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⚡ Chapter 4 · E00-E89

Hormones & Metabolism Diagnosis Codes

Endocrine and metabolic codes cover conditions involving your hormones, metabolism, and nutrition. This includes diabetes (the most commonly coded conditions in this chapter), thyroid disorders, obesity, and vitamin deficiencies. These conditions often require ongoing management and multiple specialist visits.

About This Chapter

Chapter 4 of the ICD-10-CM classification covers endocrine, nutritional and metabolic diseases, spanning codes E00-E89. These codes are used by healthcare providers to document diagnoses in your electronic health record (EHR), on insurance claims, and on medical bills.

Why this matters: If you see a code starting with E on your medical bill or health records, it likely falls in this chapter. Understanding what chapter your code belongs to can help you make sense of your diagnosis and ask better questions at your next appointment.

Diagnosis Codes in This Chapter

Browse the 67 diagnosis codes we currently cover in this chapter. Select any code to read a plain-English explanation.

E03.9Hypothyroidism, Unspecified E05.00Thyrotoxicosis with Diffuse Goiter (Graves... E05.90Thyrotoxicosis (Hyperthyroidism)... E08.9Diabetes Due to Underlying Condition... E09.9Drug-Induced Diabetes E10.10Type 1 Diabetes with Ketoacidosis... E10.65Type 1 Diabetes with Hyperglycemia... E10.9Type 1 Diabetes Without Complications... E10Type 1 Diabetes E11.21Type 2 Diabetes with Diabetic Nephropathy... E11.22Type 2 Diabetes with Chronic Kidney Diseas... E11.311Type 2 Diabetes with Background Diabetic ... E11.319Type 2 Diabetes with Diabetic Retinopathy... E11.36Type 2 Diabetes with Diabetic Cataract... E11.40Type 2 Diabetes with Diabetic Neuropathy... E11.41Type 2 Diabetes with Diabetic Mononeuropat... E11.42Type 2 Diabetes with Diabetic Polyneuropat... E11.43Type 2 Diabetes with Diabetic Autonomic Ne... E11.44Type 2 Diabetes with Diabetic Amyotrophy... E11.49Type 2 Diabetes with Other Diabetic Neurol... E11.51Type 2 Diabetes with Diabetic Peripheral A... E11.52Type 2 Diabetes with Diabetic Peripheral A... E11.59Type 2 Diabetes with Other Circulatory Com... E11.65Type 2 Diabetes with Hyperglycemia... E11.9Type 2 Diabetes Without Complications... E11Type 2 Diabetes E13.9Other Specified Diabetes E16.2Hypoglycemia E21.0Primary Hyperparathyroidism E21.3Hyperparathyroidism, Unspecified E22.0Acromegaly and Pituitary Gigantism... E22.1Hyperprolactinemia E23.0Hypopituitarism E24.9Cushing Syndrome E27.1Primary Adrenocortical Insufficiency (Addis... E27.40Adrenocortical Insufficiency, Unspecified... E28.2Polycystic Ovarian Syndrome (PCOS)... E29.1Testicular Hypofunction E34.9Endocrine Disorder, Unspecified E44.0Moderate Protein-Calorie Malnutrition... E46Unspecified Protein-Calorie Malnutrition... E53.8Deficiency of Other B Group Vitamins... E55.9Vitamin D Deficiency E56.9Vitamin Deficiency, Unspecified E61.1Iron Deficiency E63.9Nutritional Deficiency, Unspecified... E66.01Morbid Obesity Due to Excess Calories... E66.09Other Obesity Due to Excess Calories... E66Overweight and Obesity E70.0Classical Phenylketonuria E72.9Disorder of Amino-Acid Metabolism... E74.9Disorder of Carbohydrate Metabolism... E75.29Other Sphingolipidosis E78.00Pure Hypercholesterolemia E78.1Pure Hyperglyceridemia E78.2Mixed Hyperlipidemia E78.5Hyperlipidemia (High Cholesterol)... E80.4Gilbert Syndrome E83.39Other Disorders of Phosphorus Metabolism... E83.52Hypercalcemia E84.0Cystic Fibrosis with Pulmonary Manifestatio... E84.9Cystic Fibrosis, Unspecified E86.0Dehydration E87.0Hyperosmolality and Hypernatremia... E87.1Hypo-osmolality and Hyponatremia E87.6Hypokalemia (Low Potassium) E88.09Other Disorders of Plasma-Protein Metaboli...