Best practice to refactor if staments in C#

what's the best practice to refactor the following c# code: Can replace this with Strategy pattern?

    private int GetAccountType(int balance)
    {
        if (balance <= 5000)
        {
            return 1;
        }
        else if (balance > 5000 && balance <= 10000)
        {
            return 2;
        }
        else if (balance >= 10001)
        {
            return 3;
        }

        _logger.LogError("Invalid AccountType");
        // TO DO : Throw custom exception
        throw new Exception("Invalid Balance");
    }