Abnormal Blood Carbon Dioxide Level C5139562
An abnormal level of carbon dioxide in the blood, which may be too high or too low. It can result from lung disease, metabolic conditions, or other health problems. Treatment involves addressing the underlying cause and, if needed, supporting breathing or oxygen delivery.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- moderate
- Chronic
- false
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Loss of consciousness
Fainting or passing out, which may be preceded by dizziness or confusion.
This is a medical emergency. Call emergency services immediately.
Blue lips or fingertips
Bluish discoloration of the lips, tongue, or fingertips indicating poor oxygenation.
This is a medical emergency. Seek immediate emergency care.
Shortness of breath
(respiratory)Difficulty breathing or feeling like you cannot get enough air, which may worsen with activity.
Frequency: 70-80% of patients
Headache
(neurologic)Persistent or throbbing headache, often worse in the morning due to CO2 buildup during sleep.
Frequency: 60-70% of patients
Confusion or disorientation
(neurologic)Mental confusion, difficulty concentrating, or feeling mentally foggy.
Frequency: 40-50% of patients
Rapid heart rate
(cardiovascular)Heart beats faster than normal, often felt as palpitations in the chest.
Frequency: 35-45% of patients
Dizziness or lightheadedness
(neurologic)Feeling unsteady, faint, or like the room is spinning.
Frequency: 20-30% of patients
Fatigue and weakness
(constitutional)Persistent tiredness, lack of energy, or general weakness throughout the day.
Frequency: 40-50% of patients
Muscle twitching
(neurologic)Involuntary muscle spasms or tremors, often in the hands or face.
Frequency: 15-25% of patients
Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Arterial blood gas monitoring
Regular ABG analysis to track CO2 levels and guide treatment adjustments. Continuous pulse oximetry may be used for ongoing assessment of oxygenation status alongside CO2 trends.
Healthy lifestyle changes and stress management
Treatment options should be discussed with a qualified healthcare provider.
Non-invasive ventilation support
CPAP or BiPAP therapy to improve ventilation and help normalize CO2 levels by supporting respiratory effort. Typically initiated if lifestyle and respiratory therapy prove insufficient.
Additional treatment options
Breathing exercises and pulmonary rehabilitation
Structured diaphragmatic breathing and pursed-lip breathing techniques to improve respiratory efficiency. Pulmonary rehab programs can enhance lung function and gas exchange.
lifestyleBronchodilator therapy
Inhaled bronchodilators to address airway obstruction contributing to CO2 retention. Used when underlying lung pathology such as COPD or asthma is present.
medicationPostural drainage and chest percussion
Positioning techniques combined with manual percussion to mobilize secretions and improve airway clearance. Can enhance ventilation efficiency in patients with mucus hypersecretion.
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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 25, 2026. · Read our editorial policy