ICD-10-CM 2027
ICD-10 code for idiopathic chronic myelofibrosis
From the official ICD-10-CM alphabetic index entry “Myelofibrosis › idiopathic (chronic)”. Page updated September 29, 2026.
About coding idiopathic chronic myelofibrosis
The ICD-10-CM code for idiopathic chronic myelofibrosis is D47.4 (Osteomyelofibrosis).
Within D47 (other neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue), D47.4 is specifically for Osteomyelofibrosis. Related codes cover mast cell neoplasms of uncertain behavior (D47.0), chronic myeloproliferative disease (D47.1), monoclonal gammopathy (D47.2), essential (hemorrhagic) thrombocythemia (D47.3), neoplasm of uncertain behavior of lymphoid, hematopoietic and related tissue, unspecified (D47.9) and other specified neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue (D47.Z).
Don't report D47.4 together with the conditions in its Excludes1 note: acute myelofibrosis (C94.4-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Don't confuse with (Excludes1 for D47.4)
- acute myelofibrosis (C94.4-)
Common questions about idiopathic chronic myelofibrosis ICD-10 codes
What is the ICD-10 code for idiopathic chronic myelofibrosis?
- D47.4 — Osteomyelofibrosis.
Is D47.4 billable?
- Yes. D47.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can D47.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict D47.4 as a principal diagnosis.
Is D47.4 a CC or MCC?
- No. D47.4 is neither a CC nor an MCC under MS-DRG v44.0.