ICD-10-CM Code E05.90

Thyrotoxicosis, unspecified without thyrotoxic crisis or storm

Version 2020 Billable Code

Valid for Submission

E05.90 is a billable code used to specify a medical diagnosis of thyrotoxicosis, unspecified without thyrotoxic crisis or storm. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code E05.90 might also be used to specify conditions or terms like autonomous thyroid function, circumscribed nodular and tuberous pretibial myxedema, diffuse pretibial myxedema, elephantiasic pretibial myxedema, familial gestational hyperthyroidism, familial hyperthyroidism, etc

Short Description:Thyrotoxicosis, unsp without thyrotoxic crisis or storm
Long Description:Thyrotoxicosis, unspecified without thyrotoxic crisis or storm

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code E05.90 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Autonomous thyroid function
  • Circumscribed nodular and tuberous pretibial myxedema
  • Diffuse pretibial myxedema
  • Elephantiasic pretibial myxedema
  • Familial gestational hyperthyroidism
  • Familial hyperthyroidism
  • Familial non-autoimmune autosomal dominant hyperthyroidism
  • Familial periodic paralysis
  • HCG-induced thyrotoxicosis
  • Hypercalcemia due to hyperthyroidism
  • Hypermelanosis due to endocrine disorder
  • Hypermelanosis due to hyperthyroidism
  • Hypermelanosis of the eyelids due to hyperthyroidism
  • Hyperthyroidism
  • Hyperthyroidism in childbirth
  • Hyperthyroidism in pregnancy
  • Hypertrichosis in hyperthyroidism
  • Hypertrophic cardiomyopathy associated with another disorder
  • Hypertrophic cardiomyopathy secondary to hyperthyroidism
  • Hypertrophic osteoarthropathy
  • Myasthenic syndrome due to another disorder
  • Myasthenic syndrome due to thyrotoxicosis
  • Pretibial myxedema
  • Secondary hyperthyroidism
  • Subclinical disease AND/OR syndrome
  • Subclinical hyperthyroidism
  • Thyroid acropachy
  • Thyroid disease in pregnancy
  • Thyroid disease in pregnancy
  • Thyroid-associated dermopathy
  • Thyroid-associated dermopathy
  • Thyrotoxic facies
  • Thyrotoxic heart disease
  • Thyrotoxic myopathy
  • Thyrotoxic periodic paralysis
  • Thyrotoxicosis
  • Thyrotoxicosis in pregnancy
  • Thyrotoxicosis with or without goiter
  • Thyrotoxicosis without goiter OR other cause

Convert E05.90 to ICD-9

  • 242.90 - Thyrotox NOS no crisis

Code Classification

  • Endocrine, nutritional and metabolic diseases (E00–E90)
    • Disorders of thyroid gland (E00-E07)
      • Thyrotoxicosis [hyperthyroidism] (E05)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

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 is too active, it makes more thyroid hormones than your body needs. This is called hyperthyroidism.

Hyperthyroidism is more common in women, people with other thyroid problems, and those over 60 years old. Graves' disease, an autoimmune disorder, is the most common cause. Other causes include thyroid nodules, thyroiditis, consuming too much iodine, and taking too much synthetic thyroid hormone.

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

  • Being nervous or irritable
  • Mood swings
  • Fatigue or muscle weakness
  • Heat intolerance
  • Trouble sleeping
  • Hand tremors
  • Rapid and irregular heartbeat
  • Frequent bowel movements or diarrhea
  • Weight loss
  • Goiter, which is an enlarged thyroid that may cause the neck to look swollen

To diagnose hyperthyroidism, your doctor will do a physical exam, look at your symptoms, and do thyroid tests. Treatment is with medicines, radioiodine therapy, or thyroid surgery. No single treatment works for everyone.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

[Learn More]