E67.3 Hypervitaminosis D

Name of the Condition

• Hypervitaminosis D

Summary

Hypervitaminosis D is a condition characterized by excessive levels of vitamin D in the body, leading to toxic effects. This can result from overconsumption of vitamin D supplements, certain medications, or prolonged exposure to high-dose vitamin D therapy. The condition may affect multiple organ systems, including the kidneys, bones, and cardiovascular system.

Causes

The primary cause is excessive intake of vitamin D, particularly from supplements or medications containing high doses of cholecalciferol or ergocalciferol. This can occur through intentional overuse of vitamin D supplements, therapeutic dosing without proper monitoring, or consumption of fortified foods in excess. Chronic exposure to lower doses may also lead to toxicity over time.

Risk Factors

• High-dose vitamin D supplementation without medical supervision.
• Consumption of fortified foods or supplements in excess.
• Certain medical conditions requiring long-term vitamin D therapy (e.g., osteoporosis).
• Lack of awareness regarding safe vitamin D intake limits.

Symptoms

• Nausea, vomiting, or abdominal pain.
• Weakness, fatigue, or confusion.
• Increased thirst or urination.
• Kidney stones or renal dysfunction.
• Bone pain or joint stiffness.
• Elevated calcium levels (hypercalcemia) leading to cardiac or neurological symptoms.

Diagnosis

Diagnosis typically involves assessing dietary intake, supplement use, and clinical evaluation. Laboratory tests may be used to identify elevated vitamin D levels (25-hydroxyvitamin D) and hypercalcemia, and to rule out other conditions. Imaging or additional tests may assess organ involvement.

Treatment Options

Treatment focuses on discontinuing vitamin D supplementation and reducing intake. In severe cases, hydration, medications to lower calcium levels (e.g., bisphosphonates), or dialysis may be necessary. Monitoring of vitamin D and calcium levels is essential during recovery.

Prognosis and Follow-Up

Prognosis is generally good with early intervention and discontinuation of excess vitamin D. Follow-up involves regular monitoring of vitamin D and calcium levels to ensure normalization and prevent recurrence. Long-term complications may occur if toxicity is severe or prolonged.

Complications

• Kidney damage or failure.
• Cardiovascular issues due to hypercalcemia.
• Bone demineralization or fractures.
• Neurological symptoms from elevated calcium levels.

Lifestyle & Prevention

• Avoid excessive vitamin D supplementation without medical guidance.
• Follow recommended daily intake guidelines for vitamin D.
• Monitor intake of fortified foods and supplements.
• Consult a healthcare provider before starting high-dose vitamin D therapy.

When to Seek Professional Help

Seek medical attention if experiencing symptoms of hypervitaminosis D, such as nausea, weakness, or increased thirst, especially if taking vitamin D supplements or fortified foods. Prompt evaluation is important to prevent complications.

Tips for Medical Coders

Document the clinical findings, vitamin D levels, and any contributing factors (e.g., supplement use) to support the diagnosis. Ensure the code E67.3 is assigned when hypervitaminosis D is confirmed, and include details on the underlying cause or treatment in the medical record for accurate coding and billing.