Since he shared it in the documentary and on Reddit, I recorded it for reference at one time (to possibly also pursue), so I can share out considering it's public knowledge.
The doctor he credits for his improvement is Dr. Karen Bullington near Atlanta, Georgia from the Holtorf Medical Group - I think it used to be a part of the Fibro and Fatigue Clinics, but it is now part of Holtorf. His testimonial is listed on the website under 'Ryan P' for Dr. Bullington.
On his Reddit Q&A prior to the documentary release, he stated: "I continue to get an IV infusion monthly (with about 14 ingredients: NADH, glutathione, B12, B2, B-Complex, and many more) as well as give myself a shot weekly (glutathione, NADH, hydroxocobalamine, adenosine monophosphate). I still have to take about 15-20 pills daily."
Obviously I don't know for certain if other IV's were used during his treatment process but it appears that he credits these IV's for his improvement.