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CPT Code 84443 | Thyroid Stimulating Hormone (TSH)

CPT 84443 can be used to report a laboratory test that measures the level of thyroid-stimulating hormone (TSH) in a patient’s blood to diagnose and monitor thyroid disorders like hypothyroidism and hyperthyroidism.

What Is CPT Code 84443?

CPT code 84443 describes a laboratory test that measures the level of thyroid-stimulating hormone (TSH) in a patient’s blood.

TSH is a hormone produced by the pituitary gland that helps regulate thyroid function.

CPT 84443 is used to diagnose and monitor thyroid disorders such as hypothyroidism and hyperthyroidism.

The test typically involves collecting a small sample of blood, which is then analyzed in a lab using various methods such as radioimmunoassay (RIA) or enzyme immunoassay with monoclonal antibodies.

Description

The CPT book describes CPT code 84443 as: “Thyroid stimulating hormone (TSH).”

Procedure

A lab analyst performs a test to measure the amount of thyroid-stimulating hormone (TSH) produced in the pituitary gland that helps regulate thyroid function.

CPT 84443 can help diagnose and monitor thyroid disorders such as hypothyroidism and hyperthyroidism.

The typical specimen for this test is the patient’s blood, collected via a routine vein puncture. The process is usually simple and painless and only requires a small amount of blood. Once the blood sample is collected, it is transported to the lab for analysis.

The lab analyst then performs the technical steps to mix the specimen, typically patient blood, with specific substances to measure thyroid-stimulating hormone (TSH).

The collected blood specimen is then examined using various procedures, such as radioimmunoassay (RIA), enzyme immunoassay with monoclonal antibodies, or other methods.

These highly accurate and sensitive methods allow the lab analyst to measure the exact amount of TSH in the patient’s blood.

The lab analyst then interprets the test results and reports to the physician, who will use the results to make a diagnosis or adjust the patient’s treatment plan as needed.

It is important to note that TSH levels can be affected by various factors, such as stress, illness, or certain medications.

The 84443 test may need repeated several times to ensure accurate results.

How To Use CPT 84443

Clinicians may order CPT code 84443 to evaluate patients for an imbalance in metabolism caused by elevated or decreased levels of TSH. High TSH levels indicate hypothyroidism, or an underactive thyroid, while low TSH levels indicate hyperthyroidism or an overactive thyroid.

Some insurance providers may require a separate code to collect the specimen (CPT code 36415).

The average range of TSH in the blood is 0.4 to 4.0 milli-IU/L. The clinician can use the 84443 test results to diagnose or adjust the patient’s treatment plan.

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