Prescribed Vitamin D Analog Concentration (Serum/Plasma)
This test measures the level of a synthetic vitamin D analog prescribed to you, typically used to treat conditions like rickets, osteoporosis, or vitamin D deficiency.
["Your doctor may check this level to ensure your prescribed vitamin D analog is working properly and at the right amount in your body."]
Key facts at a glance
- LOINC
- 72033-4
- Short code
- NONORALVITAMINDANALOGPRESCRIBED
- Synonyms
- —
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 30
- Ref high
- 100
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- esrd
- CPT
- 86038
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Doctors order this test to monitor how well your prescribed vitamin D analog is managing your vitamin D levels. It helps prevent side effects like too much calcium in your blood or other health issues caused by improper dosing.
What to Expect Before the Test
No special preparation is needed for this test. You may have a blood sample drawn from a vein in your arm, or sometimes a urine sample may be collected if specified. Let your healthcare provider know about any medications or supplements you take, as they may affect results.
What the Test Results Mean
Results will show the concentration of your prescribed vitamin D analog in your blood or urine. Your doctor will compare these results to your medical history and symptoms to determine if your treatment is effective.
Possible Side Effects or Risks
While rare, high doses of vitamin D analogs can sometimes cause nausea, vomiting, or an abnormal calcium level in your blood. Always follow your doctor’s instructions for dosage and timing.
Reference range
NCBI: Vitamin D 30-100 ng/mL (sufficient)N/A
Fasting for 8-12 hours preferred for some tests. Inform about supplements you are taking.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Vitamin D analogs are synthetic forms of vitamin D used to treat deficiencies or conditions requiring higher levels of vitamin D. Monitoring levels helps prevent overuse, which can lead to toxicity, such as hypercalcemia (high blood calcium), kidney stones, or other complications. This test ensures your prescribed dose is appropriate for your needs and helps adjust treatment if necessary.
Short name
Vitamin D Analog Level
Frequently asked questions
What does a low or high level of this test mean?
How often will I need this test?
Can I eat or drink anything before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy