diff --git a/cg/models/orders/constants.py b/cg/models/orders/constants.py
index 42ab938df4..aacec8e9e5 100644
--- a/cg/models/orders/constants.py
+++ b/cg/models/orders/constants.py
@@ -26,6 +26,7 @@ class ExcelSampleAliases(StrEnum):
     COLLECTION_DATE = "UDF/Collection Date"
     COMMENT = "UDF/Comment"
     CONCENTRATION = "UDF/Concentration (nM)"
+    CONCENTRATION_NG_UL = "UDF/Concentration (ng/ul)"
     CONCENTRATION_SAMPLE = "UDF/Sample Conc."
     CONTAINER = "Container/Type"
     CONTAINER_NAME = "Container/Name"
diff --git a/cg/models/orders/excel_sample.py b/cg/models/orders/excel_sample.py
index bdc293f4e2..7e6a2dac7c 100644
--- a/cg/models/orders/excel_sample.py
+++ b/cg/models/orders/excel_sample.py
@@ -29,6 +29,7 @@ class ExcelSample(OrderSample):
     concentration: Annotated[str, AfterValidator(numeric_value)] = Field(
         None, alias=ExcelSampleAliases.CONCENTRATION
     )
+    concentration_ng_ul: Field(alias=ExcelSampleAliases.CONCENTRATION_NG_UL)
     concentration_sample: Annotated[str, AfterValidator(numeric_value)] = Field(
         None, alias=ExcelSampleAliases.CONCENTRATION_SAMPLE
     )