2025 CPT code 84100
Effective Date: N/A Pathology and Laboratory Procedures - Chemistry Procedures Feed
Phosphorus inorganic (phosphate)
Modifiers may be applicable to indicate specific circumstances of the test, like if it is a repeat test (modifier 91).
Medical necessity is established by the patient's signs, symptoms, and clinical history that suggest a need to evaluate phosphate levels.Specific diagnoses like kidney disease, parathyroid disorders, or nutritional deficiencies can justify testing.
The laboratory analyst performs the test on a patient specimen, such as serum, to measure phosphate levels. They might prepare the specimen, add reagents, and use colorimetry to determine the concentration.This test is ordered by clinicians to diagnose various conditions related to abnormal phosphate levels.
In simple words: This blood test checks the amount of phosphate in your blood. Phosphate is a mineral important for healthy bones, kidneys, and energy levels. This test helps doctors see if your phosphate levels are too high or too low, which can be a sign of various health problems.
This test measures the level of inorganic phosphate (phosphorus not bound in organic compounds) in a patient's serum. It's used to assess phosphate levels, which play a vital role in various bodily functions, including bone health, kidney function, and energy metabolism.
Example 1: A patient with chronic kidney disease gets regular phosphate tests (84100) to monitor their levels and adjust treatment as needed., A patient experiencing muscle weakness, bone pain, and other symptoms has a phosphate test (84100) to check for potential imbalances as part of a diagnostic workup., A patient with a parathyroid disorder undergoes a phosphate test (84100) alongside calcium and vitamin D tests to assess overall mineral balance and guide treatment decisions.
Documentation should include the reason for testing, patient demographics, date and time of collection, specimen source, and any relevant clinical findings.
** This test is often performed with other tests like calcium, vitamin D, and parathyroid hormone (PTH) for comprehensive assessment.
- Specialties:Nephrology, Endocrinology, Internal Medicine, Family Medicine
- Place of Service:Independent Laboratory, Hospital, Outpatient Clinic, Physician Office