2020 ICD-10-CM Diagnosis Code E05.9

Thyrotoxicosis, unspecified

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • E05.9 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM E05.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of E05.9 - other international versions of ICD-10 E05.9 may differ.
Applicable To
  • Hyperthyroidism NOS
The following code(s) above E05.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to E05.9:
  • E00-E89
    2020 ICD-10-CM Range E00-E89

    Endocrine, nutritional and metabolic diseases

    Note
    • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.
    Type 1 Excludes
    • transitory endocrine and metabolic disorders specific to newborn (P70-P74)
    Endocrine, nutritional and metabolic diseases
  • E05
    ICD-10-CM Diagnosis Code E05

    Thyrotoxicosis [hyperthyroidism]

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • chronic thyroiditis with transient thyrotoxicosis (E06.2)
    • neonatal thyrotoxicosis (P72.1)
    Thyrotoxicosis [hyperthyroidism]
Clinical Information
  • A disorder characterized by excessive levels of thyroid hormone in the body. Common causes include an overactive thyroid gland or thyroid hormone overdose.
  • A hypermetabolic syndrome caused by excess thyroid hormones which may come from endogenous or exogenous sources. The endogenous source of hormone may be thyroid hyperplasia; thyroid neoplasms; or hormone-producing extrathyroidal tissue. Thyrotoxicosis is characterized by nervousness; tachycardia; fatigue; weight loss; heat intolerance; and excessive sweating.
  • A hypermetabolic syndrome caused by the elevation of thyroid hormone levels in the serum. Signs and symptoms include tachycardia, palpitations, tremor, weight loss, warm weather intolerance, and moist skin. Causes include graves disease, toxic nodular goiter, toxic thyroid nodule, and lymphocytic thyroiditis.
  • Excessive functional activity of the thyroid gland.
  • Hypersecretion of thyroid hormones from the thyroid gland. Elevated levels of thyroid hormones increase basal metabolic rate.
  • Overactivity of the thyroid gland resulting in overproduction of thyroid hormone and increased metabolic rate. Causes include diffuse hyperplasia of the thyroid gland (graves' disease), single nodule in the thyroid gland, and thyroiditis. The symptoms are related to the increased metabolic rate and include weight loss, fatigue, heat intolerance, excessive sweating, diarrhea, tachycardia, insomnia, muscle weakness, and tremor.
  • Too much thyroid hormone. Symptoms include weight loss, chest pain, cramps, diarrhea, and nervousness.
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to E05.9:
  • Code First: I43
    ICD-10-CM Diagnosis Code I43

    Cardiomyopathy in diseases classified elsewhere

      2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
    Code First
    Type 1 Excludes
ICD-10-CM Codes Adjacent To E05.9
E05.21 …… with thyrotoxic crisis or storm
E05.3 Thyrotoxicosis from ectopic thyroid tissue
E05.30 …… without thyrotoxic crisis or storm
E05.31 …… with thyrotoxic crisis or storm
E05.4 Thyrotoxicosis factitia
E05.40 …… without thyrotoxic crisis or storm
E05.41 …… with thyrotoxic crisis or storm
E05.8 Other thyrotoxicosis
E05.80 …… without thyrotoxic crisis or storm
E05.81 …… with thyrotoxic crisis or storm
E05.9 Thyrotoxicosis, unspecified
E05.90 …… without thyrotoxic crisis or storm
E05.91 …… with thyrotoxic crisis or storm
E06 Thyroiditis
E06.0 Acute thyroiditis
E06.1 Subacute thyroiditis
E06.2 Chronic thyroiditis with transient thyrotoxicosis
E06.3 Autoimmune thyroiditis
E06.4 Drug-induced thyroiditis
E06.5 Other chronic thyroiditis
E06.9 Thyroiditis, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.