Mitochondrial Complex I Deficiency Nuclear Type 4 C4748753
A severe genetic disorder affecting the mitochondria's energy production system. It can impact multiple organ systems, especially high-energy organs. Treatment aims to manage complications and support function.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Encephalopathy
Cardiac arrhythmias
Fatigue or weight changes
(metabolic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Mitochondrial myopathy
(metabolic)Growth retardation
(metabolic)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
Complex B Vitamin Supplementation
B vitamins serve as cofactors in mitochondrial energy metabolism and may support residual complex I function. Thiamine (B1) and riboflavin (B2) are particularly important.
Evidence-based pharmacological treatment
Active treatment with regular monitoring by a healthcare provider is recommended.
Avoidance of Fasting Protocols
Regular meal scheduling with complex carbohydrates to prevent metabolic stress from fasting, which can exacerbate mitochondrial dysfunction and lead to metabolic decompensation.
Additional treatment options
Neurological Assessment Program
Regular neurological examinations including developmental assessments, seizure monitoring, and neuroimaging to track disease progression and detect complications early.
monitoringFeeding Tube Placement (G-tube)
For patients with significant feeding difficulties or risk of aspiration, gastrostomy tube placement ensures adequate nutrition and medication delivery while preventing metabolic stress from inadequate intake.
procedureFamily Support and Genetic Counseling
Psychological support for patients and families combined with genetic counseling to understand inheritance patterns, recurrence risks, and family planning options.
psychologicalWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is Mitochondrial Complex I Deficiency Nuclear Type 4 C4748753?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication Comparisons
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View Medication ComparisonsThis 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 20, 2026. · Read our editorial policy