E08.3291 Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema, right eye

Billable ICD-10-CM code, FY2026.

Built from E08.329 with 7th character 1 (right eye).

Applies from E08 Diabetes mellitus due to underlying condition

Excludes1 (never code together)

• drug or chemical induced diabetes mellitus (E09.-)
• gestational diabetes (O24.4-)
• neonatal diabetes mellitus (P70.2)
• postpancreatectomy diabetes mellitus (E13.-)
• postprocedural diabetes mellitus (E13.-)
• secondary diabetes mellitus NEC (E13.-)
• type 1 diabetes mellitus (E10.-)
• type 2 diabetes mellitus (E11.-)

Code first

• the underlying condition, such as:
• congenital rubella (P35.0)
• Cushing's syndrome (E24.-)
• cystic fibrosis (E84.-)
• malignant neoplasm (C00-C96)
• malnutrition (E40-E46)
• pancreatitis and other diseases of the pancreas (K85-K86.-)

Use additional code

• code to identify control using:
• injectable non-insulin antidiabetic drugs (Z79.85)
• insulin (Z79.4)
• oral antidiabetic drugs (Z79.84)
• oral hypoglycemic drugs (Z79.84)

Applies from E08.32 Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy

Applicable to

• Diabetes mellitus due to underlying condition with nonproliferative diabetic retinopathy NOS

7th character note

• One of the following 7th characters is to be assigned to codes in subcategory E08.32 to designate laterality of the disease:

7th character required

• 1 — right eye
• 2 — left eye
• 3 — bilateral
• 9 — unspecified eye

Risk adjustment (HCC)

• CMS-HCC V28: HCC 37 — Diabetes with Chronic Complications
• CMS-HCC V22: HCC 18 — Diabetes with Chronic Complications
• RxHCC V08: HCC 30 — Diabetes with Complications
• ESRD V24: HCC 18

Medicare Code Edits (MCE v43.1 (April 2026))

• Manifestation codes as principal diagnosis: Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and are not allowed as principal diagnosis.

Code annotations containing back-references to E08.3291

Back-references to E08.3

• Type 1 Excludes: H36 Retinal disorders in diseases classified elsewhere ("diabetic retinopathy (E08.3-, E09.3-, E10.3-, E11.3-, E13.3-)")

Back-references to E08

• Code First: D84.81 Immunodeficiency due to conditions classified elsewhere ("diabetes mellitus (E08-E13)")
• Type 1 Excludes: E09 Drug or chemical induced diabetes mellitus ("diabetes mellitus due to underlying condition (E08.-)")
• Type 1 Excludes: E10 Type 1 diabetes mellitus ("diabetes mellitus due to underlying condition (E08.-)")
• Type 1 Excludes: E11 Type 2 diabetes mellitus ("diabetes mellitus due to underlying condition (E08.-)")
• Type 1 Excludes: E13 Other specified diabetes mellitus ("diabetes mellitus due to underlying condition (E08.-)")
• Type 1 Excludes: E74 Other disorders of carbohydrate metabolism ("diabetes mellitus (E08-E13)")
• Type 2 Excludes: E87.0 Hyperosmolality and hypernatremia ("diabetes with hyperosmolarity (E08, E09, E11, E13 with final characters .00 or .01)")
• Type 1 Excludes: E87.2 Acidosis ("diabetic acidosis - see categories E08-E10, E11, E13 with ketoacidosis")
• Type 1 Excludes: G54.5 Neuralgic amyotrophy ("neuralgic amyotrophy in diabetes mellitus (E08-E13 with .44)")
• Type 1 Excludes: G59 Mononeuropathy in diseases classified elsewhere ("diabetic mononeuropathy (E08-E13 with .41)")
• Type 1 Excludes: G63 Polyneuropathy in diseases classified elsewhere ("diabetes mellitus (E08-E13 with .42)")
• Type 1 Excludes: G99.0 Autonomic neuropathy in diseases classified elsewhere ("diabetic autonomic neuropathy (E08-E13 with .43)")
• Type 1 Excludes: H20.0 Acute and subacute iridocyclitis ("iridocyclitis, iritis, uveitis (due to) (in) diabetes mellitus (E08-E13 with .39)")
• Type 1 Excludes: I73.8 Other specified peripheral vascular diseases ("diabetic (peripheral) angiopathy (E08-E13 with .51-.52)")
• Type 1 Excludes: I79.8 Other disorders of arteries, arterioles and capillaries in diseases classified elsewhere ("diabetic (peripheral) angiopathy (E08-E13 with .51-.52)")
• Type 2 Excludes: I96 Gangrene, not elsewhere classified ("gangrene in diabetes mellitus (E08-E13 with .52)")
• Type 1 Excludes: L92.1 Necrobiosis lipoidica, not elsewhere classified ("necrobiosis lipoidica associated with diabetes mellitus (E08-E13 with .620)")
• Type 1 Excludes: L99 Other disorders of skin and subcutaneous tissue in diseases classified elsewhere ("skin disorders in diabetes (E08-E13 with .62-)")
• Type 1 Excludes: M14 Arthropathies in other diseases classified elsewhere ("diabetes mellitus (E08-E13 with .61-)")
• Type 1 Excludes: M14.6 Charcôt's joint ("Charcôt's joint in diabetes mellitus (E08-E13 with .610)")
• Type 1 Excludes: M90 Osteopathies in diseases classified elsewhere ("diabetes mellitus (E08-E13 with .69-)")
• Type 1 Excludes: N08 Glomerular disorders in diseases classified elsewhere ("diabetes (E08-E13 with .21)")
• Type 1 Excludes: N16 Renal tubulo-interstitial disorders in diseases classified elsewhere ("renal tubular degeneration in diabetes (E08-E13 with .29)")
• Type 1 Excludes: N76.82 Fournier disease of vagina and vulva ("gangrene in diabetes mellitus (E08-E13 with .52)")
• Code Also: N76.82 Fournier disease of vagina and vulva (", if applicable, diabetes mellitus (E08-E13 with .9)")
• Use Additional: O24.8 Other pre-existing diabetes mellitus in pregnancy, childbirth, and the puerperium ("from categories E08, E09 and E13 to further identify any manifestation")
• Use Additional: O24.9 Unspecified diabetes mellitus in pregnancy, childbirth and the puerperium ("from categories E08, E09 and E13 to further identify any manifestation")
• Type 2 Excludes: R11.15 Cyclical vomiting syndrome unrelated to migraine ("diabetes mellitus due to underlying condition (E08.-)")
• Type 1 Excludes: R40 Somnolence, stupor and coma ("somnolence, stupor and coma in diabetes (E08-E13)")
• Type 1 Excludes: R73 Elevated blood glucose level ("diabetes mellitus (E08-E13)")
• Type 1 Excludes: R73.0 Abnormal glucose ("diabetes mellitus (E08-E13)")

Diagnosis Index entries for E08.3291

• Diabetes, diabetic (mellitus) (sugar) › due to underlying condition › with › retinopathy › nonproliferative
• Diabetes, diabetic (mellitus) (sugar) › due to underlying condition › with › retinopathy › nonproliferative › mild

Nearby codes

• E08.3211 Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy with macular edema, right eye
• E08.3212 Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy with macular edema, left eye
• E08.3213 Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy with macular edema, bilateral
• E08.3219 Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy with macular edema, unspecified eye
• E08.329 Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema
• E08.3291 Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema, right eye (this code)
• E08.3292 Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema, left eye
• E08.3293 Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema, bilateral
• E08.3299 Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema, unspecified eye
• E08.33 Diabetes mellitus due to underlying condition with moderate nonproliferative diabetic retinopathy
• E08.331 Diabetes mellitus due to underlying condition with moderate nonproliferative diabetic retinopathy with macular edema