Non-Billable / Non-Specific Code
ICD-10-CM E05 is the diagnosis code for Thyrotoxicosis [hyperthyroidism]. This code falls under the section "Disorders of thyroid gland" within Chapter 4 — Endocrine, nutritional and metabolic diseases (E00-E89). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as E05. They are mutually exclusive:
Understanding where E05 sits in the ICD-10-CM classification helps ensure proper coding:
No, E05 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
E05 is the ICD-10-CM diagnosis code for "Thyrotoxicosis [hyperthyroidism]". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
E05 is located in Section E00-E07 — "Disorders of thyroid gland" within Chapter 4 of the ICD-10-CM Tabular List.
E05 has 7 sub-code(s) that provide more specific detail: E05.0, E05.1, E05.2, E05.3, E05.4 and more.
Use E05 when the patients documented diagnosis matches "Thyrotoxicosis [hyperthyroidism]" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Thyrotoxicosis [hyperthyroidism] is E05.
No, E05 is non-billable. Use a more specific sub-code for primary diagnosis billing.
E05 is in Chapter 4 of the ICD-10-CM Tabular List.
Type 1 Excludes for E05 include: chronic thyroiditis with transient thyrotoxicosis (E06.2); neonatal thyrotoxicosis (P72.1).
Yes, E05 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.