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ICD-9 272.4 Conversion to ICD-10 E78.4

ICD-9 to ICD-10 Crossover Result

ICD-9 Code 272.4 representing "Hyperlipidemia NEC/NOS" has been updated to its ICD-10 equivalent E78.4: "Other hyperlipidemia". This crossover conversion was done using the latest General Equivalence Mappings (GEMs).

ICD‑9 Code

272.4

Hyperlipidemia NEC/NOS

ICD‑10 Code

E78.4

Other hyperlipidemia

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‑9 Code

272.4

Hyperlipidemia NEC/NOS

ICD‑10 Code

E78.5

Hyperlipidemia, unspecified

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.

About the General Equivalence Mappings Crossover Tool

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-9 to ICD-10 code conversions have a one-to-one match. In many cases, a single ICD-9 code maps to multiple ICD-10 codes because ICD-10 provides greater detail and specificity. Coders must review the clinical documentation to select the most accurate ICD-10 code from the available options.