Not necessarily. Different life insurance companies have different underwriting standards for acceptance, so another life insurance company might insure someone with your health issues.
So you want to apply for life insurance with a different company, or try going through a life insurance broker that specializes in placing high risk life insurance, the broker might know more about which life insurance companies might be the best match for your individual health problems.
Also, it's a good idea to check with your employer. Some employers offer life insurance coverage (say $25,000 or $50,000) to their employees without requiring employees to answer health questions.
Have you been turned down for life insurance?