D51.1
Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuria
Clinical Classification Guidelines
Inclusion Terms
- Imerslund (Gräsbeck) syndrome
- Megaloblastic hereditary anemia
Medical Intelligence & Overview
Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuria, classified under ICD-10 code D51.1, is a specific type of anemia resulting from the body's inability to properly absorb vitamin B12. This condition often involves features of Imerslund-Gräsbeck syndrome, a hereditary disorder that combines megaloblastic anemia with protein loss through urine. Recognizing this condition is crucial for appropriate management and treatment.
Causes & Symptoms
Clinical Causes: Imerslund-Gräsbeck syndrome, a hereditary disorder affecting vitamin B12 absorption Genetic mutations impacting the intrinsic factor receptor or cubilin and amnionless genes involved in B12 absorption Selective malabsorption of vitamin B12 without deficiency of other nutrients Proteinuria, or excess protein loss in urine, associated with renal or gastrointestinal abnormalities
Key Symptoms: Fatigue and weakness Pale skin due to anemia Shortness of breath upon exertion Pale or jaundiced sclera (whites of the eyes) Loss of appetite and weight loss Digestive issues such as diarrhea Neurological symptoms like numbness or tingling in the hands and feet Frequent or persistent infections due to compromised immune function Presence of protein in the urine (proteinuria)
Diagnostic & Treatment
Diagnosis Path: Diagnosis involves blood tests revealing macrocytic anemia and low vitamin B12 levels, alongside urine tests indicating proteinuria. Additional investigations may include genetic testing to identify mutations associated with Imerslund-Gräsbeck syndrome and absorption studies to assess the gastrointestinal uptake of vitamin B12. Bone marrow examination can show megaloblastic changes typical of vitamin B12 deficiency.
Treatment Protocols: Management focuses on correcting vitamin B12 deficiency through lifelong supplementation, commonly via intramuscular injections or high-dose oral supplements. Addressing proteinuria involves monitoring renal function and managing any underlying renal or gastrointestinal issues. Genetic counseling may be recommended for affected families. Regular follow-up is necessary to monitor hematologic response and prevent complications.
Clinical Advice & FAQs
Billing Guidance
Is D51.1 a billable ICD-10 code?
Yes, D51.1 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report D51.1?
Clinical documentation must specify the nature of Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuria and any associated comorbidities for accurate reporting.
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