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Chloridebldvscnc

Published: July 31, 2026Updated: August 10, 2026

A chloride test measures the amount of chloride in your venous blood, which helps evaluate your body's electrolyte balance and kidney function.

Quick summary

{"Chloride is an electrolyte that helps maintain fluid balance in your body","Abnormal chloride levels may indicate kidney problems, dehydration, or electrolyte imbalances","The test is performed on a simple blood sample from a vein","Results are often interpreted together with other electrolytes like sodium and potassium","Your doctor will explain what your specific results mean for your health"}

Medically reviewed by WellAlly Editorial TeamLast reviewed August 10, 2026Editorial policy

Key facts at a glance

LOINC
41649-5
Short code
Cl
Synonyms
Chloride BldV-sCnc
Category
electrolyte
Sample
whole-blood
Container
Serum separator tube (SST) or lithium heparin green top tube; also acceptable in sodium heparin or EDTA tubes
Units
not specified
Ref low
96
Ref high
106
Critical range
70 not specified – 120 not specified
Fasting
false
Population
adult
Sex
all
Age range
≥ 0 years
Method
Ion-selective electrode (ISE) or indirect potentiometry
CPT
82435
SNOMED
365761006
Specimen volume
2-5 mL of whole blood
Stability
Room temperature: 7 days; Refrigerated (2-8°C): 2 weeks; Frozen (-20°C): several months. Avoid repeated freeze-thaw cycles.
Hemolysis max
50
Lipemia max
300
Icterus max
20
TAT
1–4 hours
Order
routine

What is this test?

A chloride blood test measures the concentration of chloride, an important electrolyte, in your venous blood. Chloride is a negatively charged ion that works with other electrolytes like sodium and potassium to maintain proper fluid balance, support nerve function, and aid in digestion. This test is commonly part of a comprehensive metabolic panel or electrolyte panel.

Why is it important?

Chloride plays a crucial role in maintaining the body's acid-base balance (pH level) and ensuring proper muscle contraction and nerve transmission. It also helps regulate the amount of fluid in and around your cells. When chloride levels are too high or too low, it can indicate underlying health problems that need attention.

How is the test performed?

A healthcare professional will draw a small blood sample from a vein in your arm using a needle. The procedure is quick and typically takes only a few minutes. You may feel a brief sting or pinch when the needle is inserted. The blood sample is then sent to a laboratory for analysis.

How to prepare

Generally, no special preparation is required for a chloride test. However, your doctor may ask you to fast (not eat or drink) for a specific period if the test is part of a larger panel that requires fasting. Always follow any specific instructions provided by your healthcare provider. Inform your doctor about all medications and supplements you are taking, as certain drugs can affect test results.

Reference range

96-106 mmol/Lnot specified

Specimen: whole-blood

No fasting or special preparation required

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

What is a normal chloride level?
Normal chloride levels typically range from about 96 to 106 milliequivalents per liter (mEq/L). The exact reference range may vary slightly depending on the laboratory and testing methods used. Your doctor will interpret your results based on your individual health situation.
Do I need to fast before the test?
Fasting is usually not required for a standalone chloride test. However, if your chloride test is part of a comprehensive metabolic panel that includes glucose or other tests requiring fasting, your doctor will instruct you to fast for 8-12 hours before the blood draw.
What happens if my chloride levels are abnormal?
Abnormal chloride levels alone do not diagnose a specific condition. Your doctor will consider your chloride result along with other electrolyte levels, symptoms, medical history, and other test results to determine the cause. Treatment, if needed, will depend on addressing the underlying cause of the imbalance.
Can medications affect my chloride levels?
Yes, certain medications can affect chloride levels. These include diuretics (water pills), corticosteroids, non-steroidal anti-inflammatory drugs (NSAIDs), and certain blood pressure medications. Always inform your doctor about all medications, supplements, and herbal remedies you are taking.
Is the test safe?
The chloride blood test is a common and generally safe procedure. Risks are minimal and may include slight bruising, bleeding, or soreness at the puncture site. In rare cases, fainting or infection may occur. The benefits of obtaining important health information far outweigh these minimal risks.
  1. 1
    MedlinePlus - Chloride Blood TestSource
  2. 2
    Mayo Clinic - Chlorides (Blood)Source
  3. 3
    National Library of Medicine - ElectrolytesSource

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 10, 2026. · Read our editorial policy