D64.9
Anemia, unspecified
D64.9 is a clinical diagnosis used for anemia when the specific type or underlying etiology has not been identified or documented. Anemia is characterized by a decrease in the total amount of red blood cells (RBCs) or hemoglobin in the blood, leading to a lowered ability of the blood to carry oxygen to body tissues. While D64.9 is a billable code, clinical best practice encourages further investigation to classify the anemia—such as microcytic, macrocytic, or normocytic—and identify causes like nutritional deficiencies, chronic disease, or hemolysis to provide more specific coding and targeted treatment.
Clinical Symptoms
- Generalized fatigue and lethargy
- Pallor (pale skin, especially in conjunctiva or nail beds)
- Shortness of breath (dyspnea) on exertion
- Tachycardia or heart palpitations
- Dizziness or lightheadedness
- Cold hands and feet
- Headaches
Common Causes
- Acute or chronic blood loss
- Decreased production of red blood cells in the bone marrow
- Increased destruction of red blood cells (hemolysis)
- Nutritional deficiencies (Iron, B12, Folate) prior to specific diagnosis
- Chronic inflammatory conditions or infections
Documentation & Coding Tips
Avoid using unspecified codes if a more specific diagnosis is available in the medical record.
Example: If laboratory results indicate low ferritin and microcytic RBCs, document 'Iron deficiency anemia' (D50.9) instead of 'Anemia' (D64.9).
Document the relationship between anemia and other chronic conditions.
Example: If the anemia is caused by Stage 4 Chronic Kidney Disease, document 'Anemia in CKD' to allow for the use of the more specific code D63.1.
Specify if the anemia is acute or chronic when possible.
Example: Use 'Acute posthemorrhagic anemia' (D62) if the condition follows a recent surgical bleed or trauma.