D61.03

HCC Category Mapping

What This Code Means

Fanconi anemia is a rare inherited blood disorder that affects the bone marrow's ability to produce blood cells, leading to low counts of red blood cells, white blood cells, and platelets. Patients with this condition have an increased risk of developing certain cancers and may experience fatigue, infections, and bleeding problems.

Coding Tips

• •Fanconi anemia is a genetic disorder; verify documentation specifies the type or subtype if available, as there are multiple complementation groups (A through Q)
• •When coding Fanconi anemia, look for associated complications such as cytopenias, infections, or malignancies that should be coded separately to capture the full clinical picture

Clinical Significance

Fanconi anemia is a rare autosomal recessive (or rarely X-linked) inherited bone marrow failure syndrome caused by mutations in DNA repair pathway genes, characterized by progressive pancytopenia, congenital anomalies, and a markedly elevated risk of malignancies. Physical findings may include short stature, cafe-au-lait spots, thumb and radial ray abnormalities, renal malformations, and microcephaly, though up to 30% of patients have no visible anomalies. The median age of bone marrow failure onset is 7 years, with lifetime risks of approximately 50% for acute myeloid leukemia and 25% for head and neck squamous cell carcinomas.

Documentation Requirements

• ✓Document chromosomal breakage analysis (mitomycin C or diepoxybutane testing) confirming Fanconi anemia diagnosis.
• ✓Record the specific complementation group (FANCA through FANCQ) when genetic testing has been performed.
• ✓Include complete blood count trends showing progressive cytopenias, bone marrow biopsy findings, and any congenital anomalies documented on physical examination or imaging.
• ✓Document treatment including androgen therapy, hematopoietic growth factors, transfusion history, and stem cell transplant status.
• ✓Note any malignancy surveillance performed.

Commonly Confused Codes