ICD10 code of Evans Syndrome and ICD9 code

Evans Syndrome does not have its own unique, dedicated code in the ICD-10 or ICD-9 systems because it is a clinical diagnosis defined by the simultaneous or sequential occurrence of two distinct autoimmune conditions. Clinicians typically use a combination of codes, most commonly ICD-10 D69.3 (Autoimmune thrombocytopenic purpura) and ICD-10 D59.1 (Other autoimmune hemolytic anemias), to accurately document the patient's full clinical profile.

What is the clinical definition of Evans Syndrome?

Evans Syndrome is a rare, chronic autoimmune disorder characterized by the body’s immune system mistakenly attacking its own red blood cells and platelets. This leads to two primary conditions: autoimmune hemolytic anemia (AIHA) and immune thrombocytopenia (ITP). Because Evans Syndrome is a diagnosis of exclusion—meaning other underlying illnesses like systemic lupus erythematosus or primary immunodeficiencies must first be ruled out—coding it requires capturing both the anemia and the thrombocytopenia components separately in medical records to ensure accurate billing and clinical documentation.

How do medical professionals document Evans Syndrome?

Since there is no single ICD-10 code for the syndrome itself, healthcare providers use a combination of codes to reflect the complexity of the disease. When managing a patient with Evans Syndrome, the documentation must reflect the dual nature of the cytopenias. Common coding practices include:

• ICD-10 D69.3: Used for the immune thrombocytopenia component.


• ICD-10 D59.1: Used for the autoimmune hemolytic anemia component.


• ICD-9 287.31: Historically used for ITP, though this is now largely superseded by ICD-10.


• ICD-9 283.0: Historically used for autoimmune hemolytic anemias.

Why is accurate diagnosis and coding important for Evans Syndrome patients?

Accurate coding is vital not only for insurance reimbursement but also for tracking the prevalence of Evans Syndrome in global health registries. Because the condition is rare—with an estimated prevalence that remains difficult to define precisely due to underdiagnosis—robust documentation helps researchers identify patient cohorts for clinical trials. At DiseaseMaps.org, 110 people with Evans Syndrome have joined our community, sharing their experiences to help others navigate the diagnostic journey and the complexities of long-term treatment management.

Is Evans Syndrome hereditary?

While most cases of Evans Syndrome are considered sporadic (occurring without a family history), there is a subset of patients, particularly children, who may have an underlying genetic predisposition. Some patients with Evans Syndrome are found to have mutations in genes involved in immune regulation, such as CTLA4, LRBA, or STAT3. If you are experiencing recurrent episodes, your clinical geneticist may recommend genetic testing to determine if your Evans Syndrome is a manifestation of an underlying primary immunodeficiency disorder.

Next steps

• Consult with a hematologist-oncologist who specializes in autoimmune blood disorders to ensure your treatment plan is evidence-based.


• Request a referral to a clinical geneticist if you have a family history of autoimmune disease or early-onset symptoms.


• Join the Evans Syndrome community at DiseaseMaps.org to connect with other patients and share resources on symptom management and treatment efficacy.


• Maintain a personal health record that lists both your anemia and thrombocytopenia diagnoses to ensure all providers understand the full scope of your condition.

Medical disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment; always seek the advice of your physician or other qualified health provider with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Evans Syndrome Overview.


• Orphanet: Rare Disease Database (ORPHA:3297).


• National Organization for Rare Disorders (NORD): Evans Syndrome Patient Guide.


• OMIM (Online Mendelian Inheritance in Man): Clinical features and genetic associations of autoimmune cytopenias.