ICD-10 Diagnosis Code E02

Subclinical iodine-deficiency hypothyroidism

Diagnosis Code E02

ICD-10: E02
Short Description: Subclinical iodine-deficiency hypothyroidism
Long Description: Subclinical iodine-deficiency hypothyroidism
This is the 2017 version of the ICD-10-CM diagnosis code E02

Code Classification
  • Endocrine, nutritional and metabolic diseases
    • Disorders of thyroid gland (E00-E07)
      • Subclinical iodine-deficiency hypothyroidism (E02)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code E02 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Iodine hypothyroidism
  • Subclinical hypothyroidism
  • Subclinical iodine deficiency hypothyroidism

Information for Patients


Your thyroid is a butterfly-shaped gland in your neck, just above your collarbone. It is one of your endocrine glands, which make hormones. Thyroid hormones control the rate of many activities in your body. These include how fast you burn calories and how fast your heart beats. All of these activities are your body's metabolism. If your thyroid gland is not active enough, it does not make enough thyroid hormone to meet your body's needs. This condition is hypothyroidism.

Hypothyroidism is more common in women, people with other thyroid problems, and those over 60 years old. Hashimoto's disease, an autoimmune disorder, is the most common cause. Other causes include thyroid nodules, thyroiditis, congenital hypothyroidism, surgical removal of part or all of the thyroid, radiation treatment of the thyroid, and some medicines.

The symptoms can vary from person to person. They may include

  • Fatigue
  • Weight gain
  • A puffy face
  • Cold intolerance
  • Joint and muscle pain
  • Constipation
  • Dry skin
  • Dry, thinning hair
  • Decreased sweating
  • Heavy or irregular menstrual periods and fertility problems
  • Depression
  • Slowed heart rate

To diagnose hypothyroidism, your doctor will do a physical exam, look at your symptoms, and do thyroid tests. Treatment is with synthetic thyroid hormone, taken every day.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

  • Chronic thyroiditis (Hashimoto disease)
  • Factitious hyperthyroidism
  • Hashimoto's Disease - NIH (National Institute of Diabetes and Digestive and Kidney Diseases)
  • Hypothyroidism
  • Neonatal hypothyroidism
  • Silent thyroiditis
  • Subacute thyroiditis
  • T4 test
  • Thyroid Tests - NIH (National Institute of Diabetes and Digestive and Kidney Diseases)
  • TSH test

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