Abnormal Circulating Neopterin Concentration C4073154
Neopterin is a substance produced by the immune system. Abnormal levels in blood may indicate immune activation or inflammation and can be associated with infections or other conditions. Treatment focuses on identifying and addressing the underlying cause.
Key facts at a glance
- ICD-10
- D89.9
- ICD-11
- 3A00.0
- Body system
- immunologic
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Shortness of breath
Difficulty breathing or feeling of breathlessness, especially during physical activity.
Seek immediate medical attention if shortness of breath is sudden, severe, or occurs at rest.
Fatigue
(constitutional)Persistent feeling of tiredness and lack of energy that does not improve with rest.
Frequency: 70-80% of patients
Fever
(constitutional)Elevated body temperature often accompanied by chills and sweating.
Frequency: 80-90% of patients
Headache
(neurologic)Persistent or recurring pain in the head region that may range from mild to severe.
Frequency: 60-70% of patients
Muscle aches
(musculoskeletal)Generalized muscle pain and soreness affecting multiple muscle groups.
Frequency: 50-60% of patients
Night sweats
(constitutional)Excessive sweating during sleep that often soaks clothing and bedding.
Frequency: 40-50% of patients
Unexplained weight loss
(constitutional)Significant weight loss without changes in diet or exercise habits.
Frequency: 20-30% of patients
Skin rash
(dermatologic)Various types of skin eruptions including red patches, bumps, or itching.
Frequency: 15-25% of patients
Abdominal pain
(gastrointestinal)Discomfort or pain in the abdominal region that may vary in intensity.
Frequency: 20-30% of patients
Enlarged lymph nodes
(hematologic)Swelling of lymph nodes, typically in the neck, armpits, or groin area.
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
Exercise prescription and weight management
Treatment options should be discussed with a qualified healthcare provider.
Immune-modulating therapy
Treatment targeting the underlying inflammatory or immune-mediated condition driving elevated neopterin production, such as autoimmune or infectious disorders.
Neopterin level trending
Serial measurement of circulating neopterin as a biomarker to assess disease activity and treatment response in inflammatory conditions.
Additional treatment options
Antioxidant supplementation
Supportive therapy with antioxidants to potentially reduce oxidative stress component contributing to immune activation and neopterin elevation.
complementaryStress reduction and sleep optimization
Behavioral modifications to reduce physiological stress, improve sleep quality, and support natural immune regulation mechanisms.
lifestyleChronic illness counseling
Psychological support addressing the emotional impact of managing chronic inflammatory conditions associated with elevated neopterin markers.
psychologicalWhen 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 Neopterin Concentration C4073154?
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.
Murr C, Widner B, Wirleitner B, Fuchs D. Neopterin as a marker for immune system activation. Pteridines. 2002;13(3):91-102.
Fuchs D, Avanzas P, Arroyo-Espliguero R, Jenny M, Ziesemer J, Murr C. The role of neopterin in atherosclerosis and other cardiovascular diseases. J Cardiovasc Risk. 2001;8(3):143-150.
Hoffmann G, Schobersberger W, Frede S, et al. Neopterin activates the nitric oxide pathway in human umbilical vein endothelial cells. Pteridines. 1996;7(1):37-41.
Berdowska A, Zwirska-Korczala K. Neopterin measurement in clinical practice. Curr Pharm Biotechnol. 2004;5(2):107-115.
Wirleitner B, Neurauter G, Schröcksnadel K, Winkler C, Fuchs D. Interferon-gamma (IFN-gamma)-mediated immune responses and neopterin. Pteridines. 2005;16(1):24-34.
Ray KK, Nestel PJ, Linsel J, Toth I. Neopterin: a promise in cardiovascular medicine? Future Cardiol. 2006;2(5):551-559.
Fuchs D, Hausen A, Reibnegger G, Werner ER, Dierich MP, Wachter H. Neopterin as a marker for activated cell-mediated immunity: application in HIV infection. Immunol Today. 1988;9(5):150-155.
Mellander L, Björkander L, Nilsson B. Neopterin and the immune response in primary immunodeficiencies. J Clin Immunol. 1986;6(3):227-235.
Hamerlinck FF. Neopterin: a review. Exp Dermatol. 1999;8(3):167-176.
Fuchs D, Wachter H, Weiss G. Neopterin and human immunodeficiency virus infection. In: Textbook of AIDS Medicine. 3rd ed. Lippincott Williams & Wilkins; 2009:245-260.
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