ICD-10-CM Diagnosis Code A18.81: Tuberculosis of thyroid gland

ICD-10-CM Diagnosis Code A18.81:Tuberculosis of thyroid gland

A18.81 is a billable and specific ICD-10-CM code. Accurate documentation of A18.81 facilitates proper diagnosis, effective management, and correct reimbursement.

This guideline will provide the use, official coding guidelines, and historical background of A18.81.

What is the ICD-10-CM Diagnosis Code for Tuberculosis of thyroid gland?

The ICD-10-CM diagnosis code for Tuberculosis of thyroid gland is A18.81.

Tuberculosis of the thyroid gland is a rare form of TB infection caused by Mycobacterium tuberculosis. It affects the thyroid, a gland in the neck that controls metabolism.

Symptoms may include neck swelling, pain, fever, weight loss, and sometimes difficulty swallowing. The infection spreads from other TB-infected areas, usually the lungs.

It is more likely in people with weakened immunity. Diagnosis includes thyroid ultrasound, biopsy, and TB tests.

Treatment involves anti-TB medicines and, in some cases, surgery if an abscess or lump forms. Early treatment ensures good recovery and prevents complications.

Proper documentation using A18.81 ensures patients receive appropriate care and enables accurate healthcare reimbursement.

History Background of ICD-10-CM Diagnosis Code A18.81

The ICD-9-CM system, first introduced in 1979, provided the initial framework for coding diseases and health-related conditions in the United States.

The ICD-9-CM diagnosis code for Tuberculosis of thyroid gland is 017.50(Tuberculosis of thyroid gland).This coding remained consistent from 1979 to 2015.

While the ICD-9-CM system offered a basic approach to disease classification, modern healthcare needs more detail and specificity.

To address this, the ICD-10-CM system was launched in 2015, introducing a more comprehensive and accurate coding structure.

The transition from ICD-9-CM to ICD-10-CM significantly improved the ability to document and analyze conditions such as Tuberculosis of thyroid gland.

The 2025 edition of ICD-10-CM A18.81 became effective on October 1, 2024.

YearICD-10-CM CodeDescription
2020A18.81 No Change
2021A18.81 No Change
2022A18.81 No Change
2023A18.81 No Change
2024A18.81 No Change
2025A18.81 No Change

Final Thoughts

Proper coding of A18.81 is essential for diagnosing and managing Tuberculosis of thyroid gland. A clear understanding of its History, and correct usage enhances medical documentation and ensures effective treatment, patient care, supports healthcare planning, and guarantees proper reimbursement for medical services.

About Author
content writer
Dr. Sehrish Bano, CPB & CPC

As a certified professional in both billing and coding, I specialize in streamlining healthcare revenue cycles and ensuring accurate claim submissions. With more than five years of experience serving the healthcare industry in the USA, I bring expertise in coding accuracy, compliance, and reimbursement optimization. My work focuses on reducing errors, improving efficiency, and supporting providers in delivering quality care without administrative hurdles. I am committed to helping healthcare organizations achieve financial stability and compliance through reliable billing and coding practices.

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