All ICD10 Codes
E13Not billable, use a more specific code below

Other specified diabetes mellitus

In Diabetes mellitus (E08-E13), chapter 4: Endocrine, Nutritional and Metabolic Diseases

86 billable codes under E13: 5 are an MCC, 1 is a CC; all map to HCC 37 (Diabetes with Chronic Complications), HCC 298 (Severe Diabetic Eye Disease, Retinal Vein Occlusion, and Vitreous Hemorrhage), HCC 36 (Diabetes with Severe Acute Complications) and 3 more HCCs.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.

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Instructional notes

Includes: conditions that are coded here

  • diabetes mellitus due to genetic defects of beta-cell function
  • diabetes mellitus due to genetic defects in insulin action
  • postpancreatectomy diabetes mellitus
  • postprocedural diabetes mellitus
  • secondary diabetes mellitus NEC

Excludes1: not coded here, use a different code

  • diabetes (mellitus) due to autoimmune process (E10.-)
  • diabetes (mellitus) due to immune mediated pancreatic islet beta-cell destruction (E10.-)
  • diabetes mellitus due to underlying condition (E08.-)
  • drug or chemical induced diabetes mellitus (E09.-)
  • gestational diabetes (O24.4-)
  • neonatal diabetes mellitus (P70.2)
  • type 1 diabetes mellitus (E10.-)

Use additional code: add a second code for this, listed after this one

  • 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)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

  • Section I.C.4.a Diabetes mellitus (page 39), covers E13

    Assign as many codes from E08 to E13 as needed for all complications; default to E11.- when type is undocumented. Add Z79 codes for long-term insulin, oral, or injectable drugs, but not Z79.4 for temporary insulin.

Other Chapter 4 topics:

Read Section I.C.4 (page 39)

All codes under E13

E13 can't be used on a claim. Pick a billable code below; grey headings group them.

E13 MS-DRGs

As the principal diagnosis, the billable codes under E13 group to MS-DRG 637, 638, or 639 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to E13

Notes on these codes point to E13.

  • D84.81 Code First: diabetes mellitus (E08-E13)
  • E08 Excludes1: postpancreatectomy diabetes mellitus (E13.-)
  • E08 Excludes1: postprocedural diabetes mellitus (E13.-)
  • E08 Excludes1: secondary diabetes mellitus NEC (E13.-)
  • E09 Excludes1: postpancreatectomy diabetes mellitus (E13.-)
  • E09 Excludes1: postprocedural diabetes mellitus (E13.-)
  • E09 Excludes1: secondary diabetes mellitus NEC (E13.-)
  • E10 Excludes1: postpancreatectomy diabetes mellitus (E13.-)
  • E10 Excludes1: postprocedural diabetes mellitus (E13.-)
  • E10 Excludes1: secondary diabetes mellitus NEC (E13.-)
  • E11 Excludes1: postpancreatectomy diabetes mellitus (E13.-)
  • E11 Excludes1: postprocedural diabetes mellitus (E13.-)
  • E11 Excludes1: secondary diabetes mellitus NEC (E13.-)
  • E74 Excludes1: diabetes mellitus (E08-E13)
  • E87.0 Excludes2: diabetes with hyperosmolarity (E08, E09, E11, E13 with final characters .00 or .01)
  • E87.2 Excludes1: diabetic acidosis - see categories E08-E10, E11, E13 with ketoacidosis
  • E89.1 Code First: if applicable, diabetes mellitus (postpancreatectomy) (postprocedural) (E13.-)
  • G54.5 Excludes1: neuralgic amyotrophy in diabetes mellitus (E08-E13 with .44)
  • G59 Excludes1: diabetic mononeuropathy (E08-E13 with .41)
  • G63 Excludes1: diabetes mellitus (E08-E13 with .42)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Diabetes

Diabetes, also known as diabetes mellitus, is a disease in which your blood glucose, or blood sugar, levels are too high. Glucose is your body's main source of energy. Your body can make glucose, but it also comes from the food you eat. Insulin is a hormone made by your pancreas. Insulin helps move glucose from your bloodstream into your cells, where it can be used for energy.

Read more about diabetes on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.