diff --git a/server/validation/selfregister.go b/server/validation/selfregister.go
index b2cf5fa..ae0f431 100644
--- a/server/validation/selfregister.go
+++ b/server/validation/selfregister.go
@@ -53,7 +53,7 @@ func ValidateSelfregistration(user *viewmodel.User) []errors.ValidationError {
 
 	//Provider NPI validation
 	if len(user.Provider.InternalID) != 10 || !isNumeric(user.Provider.InternalID) {
-		result = append(result, errors.ValidationError{Field: "provider.internal_id", Message: "Provider NPI must be 10 digit number"})
+		result = append(result, errors.ValidationError{Field: "provider.internal_id", Message: "Provider NPI must be a 10 digit number"})
 	}
 
 	//First name validation