Get a vitamin D blood test referral online. Bulk billed

What is a vitamin D blood test?

A vitamin D blood test checks the level of 25-hydroxyvitamin D in your blood, which is the main form your body uses to store vitamin D. Vitamin D plays a key role in bone health, by supporting the absorption of calcium and phosphate, and has broader effects on muscle strength and immune function.

Most vitamin D in Australia is produced in the skin after exposure to ultraviolet light from the sun, with smaller amounts coming from food and supplements. People who have limited sun exposure, wear covering clothing, have darker skin, or live in southern states during winter are more likely to have lower levels.

When a vitamin D test is ordered

Your GP may recommend a vitamin D test if you have symptoms or risk factors consistent with deficiency, such as persistent muscle aches, bone pain, or falls in older adults. Testing may also be indicated if you have osteoporosis, chronic kidney disease, malabsorption conditions, or take medications that affect vitamin D metabolism.

For otherwise healthy people without specific risk factors, Australian guidelines and Medicare rebate criteria generally do not support routine vitamin D screening. Your GP will discuss whether testing is clinically appropriate for you and whether you meet Medicare criteria for a rebated test. For more detail on symptoms and management, see our vitamin D deficiency page.

How to get a vitamin D referral online

Book a telehealth consultation with a NewDoc GP and discuss your symptoms, sun exposure, diet, and any relevant medical history. If your GP determines a vitamin D test is clinically appropriate, the pathology referral will be emailed to you after the consultation. You then attend any pathology collection centre in Australia for the blood draw.

Your GP may also consider other tests alongside vitamin D, such as a full blood count or iron studies, if your symptoms overlap with other nutritional issues. The consultation is bulk billed for eligible Medicare patients.

What to expect at the collection centre

Because fasting is not required, you can attend the pathology collection centre at a time that suits you. Most centres accept walk-ins or bookings and the blood draw is typically brief. Staying well hydrated beforehand can make the draw easier.

Results are sent to your NewDoc GP, usually within a few business days, and your GP will then contact you to discuss the findings. If other tests are ordered alongside vitamin D, all samples are usually taken in a single visit.

Understanding results

Your NewDoc GP will interpret your vitamin D level in the context of your symptoms, season of testing, and overall health. Australian guidelines generally classify levels below 50 nmol/L as deficient, with sub-categories for mild, moderate, and severe deficiency. Levels well above the recommended range are not usually better and may warrant review of supplement intake.

If deficiency is confirmed, your GP may suggest safe sun exposure advice, dietary changes, or vitamin D supplementation, subject to clinical appropriateness. A repeat blood test after a few months allows your GP to check your response and adjust the plan if needed.

When telehealth may not be suitable

Telehealth is well suited to arranging vitamin D pathology referrals and reviewing results. However, if you have significant new bone pain, a recent fall with injury, weakness that is affecting your mobility, or other concerning symptoms, your GP may recommend in-person assessment. Book a bulk billed telehealth consultation to discuss whether a vitamin D test or broader review is right for you.