Phosphate (Phos)


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Phosphorus is a mineral that combines with other substances to form organic and inorganic phosphate compounds.

Phosphates are vital for energy production, muscle and nerve function, and bone growth. They also help maintain the body’s acid-base balance.

Phosphorus testing is typically performed as a follow-up to an abnormal calcium test or when symptoms of abnormal calcium such as fatigue, muscle weakness, cramping, or bone problems are present.

Phosphorus testing may be ordered along with other tests when symptoms suggest kidney and gastrointestinal disorders. When someone has diabetes or signs of an acid-base imbalance, a health practitioner may sometimes monitor phosphorus levels.

Requirements: Fasting required (Please consult your physician). To fast for blood work, do not eat anything for 8 to 12 hours before the test. It’s best to schedule fasting blood work for the morning, so that you don’t have to spend the whole day hungry. If fasting is not done before blood work, the results of the blood tests may be inaccurate.

CPT Code:  84100

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