In order to get a plan for pre existing condition insurance, you have to be without health insurance for 6 months.
If you want something that is not a major medical insurance, but an interim coverage during that period there are companies that offer X amounts of visits with no deductable and if you need Hospital they pay a percentage of the bill. The ER Deductable is $100.
I personally had to take that type insurance for 6 months due to pre existing conditions and could not get a regular coverage. Once I have had this for 6 months I can apply for a different policy.
There are a couple of Companies that offer this minor type covereage: Defined Health One Multi Plan is one. It is directed by American Medical and Life Insurance Company 1-800-290-3869 or you can check out USA Select Choice owned by Beech Street 1-877-693-9091.
The price on these plans run in the $200-$300 range a month charged to your bank checking account or a credit card. This is the cheapest way to have some type of coverage for minor issue you may encounter.
The pre existing coverage is through the government and is a PPO, but has a deductable that is rather high. Once you are off regular insurance for 6 months you can apply for a different policy for pre existing conditions in this link: https://www.pcip.gov/
In order to get the PCIP, you will need to get a decline letter from an Insurace company due to your Medical condition. Once that is done you can get done you should be eligible get the PCIP insurance.
Please let me know if you need further information.