What do you mean by "results doctors by themselves can achieve"? Do you just mean to exclude drugs?
Or are you somehow also excluding IVF, MRIs, CTs, LASIK, stents, DNA sequencing, laparoscopic surgery, newborn screening, liposuction, and transplants?
That's right. New procedures are part of what professionals do, and knowing which one to apply each time is their trade. You can't buy that in a bottle.
(1970) Cost of proffesional services: $19.8 Prescription drugs: $5.5
(2013) Cost of proffesional services: $777.9 Prescription drugs: $271.1
% change: Cost of proffesional services: 3928% Prescription drugs: 4929%
The drugs increased in cost a lot more than proffesional services.
[1] https://www.cdc.gov/nchs/data/hus/hus14.pdf#103