ICD-10 Code R78.0 representing "Finding of alcohol in blood" can be backward-mapped to its ICD-9 equivalent 790.3: "Excess blood-alcohol lev". 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
Finding of alcohol in blood
ICD‑9 Code
Excess blood-alcohol lev
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
Finding of opiate drug in blood
ICD‑9 Code
Oth nspcf finding blood
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
Finding of cocaine in blood
ICD‑9 Code
Oth nspcf finding blood
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
Finding of hallucinogen in blood
ICD‑9 Code
Oth nspcf finding blood
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
Finding of other drugs of addictive potential in blood
ICD‑9 Code
Oth nspcf finding blood
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
Finding of other psychotropic drug in blood
ICD‑9 Code
Oth nspcf finding blood
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
Finding of steroid agent in blood
ICD‑9 Code
Oth nspcf finding blood
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
Abnormal lead level in blood
ICD‑9 Code
Abn blood chemistry 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
Finding of abnormal level of heavy metals in blood
ICD‑9 Code
Abn blood chemistry 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‑9 Code
Bacteremia of newborn
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.
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
Finding of oth substances, not normally found in blood
ICD‑9 Code
Abn blood chemistry 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
Finding of oth substances, not normally found in blood
ICD‑9 Code
Oth nspcf finding blood
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
Finding of unsp substance, not normally found in blood
ICD‑9 Code
Oth nspcf finding blood
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.
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.
