About the Vitamin D 25-Dihydroxy (Calcitriol) Testing in Bothell, WA
Below is a plain-language overview of the vitamin d 25-dihydroxy (calcitriol) test in Bothell, WA. The Vitamin D 25-Dihydroxy (Calcitriol) Test measures the active form of vitamin D in your blood. It is usually ordered when a clinician suspects a problem with calcium regulation, parathyroid function, or kidney activation of vitamin D, rather than to check for a simple vitamin D deficiency.
For the full, location-independent guide to this test, see Vitamin D 25-Dihydroxy (Calcitriol) Testing explained.
- Sample type
- blood
- Category
- Vitamin & Mineral
- Turnaround
- 1-3 business days
- Price
- $170
- Referral
- Not required
The Vitamin D 25-Dihydroxy (Calcitriol) Test measures the active form of vitamin D in your blood. It is usually ordered when a clinician suspects a problem with calcium regulation, parathyroid function, or kidney activation of vitamin D, rather than to check for a simple vitamin D deficiency.
About vitamin d 25-dihydroxy (calcitriol) testing in Bothell
Home to roughly 47,355 people, Bothell is a large town in Pacific. The region is uneven, with coastal metros, inland towns, and rural counties with very different access to testing.
Rather than calling around, compare tests here, then arrange a draw in the Bothell area when it suits you.
Your request stays private, and you choose where the specimen is collected. Always confirm current preparation steps, hours, and any fees directly with the collection lab.
What it measures
- 25-dihydroxyvitamin D (calcitriol) — The active hormone form of vitamin D that helps control calcium and phosphate levels.
- Calcium — A mineral that works closely with vitamin D and parathyroid hormone.
- Phosphorus — Another mineral affected by vitamin D activity.
- Parathyroid hormone (PTH) — A hormone that rises or falls in response to calcium and vitamin D levels.
Preparation
No fasting is usually required. Tell your clinician about any vitamin D, calcium, or steroid supplements you take, because timing and recent doses can affect the result.
Results and what they mean
Results are reported as a number with a reference range, and your clinician interprets them alongside calcium, phosphorus, and PTH. A single value is rarely enough to make a decision. This is general information only and is not medical advice; discuss your results with a qualified clinician.
How to order in Bothell
- Place a confidential order for the vitamin d 25-dihydroxy (calcitriol) testing online.
- Choose a collection site in or near Bothell, WA.
- Attend your appointment — most draws take only a few minutes.
- Review results securely, typically within 1–3 days.
Confirm preparation, hours, and any fees with the collection lab in Bothell before your visit.
Frequently asked questions
How is this different from a regular vitamin D test?
A regular vitamin D test measures 25-hydroxyvitamin D, the storage form. This test measures calcitriol, the active hormone form, which is used in more specific situations.
Do I need to stop my vitamin D supplement?
Ask your clinician. Do not stop or change any supplement or medication on your own before testing.
Can I eat before this test?
Yes, fasting is usually not required unless your clinician gives other instructions.
What if my result is outside the reference range?
Your clinician will consider your symptoms, other lab values, and medications before deciding what it means. Do not adjust treatment based on the number alone.