ICD-10 Code for Hypothyroidism: What You Need to Know

The ICD-10 code for hypothyroidism is E03.9. This code is used to identify cases of hypothyroidism, which refers to an underactive thyroid gland. Hypothyroidism is a common endocrine disorder that affects millions of people worldwide.

Symptoms of Hypothyroidism

Hypothyroidism can cause a wide variety of symptoms. Some of the most common symptoms include fatigue, weight gain, cold intolerance, constipation, dry skin, hair loss, and depression. Other symptoms can include muscle weakness, joint pain, hoarseness, and menstrual irregularities.

Causes of Hypothyroidism

There are several different causes of hypothyroidism. Some of the most common causes include autoimmune disorders such as Hashimoto’s thyroiditis, radiation therapy, iodine deficiency, and certain medications. Additionally, hypothyroidism can be caused by congenital thyroid disease or a malfunction of the pituitary gland.

Diagnosis of Hypothyroidism

The diagnosis of hypothyroidism typically involves a physical exam, blood tests, and a review of medical history. The thyroid-stimulating hormone (TSH) test is typically used to diagnose hypothyroidism. This test measures the level of TSH in the blood, which is produced by the pituitary gland to stimulate the thyroid gland.

Treatment of Hypothyroidism

The most common treatment for hypothyroidism is the use of synthetic thyroid hormone medication. This medication is typically taken once a day, and the dosage may need to be adjusted over time based on blood tests. In some cases, hypothyroidism may be treated with radioactive iodine therapy, thyroid hormone replacement surgery, or other medications.

Using the ICD-10 Code for Hypothyroidism

The ICD-10 code for hypothyroidism (E03.9) is used by healthcare providers to report cases of the disorder to insurance companies and government agencies. It is important to accurately code cases of hypothyroidism in order to ensure proper reimbursement for medical services and to track the prevalence and incidence of the disorder.


Hypothyroidism is a common endocrine disorder that can cause a wide range of symptoms. The ICD-10 code for hypothyroidism (E03.9) is used to identify cases of the disorder and is an important tool for healthcare providers, insurance companies, and government agencies. With proper diagnosis and treatment, individuals with hypothyroidism can live healthy and productive lives.

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