Summary & Overview
CPT 84443: Thyroid Stimulating Hormone Laboratory Test
CPT code 84443 represents the laboratory analysis of thyroid stimulating hormone (TSH), a critical test for assessing thyroid function in patients. This procedure is widely utilized across the United States to diagnose and monitor thyroid disorders, including hypothyroidism and hyperthyroidism. The test is performed in clinical laboratories, most commonly in outpatient settings, and is a standard component of endocrine and primary care evaluations.
Major national payers such as Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare provide coverage for TSH testing, reflecting its importance in routine and specialized medical care. Readers will gain insight into the clinical context of TSH testing, relevant billing and coding practices, and associated policy updates. The publication also highlights common modifiers used in laboratory billing, associated provider taxonomies, and ICD-10 diagnoses frequently linked to TSH testing, such as various types of heart failure and diabetes mellitus.
This summary offers a comprehensive overview of CPT code 84443, including its clinical significance, payer coverage, and related coding considerations. Healthcare professionals, billing specialists, and policy analysts will find valuable information on benchmarks, coding updates, and the broader context of laboratory testing for thyroid function.
CPT Code Overview
CPT code 84443 is used to report the laboratory measurement of thyroid stimulating hormone (TSH) levels. This test is a key component in evaluating thyroid function and is commonly ordered to assess conditions such as hypothyroidism and hyperthyroidism. The service falls under Pathology and Laboratory Procedures – Chemistry Procedures and is typically performed in a laboratory setting, most often in an outpatient lab environment (Place of Service 81). Accurate TSH measurement is essential for guiding clinical decisions related to thyroid health.
Clinical & Coding Specifications
Clinical Context
A patient with a history of heart failure or type 2 diabetes mellitus presents to their primary care provider or cardiologist for routine follow-up. The provider orders laboratory tests to assess thyroid function, as thyroid disorders can impact cardiovascular health and metabolic control. The laboratory collects a blood sample in an outpatient setting (Place of Service 81) and performs a thyroid stimulating hormone (TSH) assay using CPT code 84443. The results are reviewed by the provider to guide further management of the patient's condition.
Coding Specifications
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Modifier
91: Used when the TSH test (84443) is repeated on the same patient to obtain multiple results, such as monitoring changes over time. -
Modifier
59: Applied when the TSH test is performed as a distinct procedural service, separate from other laboratory tests, to indicate that it is not part of a bundled service.
| Modifier Code | Description |
|---|---|
91 |