2026 ICD-10-CM Diagnosis Code D45Polycythemia vera
ICD-10-CM Codes›C00–D49›D37-D48›D45
- Billable — Valid for Submission
- Chronic Condition
D45 is a billable ICD-10-CM diagnosis code for polycythemia vera. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 820 through 825, 840 through 842. Coders also document this condition as chorea due to polycythemia rubra vera. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neoplasms of unspecified nature or uncertain behavior.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Chorea due to polycythemia rubra vera
- Erythrocytosis due to polycythemia vera
- Myelofibrosis
- Myelofibrosis due to another disorder
- Polycythemia vera
- Polycythemia vera in remission
- Post-polycythemia vera myelofibrosis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- chronic - D45
- Heilmeyer-Schoner disease - D45
- Polycythemia (secondary) - D75.1
- vera - D45
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Erythremia(acute)
- chronic
- Heilmeyer-Schoner disease
- Polycythemia(secondary)
- vera
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Polycythemia Vera
a myeloproliferative disorder of unknown etiology, characterized by abnormal proliferation of all hematopoietic bone marrow elements and an absolute increase in red cell mass and total blood volume, associated frequently with splenomegaly, leukocytosis, and thrombocythemia. hematopoiesis is also reactive in extramedullary sites (liver and spleen). in time myelofibrosis occurs.
Patient EducationClinical
Bone Marrow Diseases
Bone marrow is the spongy tissue inside some of your bones, such as your hip and thigh bones. It contains stem cells. The stem cells can develop into the red blood cells that carry oxygen through your body, the white blood cells that fight infections, and the platelets that help with blood clotting.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert D45 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D45Overview
Is D45 (Polycythemia vera) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report polycythemia vera on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D45 group to?
When polycythemia vera is the principal diagnosis on an inpatient stay, it groups to MS-DRG 820, 821, 822, 823, 824, 825, 840, 841, 842, with relative weights from 1.0104 to 5.8648 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of D45?
Under the General Equivalence Mappings, polycythemia vera converts to ICD-9-CM 207.10 (chr erythrm w/o ach rmsn), 207.11 (chr erythrm w remision), and 207.12 (chr erythrmia in relapse). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
