Prediabetes
In ICD-10-CM, chapter 4, "Endocrine, nutritional and metabolic diseases (E00-E89)," includes a separate subchapter (block), Diabetes mellitus E08-E13, with the categories:
E11. 10 - Type 2 diabetes mellitus with ketoacidosis without coma. ICD-10-CM.
Diabetic ketoacidosis (DKA) is a serious complication of diabetes that can be life-threatening. DKA is most common among people with type 1 diabetes. People with type 2 diabetes can also develop DKA. DKA develops when your body doesn't have enough insulin to allow blood sugar into your cells for use as energy.
DKA is less common in type 2 diabetics compared to type 1 diabetics because these patients are thought to be insulin resistant rather than insulin deficient.
E10. 11 - Type 1 diabetes mellitus with ketoacidosis with coma | ICD-10-CM.
Inducing ketosis is the aim of a ketogenic diet, or “keto” diet, which is a high-fat, very-low-carb diet that can help people lose weight. Ketoacidosis occurs when the body produces dangerously high levels of ketones, and it is often a complication of type 1 diabetes.
The most common causes are underlying infection, disruption of insulin treatment, and new onset of diabetes. (See Etiology.) DKA is defined clinically as an acute state of severe uncontrolled diabetes associated with ketoacidosis that requires emergency treatment with insulin and intravenous fluids.
Ketones build up when there is insufficient insulin to help fuel the body's cells. High levels of ketones are therefore more common in people with type 1 diabetes or people with advanced type 2 diabetes.
21 and E11. 22 have an excludes 1 notes therefore they can be coded together as long as a separate renal manifestation is present, I would just be careful when coding the actual renal condition as there are some renal codes that are excluded when using CKD codes.
E13, Other specified diabetes mellitus. Includes: Diabetes mellitus due to genetic defects of beta-cell function. Diabetes mellitus due to genetic defects in insulin action.
4–5. To report Type 1.5 diabetes mellitus, coders should assign ICD-10-CM codes from category E13. - (other specified diabetes mellitus). In this case, the provider specifically documented “combination Type 1 and 2 diabetes mellitus in poor control”; therefore, the coder should assign code E13.