What does PTH mean?
Parathyroid hormone controls calcium and phosphate through bone, kidneys and vitamin D. It is read with those companion results to understand mineral balance.
What it shows and why it matters
PTH, or Parathyroid Hormone, controls Calcium and Phosphate by acting on bone, kidneys and Vitamin D metabolism. A high or low result can help explain an abnormal Calcium level and can show how the parathyroid glands are responding to kidney disease or Vitamin D status. It must be read with Calcium, Phosphate, kidney function and Vitamin D from the same clinical picture.
How PTH appears on your report
Look for Parathyroid Hormone (PTH). The result is normally shown in pmol/L, next to the reference interval used by the laboratory that ran the test.
Note the collection date before you compare it with anything, along with the context that matters for this marker: calcium, Phosphate, Vitamin D, Magnesium, kidney function, collection timing and medicines can affect it. Companion results from the same clinical picture are essential.
PTH range in Australia
Vector shows an assay-dependent contextual tracking band of 1.6–7.2 pmol/L for PTH. It is not a universal optimal target or clinical threshold; use the interval printed by the laboratory that performed the test.
This contextual band mirrors the app and the Vector Profile; the performing laboratory’s interval remains authoritative.
Interpretation limits
PTH is a response hormone, so the same value means different things at different Calcium, Phosphate, Vitamin D and kidney-function levels.
The interval printed beside your result remains the authority for that specimen. Reference intervals, diagnostic thresholds, treatment targets and Vector's tracking bands answer different questions and should not be substituted for one another.
What to read alongside PTH
A single marker rarely explains itself. These results are commonly interpreted together with PTH, and Vector keeps them within reach of each other as your record grows.
When to discuss PTH with a clinician
Discuss a new or persistent abnormal result, reduced urine output, swelling, vomiting, confusion, heart-rhythm symptoms, kidney disease risk or medicines that affect kidney and electrolyte balance.
Tracking PTH over time
One PTH result is a single point. Import the report into Vector, check the extracted value, unit and collection date, and it becomes the start of a series instead — with each later report adding a dated point you can actually compare against.
Further reading
PTH is read the same way every other result on the report is. These two guides cover that method rather than this marker:
- How to read an Australian pathology report — A practical guide to dates, units, reference intervals and the context that belongs beside an Australian pathology result.
- Pathology report reference ranges: what they mean — Understand the laboratory interval, Australian guidance and the product context Vector adds to a result over time.
Common questions
What is a normal PTH range in Australia?
Australia has no nationally harmonised reference interval for PTH, so the range printed on your report varies with the laboratory and assay. Vector shows 1.6–7.2 pmol/L as an assay-dependent contextual tracking band, not a universal optimal target or clinical threshold. Always use the interval beside your own result.
How should the PTH tracking band be interpreted?
Vector shows 1.6–7.2 pmol/L as an assay-dependent contextual band for PTH. It is not a universal optimal target or clinical threshold. Interpret the result with the performing laboratory's interval, treatment and symptoms.
What unit is PTH reported in on Australian pathology reports?
PTH is usually reported in pmol/L on Australian pathology reports. The performing laboratory prints a reference interval in the same unit beside the result, and that interval is the one that governs your individual result.
What can change your PTH result?
Calcium, Phosphate, Vitamin D, Magnesium, kidney function, collection timing and medicines can affect it. Companion results from the same clinical picture are essential.
Sources
- RCPA Manual: Parathyroid disordersAustralian guidance on interpreting PTH with calcium, phosphate, Vitamin D and kidney function.
- Kidney Health Australia: eGFRAustralian consumer context for kidney filtration and follow-up.
Published 29 August 2026 · Updated 29 August 2026 · Author Vector