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D50.8 Iron Deficiency Anaemia – Causes and Treatment
D50.8 is the ICD-10 code for other iron deficiency anaemias. This form of anaemia results from insufficient iron and causes fatigue, pallor, and reduced physical performance.
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D50.8 is the ICD-10 code for other iron deficiency anaemias. This form of anaemia results from insufficient iron and causes fatigue, pallor, and reduced physical performance.
What is D50.8?
The ICD-10 code D50.8 refers to other iron deficiency anaemias – forms of anaemia caused by a lack of iron that do not fall under the more specific subcategories D50.0 (sideropenic dysphagia) or D50.1 (iron deficiency anaemia secondary to blood loss). Anaemia occurs when the concentration of haemoglobin – the red blood pigment responsible for oxygen transport – falls below the normal range. Since iron is a core component of haemoglobin, insufficient iron directly impairs the blood's ability to carry oxygen.
Causes
Iron deficiency anaemia classified under D50.8 can have a variety of causes:
- Dietary insufficiency: Low dietary iron intake, common in vegetarian or vegan diets without adequate compensation.
- Malabsorption: Conditions such as coeliac disease, Crohn's disease, or post-gastric surgery states can impair iron absorption in the intestine.
- Increased iron demand: Pregnancy, breastfeeding, and periods of rapid growth significantly increase the body's iron requirements.
- Chronic inflammatory conditions: Ongoing inflammation can interfere with iron metabolism and utilisation.
- Medication interactions: Proton pump inhibitors and certain antacids reduce stomach acid and thereby impair iron absorption.
Symptoms
Symptoms of iron deficiency anaemia (D50.8) often develop gradually and may include:
- Persistent fatigue and exhaustion
- Paleness of the skin and mucous membranes
- Shortness of breath during physical exertion
- Rapid heartbeat (tachycardia)
- Dizziness and headaches
- Difficulty concentrating
- Brittle nails and hair loss
- Angular cheilitis (cracked corners of the mouth)
Diagnosis
Diagnosis is confirmed through a blood test. Key laboratory parameters include:
- Haemoglobin (Hb): Reduced in anaemia.
- Serum ferritin: The most important marker for iron stores; low levels indicate iron deficiency.
- Serum iron and transferrin saturation: Both are reduced in iron deficiency.
- MCV (mean corpuscular volume): Reduced, indicating microcytic anaemia typical of iron deficiency.
The underlying cause is also investigated, for example through stool tests for occult blood, gastroscopy, or colonoscopy.
Treatment
Treatment depends on the severity and underlying cause of the iron deficiency:
- Oral iron supplements: Iron sulfate, iron gluconate, or iron fumarate are commonly prescribed as tablets or drops. Taking iron on an empty stomach and with vitamin C improves absorption.
- Intravenous iron therapy: Used in cases of severe anaemia, malabsorption, or intolerance to oral preparations.
- Blood transfusion: Reserved for life-threatening anaemia or very severe cases.
- Treatment of the underlying cause: Addressing the root cause (e.g., managing malabsorption or stopping a chronic bleed) is essential for long-term recovery.
- Dietary adjustments: Increasing intake of iron-rich foods such as red meat, legumes, spinach, and whole grains.
References
- World Health Organization (WHO): Iron Deficiency Anaemia: Assessment, Prevention, and Control. Geneva, 2001.
- Camaschella C: Iron-Deficiency Anemia. New England Journal of Medicine, 2015; 372(19): 1832–1843.
- Goddard AF et al.: Guidelines for the management of iron deficiency anaemia. Gut, 2011; 60(10): 1309–1316.
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