E11.9 Type 2 diabetes mellitus without complications

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• type 2 diabetes mellitus, without complications in remission (E11.A)

Applies from E11 Type 2 diabetes mellitus

Includes

• diabetes (mellitus) due to insulin secretory defect
• diabetes NOS
• insulin resistant diabetes (mellitus)

Excludes1 (never code together)

• diabetes mellitus due to underlying condition (E08.-)
• 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.-)

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)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 38 — Diabetes with Glycemic, Unspecified, or No Complications
• CMS-HCC V22: HCC 19 — Diabetes without Complication
• RxHCC V08: HCC 31 — Diabetes without Complication
• ESRD V24: HCC 19

MS-DRG index

Defines the logic of DRG(s) 637-639 in MDC 10.

Approximate ICD-9-CM (GEMs)

• 250.00 Diabetes mellitus without mention of complication, type II or unspecified type, not stated as uncontrolled (approximate)

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

• Questionable admission: Some diagnoses are not usually sufficient justification for admission to an acute care hospital when reported as principal diagnosis.

Code annotations containing back-references to E11.9

Back-references to E11.9

• Type 1 Excludes: E11.A Type 2 diabetes mellitus without complications in remission ("type 2 diabetes mellitus, without complications not in remission (E11.9)")

Back-references to E11

• Code First: D84.81 Immunodeficiency due to conditions classified elsewhere ("diabetes mellitus (E08-E13)")
• Type 1 Excludes: E08 Diabetes mellitus due to underlying condition ("type 2 diabetes mellitus (E11.-)")
• Type 1 Excludes: E09 Drug or chemical induced diabetes mellitus ("type 2 diabetes mellitus (E11.-)")
• Type 1 Excludes: E10 Type 1 diabetes mellitus ("type 2 diabetes mellitus (E11.-)")
• 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: O24.1 Pre-existing type 2 diabetes mellitus, in pregnancy, childbirth and the puerperium ("from category E11 to further identify any manifestations")
• Use Additional: O24.3 Unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium ("from category E11 to further identify any manifestation")
• 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 E11.9

• Diabetes, diabetic (mellitus) (sugar)
• Diabetes, diabetic (mellitus) (sugar) › type 2

Nearby codes

• E11.641 Type 2 diabetes mellitus with hypoglycemia with coma
• E11.649 Type 2 diabetes mellitus with hypoglycemia without coma
• E11.65 Type 2 diabetes mellitus with hyperglycemia
• E11.69 Type 2 diabetes mellitus with other specified complication
• E11.8 Type 2 diabetes mellitus with unspecified complications
• E11.9 Type 2 diabetes mellitus without complications (this code)
• E11.A Type 2 diabetes mellitus without complications in remission