Can the VA refuse to treat a 100% service-connected veteran citing their case as "too complex," and also refuse to outsource them for care?

Do you vote? If so, Congressional Representatives will love your story, IF YOU HAVE DOCUMENTED PROOF. Send them COPIES of all your documentation.

Contact you congress person and/or senator, provide copies of everything you have I am sure you will get results.

Writing a letter to the current president will do you no good.

Go to your local DAV, American Ljegion ,VFW and asked to speak to the centers VA claims Agent. He or she will want any records medical records service records even award letters don't forget to take your DD 214.
These claims agents will be working for you they will instruct you on how to fit in all the paperwork to put in a claim for your service related injuries do not go to your States claims agent stay away from State the only person that you are interested in is in local VFW, DAV, American Legion
Brother I was 90% for 9 1/2 years once a president Trump got in the office they put a ruling in that said all claims must be answered between 4 to 6 months if they are not answered you get the claim automatically if they denied a clean and you put in a a cream yourself and you win the claim on appeal the person who denied your claim is fired and I know that happened to me I'm 100% from disabled unfortunately mine is PTSD, I HOPE this can put you on the correct Path.
REMEMBER, The More Records you provide the better chance you have for success.

I used my Congressman in Calif. and got a response in 4 days.

Missed this until recent replies popped it up on my feed.
My recommendation, if your troubles have not already been resolved, would be to change your Primary to Baltimore VAMC or Loch Raven VAMC instead of beating your head against the same rock in DC over and over again.

Yes they can if it's too complex just keep fighting!!!

You have Veterans Choice now.... They can't refuse unless it's out of state!! Then you will have a copay... Find a local Doctor that agrees with the Diag and it's related to your disability....then it should be be covered... Good luck!!

As far as the medicines from community care providers, most of their offices don't read the consult they get with instructions on how to submit a prescription. The consult has a form for the doctor to fill out and fax to the VA pharmacy.

I have a very complicated case as well but only because I stay on top of my care, things are getting done. The community care office at our local hospital is quite frankly awful. Hang in there and stay on top of it. I would also recommend DAV.