ICD-10 Code D69.0 representing "Allergic purpura" can be backward-mapped to its ICD-9 equivalent 287.0: "Allergic purpura". This is a direct match with no additional mapping qualifiers. The absence of a flag generally means the mapping is considered exact or precise. In other words, the ICD-10 code maps cleanly to the ICD-9 code without qualification, approximation, or needing multiple codes. This conversion was generated using the latest General Equivalence Mappings (GEMs). While these mappings provide a standardized reference, not all ICD-10 codes have an exact ICD-9 match. Review the table below carefully and consider the clinical context when interpreting the mapped codes.
ICD‑10 Code
Allergic purpura
ICD‑9 Code
Allergic purpura
– This is a direct match with no additional mapping qualifiers.
ICD‑10 Code
Qualitative platelet defects
ICD‑9 Code
Thrombocytopathy
– This is a direct match with no additional mapping qualifiers.
ICD‑10 Code
Other nonthrombocytopenic purpura
– This is a direct match with no additional mapping qualifiers.
ICD‑10 Code
Immune thrombocytopenic purpura
ICD‑9 Code
Immune thrombocyt purpra
Approximate Flag – This ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option and may not fully capture the original diagnosis.
ICD‑10 Code
Immune thrombocytopenic purpura
ICD‑9 Code
Prim thrombocytopen NEC
Approximate Flag – This ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option and may not fully capture the original diagnosis.
ICD‑10 Code
Evans syndrome
ICD‑9 Code
Evans' syndrome
– This is a direct match with no additional mapping qualifiers.
ICD‑10 Code
Congenital and hereditary thrombocytopenia purpura
ICD‑9 Code
Cong/herid thromb purpra
– This is a direct match with no additional mapping qualifiers.
ICD‑10 Code
Other primary thrombocytopenia
ICD‑9 Code
Prim thrombocytopen NOS
Approximate Flag – This ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option and may not fully capture the original diagnosis.
ICD‑10 Code
Other primary thrombocytopenia
ICD‑9 Code
Prim thrombocytopen NEC
Approximate Flag – This ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option and may not fully capture the original diagnosis.
ICD‑10 Code
Posttransfusion purpura
ICD‑9 Code
Posttransfusion purpura
– This is a direct match with no additional mapping qualifiers.
ICD‑10 Code
Other secondary thrombocytopenia
ICD‑9 Code
Sec thrombocytpenia NEC
– This is a direct match with no additional mapping qualifiers.
ICD‑10 Code
Thrombocytopenia, unspecified
ICD‑9 Code
Thrombocytopenia NOS
– This is a direct match with no additional mapping qualifiers.
ICD‑10 Code
Other specified hemorrhagic conditions
ICD‑9 Code
Hemorrhagic cond NEC
– This is a direct match with no additional mapping qualifiers.
ICD‑10 Code
Hemorrhagic condition, unspecified
ICD‑9 Code
Hemorrhagic cond NOS
– This is a direct match with no additional mapping qualifiers.
The General Equivalence Mappings tool is a standardized crossover resource developed by the Centers for Medicare & Medicaid Services (CMS) and the National Center for Health Statistics (NCHS). It was created to help healthcare providers, coders, payers, and software vendors accurately transition between ICD-9 and ICD-10 diagnosis codes.
This ICD-10 to ICD-9 crosswalk tool supports both forward and backward mapping, making it valuable for converting legacy data, conducting audits, updating medical coding systems, and ensuring compliance with ICD-10 standards. GEMs are especially helpful when analyzing historical claims, aligning reimbursement logic, or migrating between systems.
Because not all ICD codes have a direct match, users should interpret each mapping carefully. Some ICD-10 to ICD-9 conversions may require clinical judgment or additional documentation to ensure coding accuracy.
Not all ICD-10 to ICD-9 code conversions result in a single, exact match. In some cases, an ICD-10 code may map to multiple ICD-9 codes, especially when the original diagnosis requires more than one code to fully capture its meaning in the older coding system.
