Chloride · low result
What does a low Chloride mean?
Short answer
Low chloride most often accompanies low sodium (overhydration, diuretics, SIADH, heart failure) or a high bicarbonate (vomiting, loop diuretics, low potassium, Cushing's). Chronic lung disease with CO2 retention also lowers it as the body compensates. Read with sodium, CO2 and the clinical story.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
What is the normal range for Chloride?
- age 18+: 98.0 – 107 mmol/L
Full reference table, citations and testing options: Chloride biomarker page.
What are the common causes of low Chloride?
- Diuretics (thiazide and loop)
- Vomiting or nasogastric losses, low potassium
- Overhydration, SIADH, heart failure, cirrhosis
- Chronic CO2 retention (COPD)
- Adrenal insufficiency, Cushing's syndrome
What symptoms go with low Chloride?
- Usually none; weakness, cramps or dehydration symptoms from the underlying cause
What do clinicians usually check next?
- Sodium, potassium, CO2, kidney function
- Medication and fluid-intake review
How do you recheck Chloride?
Prices are cash-pay; every order adds one $6 lab processing fee. Physician authorization is included; no insurance or referral needed.
| Test or panel | Type | Price | Fasting | Results |
|---|---|---|---|---|
| Basic Metabolic Panel | Test · 8 biomarkers | $20.99 | Yes | 1–3 business days |
Common questions
My chloride is 96 — should I worry?
A point or two below range with everything else normal is not meaningful. Look at sodium and CO2; if they are normal too, no action.
Sources
Educational content, not a diagnosis. Lab results are one input; a clinician interprets them with your history and exam.