ICD-9 Code 238.71 - Essential thrombocythemia

ICD-9-CM Diagnosis Code 238.71

Diagnosis Code: 238.71 (Raw: 23871)

Description: Essential thrombocythemia

Classification: International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM)

Fiscal Year: 2026 Reference

CMS Section 111 Status: Valid for reporting.

Overview & Historical Usage

ICD-9-CM code 238.71 is designated for Essential thrombocythemia. While superseded by ICD-10 for current healthcare encounters, it remains a recognized reference code for CMS Section 111 reporting, legacy claims adjudication, and historical clinical data analysis.