Above the range
Common causes of a high Alkaline Phosphatase (ALP)
- Biliary obstruction (cholestasis)
- Bone growth or disease (Paget, mets)
- Pregnancy
- Liver disease
Looking for the other direction? See what causes a low Alkaline Phosphatase (ALP).
All tests · Liver Function (LFTs) · Alkaline Phosphatase (ALP)
Above the range
What causes a high Alkaline Phosphatase (ALP)?
Normal range 44-147 U/L (0.73-2.45 µkat/L SI). Specimen: Serum. See the full Alkaline Phosphatase (ALP) reference page for critical values and nursing considerations.
What is the normal range for Alkaline Phosphatase (ALP)?
The standard teaching reference range for Alkaline Phosphatase (ALP) is 44-147 U/L in conventional units, or 0.73-2.45 µkat/L in SI units. This value is measured in serum.
| Specimen | Serum |
|---|---|
| Conventional range | 44-147 U/L |
| SI range | 0.73-2.45 µkat/L |
| Panel | Liver Function (LFTs) |
Full details, including nursing considerations, on the Alkaline Phosphatase (ALP) normal range page. Reference ranges vary by laboratory, method, age, sex, and population - always use the range printed on the actual result.
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