E039 - Underactive thyroid gland, type not specified

International Classification of Diseases

Last updated: 10/3/2025

What is a ICD-10 Code?

ICD-10 (International Classification of Diseases, 10th Revision) codes are used to classify and code all diagnoses, symptoms, and procedures recorded in association with hospital care. These codes provide a standardized way to track health conditions and their treatment outcomes.

Detailed Description

This code indicates that your thyroid gland is not producing enough thyroid hormone (hypothyroidism), but the specific type or cause has not been determined or specified. The thyroid is a butterfly-shaped gland in your neck that produces hormones controlling your body's metabolism, energy levels, and many other functions. When it's underactive, you may experience symptoms like fatigue, weight gain, cold sensitivity, dry skin, or depression. This is a general diagnostic code used when the doctor has confirmed hypothyroidism but hasn't specified the exact subtype.

Additional Information

This is a general code for hypothyroidism. Treatment typically involves daily thyroid hormone replacement medication and regular monitoring. Most patients with hypothyroidism can be effectively managed with proper treatment.

Category

Endocrine, nutritional and metabolic diseases

Medical Specialty

Endocrinology, Primary Care, Internal Medicine

Expected Costs

Your actual cost will depend on your insurance coverage, provider location, and specific circumstances.

What's Required Before This

  • Blood tests showing low thyroid hormone levels
  • Clinical evaluation by healthcare provider

What to Expect After

  • Regular monitoring of thyroid hormone levels
  • Possible thyroid hormone replacement therapy
  • Periodic blood tests to adjust medication dosing

Why Understanding This Code Matters

On Your Medical Bill

This code appears on your medical bills to identify the specific service, procedure, drug, or medical diagnosis you received. Understanding what it means helps you verify you're being charged correctly and know what to expect.

For Your Health

Knowing what this code represents helps you understand your treatment plan, ask better questions during appointments, and track your healthcare journey more effectively.

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