private async Task<BillingCodesValidationResult> BillingCodesCheck(ElectronicI9 electronicI9)
        {
            var generalParametersDisplayRules = await _displayRulesRepository.GetGeneralParametersDisplayRulesForReportOrderAsync(electronicI9.ClientId);

            var client = await _clientService.GetClientAsync(electronicI9.ClientId);
            var billingCodeWebNames = await _billingCodeRepository.GetBillingCodeWebNameAsync(electronicI9.ClientId) ?? new BillingCodeWebName();

            var allowedNumber = client.AllowedBillingCodesTextBoxNumber + client.AllowedBillingCodesDropDownNumber;

            var billingCodes = new List<BillingCodeValidationResult>
            {
                new BillingCodeValidationResult {Name = billingCodeWebNames.BillingCodeWebName1, Value = electronicI9.BillingInfo.BillingCodeNum1 },
                new BillingCodeValidationResult {Name = billingCodeWebNames.BillingCodeWebName2, Value = electronicI9.BillingInfo.BillingCodeNum2 },
                new BillingCodeValidationResult {Name = billingCodeWebNames.BillingCodeWebName3, Value = electronicI9.BillingInfo.BillingCodeNum3 },
                new BillingCodeValidationResult {Name = billingCodeWebNames.BillingCodeWebName4, Value = electronicI9.BillingInfo.BillingCodeNum4 },
                new BillingCodeValidationResult {Name = billingCodeWebNames.BillingCodeWebName5, Value = electronicI9.BillingInfo.BillingCodeNum5 },
                new BillingCodeValidationResult {Name = billingCodeWebNames.BillingCodeWebName6, Value = electronicI9.BillingInfo.BillingCodeNum6 },
                new BillingCodeValidationResult {Name = billingCodeWebNames.BillingCodeWebName7, Value = electronicI9.BillingInfo.BillingCodeNum7 }
            };

            var billingCodeChecked = new bool[billingCodes.Count];

            for (int i = 1; i <= client.AllowedBillingCodesDropDownNumber; i++)
            {
                var billingCodesGroup = await _billingCodeRepository.GetBillingCodesAsync(client.ClientId, i);
                var billingCodeValues = billingCodesGroup.Select(b => b.BillingCodeName);

                if (!billingCodeValues.Contains(billingCodes[i - 1].Value))
                {
                    billingCodeChecked[i - 1] = true;
                }
            }

            var firstBillingCodeInput = billingCodes[client.AllowedBillingCodesDropDownNumber];

            firstBillingCodeInput.Is6NumCheckValid = !(generalParametersDisplayRules.IsBillingCode6Num && !Regex.IsMatch(firstBillingCodeInput.Value, "^(\\d{6})$"));
            firstBillingCodeInput.Is8NumCheckValid = !(generalParametersDisplayRules.IsBillingCode8Num && !Regex.IsMatch(firstBillingCodeInput.Value, "^(\\d{4}\\-\\d{4})$"));

            var billingCodeRequiredAllCheck = true;

            if (generalParametersDisplayRules.IsBillingCodeRequiredAll)
            {
                for (int i = 0; i < billingCodes.Count && i < allowedNumber; i++)
                {
                    if (string.IsNullOrEmpty(billingCodes[i].Value))
                    {
                        billingCodeRequiredAllCheck = false;
                    }
                }
            }

            var billingCodesRequiredList = new[]
            {
                generalParametersDisplayRules.IsBillingCode1Required,
                generalParametersDisplayRules.IsBillingCode2Required,
                generalParametersDisplayRules.IsBillingCode3Required,
                generalParametersDisplayRules.IsBillingCode4Required,
                generalParametersDisplayRules.IsBillingCode5Required,
                generalParametersDisplayRules.IsBillingCode6Required,
                generalParametersDisplayRules.IsBillingCode7Required
            };

            for (int i = 0; i < billingCodesRequiredList.Length; i++)
            {
                var currentNumber = i + 1;
                billingCodes[i].IsRequiredCheckValid = !(billingCodesRequiredList[i]
                                                         && allowedNumber >= currentNumber
                                                         && string.IsNullOrEmpty(billingCodes[i].Value))
                                                         && !billingCodeChecked[i];

                billingCodes[i].IsNumericCheckValid = !(generalParametersDisplayRules.IsBillingCodeNumeric
                                                      && allowedNumber >= currentNumber
                                                      && this.IsNotNumeric(electronicI9.BillingInfo.BillingCodeNum1));
            }

            return new BillingCodesValidationResult
            {
                IsRequiredAllCheckValid = billingCodeRequiredAllCheck,
                BillingCodes = billingCodes
            };
        }