You and I must be reading this very differently.
Primary care visits are free. Not just preventative, but any time you see your PCP you pay $0.
All labs are likewise free.
$0 for 3 month if you mail order tier 1 which covers most of the drugs I common use in that age group - allopurinol, metformin, pretty much every ACE/ARB, toprol/coreg, amlodipine, HCTZ, crestor/zocor/pravachol, zantac, protonix, synthroid, fosamax.
Pretty much every other generic is going to run them also $0/month if done with mail order.
Specialist copay is $40, which isn't $0 but its not too bad either.
Outpatient surgery maxes out at $300.
Outpatient obs (which as you're well aware is becoming more and more common) maxes out at $300 as well.
Also, this plan has a yearly out of pocket max of just over 6k. Regular part B does not have an out of pocket max.