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Serum Calcium (with Electrophoresis-Based Qualitative Screening for Hypocalcemia)

Published: August 9, 2026Updated: August 16, 2026

This test measures calcium levels in your blood, which is important for bone health, muscle function, and nerve signaling. It may also be used to screen for conditions affecting calcium balance.

Quick summary

["Checks if your calcium levels are within a healthy range and helps identify potential imbalances early."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
26156-0
Short code
XR Scapula-R Views
Synonyms
XR Scapula-R Views
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
xr
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 Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like muscle cramps, bone pain, or unusual fatigue. It could also be part of routine checks for conditions like osteoporosis, kidney disease, or metabolic disorders.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. If you’re on blood thinners or have a history of bleeding issues, let your provider know.

What the Test Results Mean

Results help determine if your calcium levels are too high or too low. Abnormal levels can signal conditions like hyperparathyroidism, vitamin D deficiency, or kidney problems.

Common Conditions Linked to Abnormal Results

High calcium levels (hypercalcemia) may cause fatigue, nausea, or kidney stones. Low calcium levels (hypocalcemia) can lead to muscle spasms, numbness, or irregular heart rhythms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Serum Calcium Screening

Frequently asked questions

Will I need to fast before this test?
No fasting is required for this test. However, inform your provider if you’re taking medications that affect calcium levels, such as certain vitamins or blood pressure drugs.
How long will it take to get my results?
Results are typically available within a few days, depending on your lab’s processing time. Follow up with your provider if you have questions about your results.
Can I take anything after the blood draw?
Yes, you can eat and drink normally after the blood draw. Avoid heavy meals or alcohol immediately afterward to prevent discomfort.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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 16, 2026. · Read our editorial policy