ICD-10-CM E03.9 is the diagnosis code for Hypothyroidism, unspecified. This code falls under the section "Disorders of thyroid gland" within Chapter 4 — Endocrine, nutritional and metabolic diseases (E00-E89). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where E03.9 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, E03.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
E03.9 is the ICD-10-CM diagnosis code for "Hypothyroidism, unspecified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of E03.9 is E03 ("Other hypothyroidism"). E03.9 provides a more specific classification within this category.
E03.9 is located in Section E00-E07 — "Disorders of thyroid gland" within Chapter 4 of the ICD-10-CM Tabular List.
Use E03.9 when the patients documented diagnosis matches "Hypothyroidism, unspecified" 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 Hypothyroidism, unspecified is E03.9.
Yes, E03.9 can be used as a primary diagnosis code since it is billable and specific.
E03.9 is in Chapter 4 of the ICD-10-CM Tabular List.
Yes, E03.9 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.