D51.2
Transcobalamin II deficiency
Clinical Classification Guidelines
Medical Intelligence & Overview
Transcobalamin II deficiency is a rare inherited disorder that affects the body's ability to absorb and transport vitamin B12, also known as cobalamin. This vitamin is essential for red blood cell production and nerve function. When the body cannot properly deliver vitamin B12 to where it's needed, it can lead to serious health issues, primarily anemia and neurological problems.
Causes & Symptoms
Clinical Causes: Genetic mutation affecting the transcobalamin II protein Inheritance pattern is autosomal recessive, meaning a person needs to inherit two copies of the faulty gene (one from each parent) to be affected Lack of sufficient production or function of transcobalamin II, which normally binds to vitamin B12 and transports it through the bloodstream to various tissues
Key Symptoms: Symptoms of anemia such as fatigue, weakness, and pallor Difficulty breathing or rapid heartbeat due to reduced oxygen-carrying capacity Neurological issues like numbness, tingling in hands and feet, or developmental delays Growth delays in infants and children Possible glossitis, which is inflammation of the tongue
Diagnostic & Treatment
Diagnosis Path: Diagnosing transcobalamin II deficiency involves a combination of blood tests and genetic analysis. Clinicians may look for low levels of vitamin B12 in the blood, along with signs of anemia. Specific tests may measure transcobalamin II levels or evaluate the activity of associated metabolic pathways. Genetic testing helps confirm the diagnosis by identifying mutations in the affected gene.
Treatment Protocols: Management of transcobalamin II deficiency typically includes vitamin B12 supplementation, often through injections or high-dose oral therapy. Early diagnosis and treatment are crucial to prevent long-term neurological damage and severe anemia. Regular monitoring of blood counts and vitamin B12 levels helps guide ongoing treatment. In some cases, additional supportive therapies may be recommended to address symptoms or complications.
Clinical Advice & FAQs
Billing Guidance
Is D51.2 a billable ICD-10 code?
Yes, D51.2 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report D51.2?
Clinical documentation must specify the nature of Transcobalamin II deficiency and any associated comorbidities for accurate reporting.
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