular edema, the specific eye affected must be documented. If bilateral, use E11.3313. If unspecified, use E11.3319, though unspecified codes should be avoided when clinical documentation supports specificity.

Coding Guidelines

Includes

  • Type 2 diabetes mellitus with moderate NPDR.
  • Presence of macular edema associated with the retinopathy.
  • Diabetes mellitus NOS (if documented as Type 2).
  • Adult-onset diabetes (if documented as Type 2).
  • Ketosis-resistant diabetes (if documented as Type 2).

Excludes

  • Type 1 Diabetes: If the patient has Type 1 diabetes, codes from category E10 must be used (e.g., E10.3311).
  • Drug/Chemical Induced: If diabetes is caused by drugs or chemicals, use category E09.
  • Other Specified Diabetes: Use category E13 for other specified types.
  • Proliferative Retinopathy: If the retinopathy is severe or proliferative, codes from the .34 or .35 series are required (e.g., E11.3511).
  • Macular Edema without Retinopathy: If macular edema exists without diabetic retinopathy, this code is invalid.

Use of Additional Codes

While E11.3311 is a combination code, additional codes may be required to fully capture the clinical picture:

  • Long-term insulin use: Z79.4 (if the patient uses insulin, even though it is Type 2).
  • Long-term use of oral hypoglycemic drugs: Z79.84.
  • Insulin pump status: Z99.1 (if applicable).
  • Body Mass Index (BMI): Z68.- (if documented).
  • Visual Impairment: If the patient has blindness or low vision due to the condition, add codes from H54.-.

Risk Adjustment (HCC)

Hierarchical Condition Category (HCC) status is critical for Medicare Advantage and ACA plans.

  • HCC Status: Yes CMS-HCC V28
  • HCC ID: 18 (Diabetes with Chronic Complications)
  • RAF Impact: This code contributes to the Risk Adjustment Factor (RAF) score. Diabetes with chronic complications (like retinopathy) carries a higher risk weight than uncomplicated diabetes.
  • Recapture: This condition must be documented and coded at least once per calendar year to maintain the HCC status for risk adjustment purposes.

Inpatient Impact (MS-DRG)

In the inpatient setting, E11.3311 influences the Medicare Severity Diagnosis Related Group (MS-DRG) assignment through Complication/Comorbidity (CC) logic.

  • CC/MCC Status: CC (Complication/Comorbidity) CMS MS-DRG v42
  • Impact: The presence of this code may shift a DRG from a “without CC/MCC” tier to a “with CC” tier, increasing the relative weight and reimbursement for the stay.
  • POA Indicator: Present on Admission (POA) reporting is required for inpatient claims. If the retinopathy was present before admission, mark Y.

Code Tree

Chapter 4: Endocrine, Nutritional and Metabolic Diseases (E00-E89)
└── Diabetes mellitus (E08-E13)
    └── Type 2 diabetes mellitus (E11)
        └── Type 2 diabetes mellitus with ophthalmic complications (E11.3)
            └── Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy (E11.33)
                └── Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema (E11.331)
                    └── E11.3311 (Right eye)
                    └── E11.3312 (Left eye)
                    └── E11.3313 (Bilateral)
                    └── E11.3319 (Unspecified eye)

Clinical Coding Examples

Example 1: Routine Follow-up

Scenario: A patient with known Type 2 diabetes presents for a routine ophthalmology follow-up. Dilated exam reveals moderate nonproliferative diabetic retinopathy with macular edema in the right eye. Left eye is clear. Coding:

Example 2: Bilateral Involvement

Scenario: Patient has Type 2 diabetes. Exam shows moderate NPDR with macular edema in both eyes. Coding:

Example 3: Progression to Proliferative

Scenario: Patient previously coded with E11.3311 returns. Exam now shows proliferative diabetic retinopathy in the right eye with macular edema. Coding:

  • Primary: E11.3511 (Type 2 diabetes with proliferative diabetic retinopathy with macular edema, right eye).
  • Note: The code changes to reflect the increased severity.

Example 4: Unspecified Laterality

Scenario: Documentation states “Diabetic retinopathy with macular edema” but does not specify left or right, and the provider cannot be queried before claim submission. Coding:

  • Primary: E11.3319

  • Note: Query the provider to specify laterality whenever possible to avoid unspecified codes.

Revenue Cycle Considerations

  • wRVU: Not Applicable. ICD-10-CM codes do not have work Relative Value Units. wRVUs are assigned to CPT/HCPCS procedure codes.
  • Assistant Payable: Not Applicable. This attribute applies to surgical CPT codes.
  • Denial Risk: High if paired with incompatible procedure codes (e.g., cataract surgery without documented medical necessity linking the diabetes).
  • Query Opportunity: If documentation states “Diabetic Retinopathy” without specifying “Nonproliferative” vs “Proliferative” or “Moderate” vs “Severe,” a clinical documentation improvement (CDI) query is recommended.
  • E11.3312: Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema, left eye
  • E11.3313: Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema, bilateral
  • E11.339: Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy without macular edema
  • H36.01: Nonproliferative diabetic retinopathy (used only if diabetes type is not specified or for external cause indexing, generally E11 is preferred)
  • Z79.4: Long term (current) use of insulin

CMS ICD-10-CM Official Guidelines for Coding and Reporting FY 2025 CMS-HCC Risk Adjustment Model V28 Summary CMS MS-DRG Definitions Manual v42 NCHS ICD-10-CM Tabular List 2025

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