I think you need to consider your age and zip code as well. I have a family member who is an insurance broker and she had to factor in age and zip code to give me quotes on insurance.
Of course, pricing will vary by zip code because healthcare providers cost different amounts in different places, so a rural area might be more expensive where there are fewer doctors who have more negotiating power versus in urban areas where there are more doctors competing.
Currently, in an urban area of NY state where I am, a basic family plan is ~$1600 and an individual plan is ~$550.
You may say "what about the deductible", but it looks to me like the deductible is effectively only a payment plan. Even if you have a chronic condition, and you know you will go through the deductible for sure, you don't gain anything by paying for a lower deductible. The deductible is nowhere near the difference between $1600 and $4000 anyway.