Abnormal Circulating Homocysteine Concentration C4023651
Homocysteine is an amino acid that at high levels may increase heart disease risk. It can rise due to genetic factors or B vitamin deficiencies. Treatment often involves dietary changes and supplementation.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Increased blood clot risk
Elevated risk of abnormal blood clot formation that can lead to deep vein thrombosis or pulmonary embolism.
EMERGENCY: Seek immediate care for sudden shortness of breath, chest pain, or leg swelling/redness.
Chest pain or discomfort
Angina-like chest pain that may indicate increased cardiovascular strain.
EMERGENCY: Chest pain requires immediate medical evaluation to rule out cardiac events.
Persistent fatigue and weakness
(constitutional)Generalized tiredness and lack of energy that persists despite adequate rest.
Frequency: 70-80% of patients
Cognitive difficulties and memory problems
(neurologic)Trouble with concentration, memory recall, and mental clarity.
Frequency: 50-60% of patients
Numbness and tingling sensations
(neurologic)Paresthesia (pins and needles sensation) often in hands and feet due to nerve involvement.
Frequency: 40-50% of patients
Skin changes and lesions
(dermatologic)Rash, skin discoloration, or eczema-like patches, particularly on sun-exposed areas.
Frequency: 15-25% of patients
Difficulty with balance and gait
(neurologic)Unsteady walking, balance problems, or coordination difficulties.
Frequency: 10-15% of patients
Vision disturbances
(neurologic)Blurred vision or other visual changes related to optic nerve involvement.
Frequency: 5-10% of patients
Unexplained weight loss
(gastrointestinal)Significant unintentional weight loss without changes in diet or exercise.
Frequency: 5-10% 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
B-vitamin supplementation
Folic acid, vitamin B12, and vitamin B6 supplementation to address common causes of hyperhomocysteinemia. These cofactors are essential for homocysteine metabolism and clearance.
Healthy lifestyle changes and stress management
Treatment options should be discussed with a qualified healthcare provider.
Folate-rich food intake
Increased consumption of folate-dense foods including leafy green vegetables, legumes, avocados, and fortified grains. Dietary folate supports normal homocysteine metabolism.
Additional treatment options
Smoking cessation
Complete cessation of tobacco use as smoking significantly elevates homocysteine levels and impairs B-vitamin metabolism. Cessation improves cardiovascular risk profile.
lifestyleModerate physical activity
Regular aerobic exercise improves endothelial function and can help lower homocysteine levels. Exercise enhances overall cardiovascular health and supports methyl-group metabolism.
lifestyleCardiovascular risk stratification
Comprehensive assessment including homocysteine levels, lipid profile, blood pressure, and diabetes screening. Elevated homocysteine indicates increased cardiovascular and thrombotic risk.
monitoringWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Abnormal Circulating Homocysteine Concentration C4023651?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Powers WJ, Rabinstein AA, Ackerson T, et al. Guidelines for the Early Management of Acute Ischemic Stroke: 2019 Update to the 2018 Guidelines for the Early Management of Acute Ischemic Stroke. Stroke. 2019;50:e344–e418.
Piepoli MF, Hoes AW, Agewall S, et al. 2016 European Guidelines on cardiovascular disease prevention in clinical practice. Eur Heart J. 2016;37:2315-2381.
Martí-Carvajal AJ, Solà I, Lathyris D, et al. Homocysteine-lowering interventions for preventing cardiovascular events. Cochrane Database Syst Rev. 2017;1:CD006612.
O'Neill C, O'Driscoll L. Metabolic syndrome: a closer look at the growing epidemic and its associated pathologies. Obes Rev. 2015;16:1-12.
American College of Medical Genetics and Genomics. Clinical utility of genetic testing in disorders of sulfur metabolism. ACMG Technical Standards and Guidelines. 2019.
Stampfer MJ, Malinow MR. Can lowering homocysteine levels reduce cardiovascular risk? N Engl J Med. 1995;332:328-329.
Klee GG. Cobalamin and folate evaluation: measurement of methylmalonic acid and homocysteine vs vitamin B12 and folate. Clin Chem. 2000;46:1277-1283.
National Institutes of Health Consensus Development Panel. Homocysteine, B vitamins, and cardiovascular disease. JAMA. 1998;280:2008-2014.
Homocysteine Studies Collaboration. Homocysteine and risk of ischemic heart disease and stroke: a meta-analysis. JAMA. 2002;288:2015-2022.
Scriver CR, Beaudet AL, Sly WS, et al., eds. The Metabolic and Molecular Bases of Inherited Disease. 8th ed. New York: McGraw-Hill; 2001:2007-2056.
Medication 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