Short answer · Medically reviewed summary · Last updated: 2026-05-08

The ICD-10 code for Essential Thrombocythemia is D47.3, while the legacy ICD-9 code used for clinical documentation is 238.4. These classification codes are essential for medical billing, diagnostic tracking, and international health reporting for this specific myeloproliferative neoplasm. What is Essential Thrombocythemia? Essential Thrombocythemia is a chronic blood disorder characterized by the overproduction of platelets by megakaryocytes in the bone marrow.

2 people with Essential Thrombocythemia have shared their first-person experience on this question at DiseaseMaps.

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ICD10 code of Essential Thrombocythemia and ICD9 code

ICD-10 and ICD-9 codes for Essential Thrombocythemia, with classification details for clinicians, coders and patients.

ICD9 and ICD10 codes of Essential Thrombocythemia

The ICD-10 code for Essential Thrombocythemia is D47.3, while the legacy ICD-9 code used for clinical documentation is 238.4. These classification codes are essential for medical billing, diagnostic tracking, and international health reporting for this specific myeloproliferative neoplasm.



What is Essential Thrombocythemia?


Essential Thrombocythemia is a chronic blood disorder characterized by the overproduction of platelets by megakaryocytes in the bone marrow. This condition, which currently affects 325 members of the DiseaseMaps.org community, often leads to an increased risk of blood clots (thrombosis) or, conversely, bleeding complications. Understanding that Essential Thrombocythemia is a lifelong condition helps patients and caregivers better navigate long-term management strategies.



How is Essential Thrombocythemia diagnosed and managed?


Diagnosis typically involves a combination of complete blood counts (CBC), bone marrow biopsies, and genetic testing for mutations such as JAK2, CALR, or MPL. Management focuses on reducing the risk of vascular events. Standard treatment protocols for Essential Thrombocythemia include:



  • Low-dose aspirin: Frequently prescribed to reduce the risk of clotting.

  • Cytoreductive therapy: Medications like Hydrea (hydroxyurea) are used to lower platelet counts in high-risk patients.

  • Symptom monitoring: Active management of fatigue, bone pain, and visual disturbances is crucial for quality of life.



What is the emotional impact of living with Essential Thrombocythemia?


Living with a diagnosis like Essential Thrombocythemia can be isolating, especially given the invisible nature of symptoms like persistent fatigue and bone pain. Many patients find that connecting with others who share the same diagnosis helps alleviate the psychological burden. With 325 individuals currently sharing their experiences on DiseaseMaps.org, peer support remains a vital component of holistic care for those managing Essential Thrombocythemia.



Next steps



  • Consult a hematologist specializing in myeloproliferative neoplasms (MPNs) to discuss your specific risk profile.

  • Monitor for new symptoms such as unexplained bruising or changes in vision and report them to your physician immediately.

  • Join the DiseaseMaps.org community to share experiences and find support from others living with Essential Thrombocythemia.



Medical disclaimer: This information is for educational purposes only and does not constitute medical advice; always consult with your healthcare provider regarding diagnosis and treatment.



References



  • NIH Genetic and Rare Diseases Information Center (GARD) - Essential Thrombocythemia

  • Orphanet (ORPHA:838) - Essential Thrombocythemia

  • OMIM (Online Mendelian Inheritance in Man) - Entry #187950

  • MPN Research Foundation - Patient Resources

Author: DiseaseMaps Editorial Team
Reviewed against authoritative medical sources (NIH GARD, Orphanet, OMIM)
Last updated: 2026-05-08
Medical disclaimer: This information does not substitute professional medical advice. Always consult your doctor before making health decisions.
Source: DiseaseMaps.org
3 answers
ICD-9-CM 238.71 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 238.71 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).

Posted Aug 11, 2017 by Steve 2685
Thrombocytosis (or thrombocythemia) is the presence of high platelet counts in the blood, and can be either primary (also termed essential and caused by a myeloproliferative disease) or reactive (also termed secondary). Although often symptomless (particularly when it is a secondary reaction), it can predispose to thrombosis in some patients. Thrombocytosis can be contrasted with thrombocytopenia, a loss of platelets in the blood.

Posted Feb 7, 2019 by James 3550

ICD9 and ICD10 codes of Essential Thrombocythemia

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World map of Essential Thrombocythemia

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Stories of Essential Thrombocythemia

ESSENTIAL THROMBOCYTHEMIA STORIES
Essential Thrombocythemia stories
With a routine blood test my life changed. I had been having severe migraine headaches and I had never had even small headaches really so my Dr. made the decision to test my blood from that to a hematologist and more blood work I was diagnosed. My bl...
Essential Thrombocythemia stories
In 2011 at the age of 42 I was diagnosed with Myeloproliferative Neoplasm (or MPN) and after a bone marrow biopsy, Essential Thrombocythemia (ET) was diagnosed. I am also JAK2+ I take a daily dosis of 1 500mg Hydrea which is an oral chemo and somet...
Essential Thrombocythemia stories
Routine blood test to check on my iron counts as I also have thalassemia minor, showed platelets at 1mil. In the process of being diagnosed in 2006, had a heart attack (after having a colonoscopy.)I had a heart cath which showed blockage in 2 arterie...
Essential Thrombocythemia stories
Last year (winter of 2015/2016) I had a virus and, at one stage, collapsed and was taken to hospital with a suspected heart attack/stroke. I had neither but my platelet level was elevated at over 600. However, the hospital ascribed to the virus and d...
Essential Thrombocythemia stories
Was having trouble with health symptoms which affected my work ethic, a job I loved, so I asked my internist to either fix me or make it so I didn’t care! My symptoms were sudden confusion, dizzyness, a phantom feathery feeling and tingling in my ...

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