ICD-10 Code D47.4 – Osteomyelofibrosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D47.4 – Osteomyelofibrosis
What it is
Osteomyelofibrosis is a chronic bone marrow disorder marked by fibrous tissue replacing normal marrow. It impairs blood cell production and is coded when documentation specifically identifies this condition.
Clinical signs
Clinical features may include anemia, fatigue, splenomegaly, and abnormal blood counts. Findings can vary, so use the documented diagnosis and supporting hematology or pathology notes.
When to use this code
Use D47.4 when the provider documents osteomyelofibrosis as the final diagnosis. This applies in outpatient, inpatient, or consult notes when the condition is confirmed or clearly established. If the record only suggests marrow fibrosis without a named diagnosis, check documentation.
Do not use for
Do not assign this code for nonspecific anemia, splenomegaly, or other marrow disorders without documented osteomyelofibrosis. Do not use it when a different myeloproliferative or fibrotic condition is specified.
Coding tip
Code only the exact diagnosis stated by the provider; if wording is unclear, query for clarification before assigning D47.4.