Hyperthyroidism ICD-10-CM Codes

Stay updated with the latest and most accurate Hyperthyroidism ICD-10-CM codes. Enhance your coding skills and improve clinical documentation.

By Patricia Buenaventura on Aug 8, 2025.

Fact Checked by Ericka Pingol.

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What ICD-10 codes are used for hperthyroidism?

Hyperthyroidism ICD codes are instrumental for precise medical billing and clinical documentation. Here are some of the most frequently used:

E05.00: Thyrotoxicosis with diffuse goiter without thyrotoxic crisis or storm

This code is typically used when a patient presents with an overactive thyroid coupled with a diffuse goiter but without a thyrotoxic crisis.

E05.01: Thyrotoxicosis with diffuse goiter with thyrotoxic crisis or storm

This code represents cases where a patient has an overactive thyroid with diffuse goiter and is experiencing a thyrotoxic crisis.

E05.20: Thyrotoxicosis with toxic multinodular goiter without thyrotoxic crisis or storm

Use this code for patients diagnosed with an overactive thyroid and toxic multinodular goiter but not experiencing a thyrotoxic crisis.

E05.21: Thyrotoxicosis with toxic multinodular goiter with thyrotoxic crisis or storm

This code is used when a patient has an overactive thyroid with a toxic multinodular goiter and is going through a thyrotoxic crisis.

E05.30: Thyrotoxicosis from ectopic thyroid tissue without thyrotoxic crisis or storm

This code is assigned when the patient's hyperthyroidism results from ectopic thyroid tissue and is not experiencing a thyrotoxic crisis.

E05.31: Thyrotoxicosis from ectopic thyroid tissue with thyrotoxic crisis or storm

This code is used for cases where hyperthyroidism results from ectopic thyroid tissue, and the patient is experiencing a thyrotoxic crisis.

Which Hyperthyroidism ICD codes are billable?

Here is a brief review of the hyperthyroidism ICD codes and their billability:

E05.00: Yes, billable. It indicates a diagnosis for reimbursement purposes.
E05.01: Yes, billable. It signifies a valid diagnosis as recognized by the payer.
E05.20: Yes, billable. This code can be used for insurance claim purposes.
E05.21: Yes, billable. It provides a means for accurate medical billing.
E05.30: Yes, billable. This code is essential for healthcare reimbursement.
E05.31: Yes, billable. It is an accepted diagnosis for insurance claims.

Clinical information

Hyperthyroidism is when the thyroid gland produces excessive amounts of thyroid hormones, leading to increased heart rate, weight loss, sweating, and anxiety. Here are critical points on hyperthyroidism:

Hyperthyroidism is more common in women than men.
It can occur at any age but is more frequent in people over 60.
Causes of hyperthyroidism include an inflammation of the thyroid, acute/chronic thyroiditis, excess intake of a thyroid hormone, or nutritional and metabolic diseases like Graves' disease.
Symptoms may include irritability, muscle weakness, sleeping problems, a fast heartbeat, heat intolerance, diarrhea, and weight loss.
In severe cases, patients might experience a thyrotoxic crisis or storm—a life-threatening condition that requires immediate medical intervention.
Treatments for hyperthyroidism can include medications to slow the production of thyroid hormones, radioactive iodine to destroy the thyroid gland, or surgical removal of the gland.

Synonyms include

Thyroid Hyperfunction
Overactive Thyroid
Thyrotoxicosis
Thyroiditis, Subacute
Graves' Disease

Commonly asked questions

Hyperthyroidism can be triggered by various factors, including Graves' disease, inflammation of the thyroid, a multinodular goiter, or a thyroid tumor.

Some forms of hyperthyroidism may resolve without treatment, such as postpartum or subacute thyroiditis. However, most states require treatment to manage symptoms and prevent complications.

Foods high in iodine, like iodized salt, fish, seafood, and dairy products, should be avoided as they can worsen hyperthyroid symptoms.

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