In the US:Dr. Mahboubian at Height Lengthening in Burbank, CA -
https://www.heightlengthening.com/costs-expenses/ (Be aware they charge up to $35k for nail removal which is bonkers IMO)
Dr. Debiparshard at LimbPlastX in Las Vegas, NV -
https://www.limbplastx.com/stature-lengthening-treatments (One of the cheapest overall for Precice Max + nail removal)
Dr. Assayag at HeightRX in Baltime, MD -
https://www.heightrx.com/limb-lengthening/ (Also very cost-effective, lists femurs for only $69k but I don't know if this is PMax or P2.2)
Dr. Paley at the Paley Institute in Miami, FL -
https://limblengthening.org/lengthening-options/ (Allegedly the best of the best, but very VERY expensive as well)
Dr. Rozbruch at the Hospital for Special Surgeries in New York City, New York - Can't find a web site, and only rumors that he charges around $80-100k, which is on par.
Not US:Dr. Donghoon Lee in Seoul, South Korea - no official site that I can find, but apparently charges around $72k? Renowned as a good surgeon.
Dr. Giotikas in Athen, Greece -
https://www.athensbjr.com/cost-pricing-of-cosmetic-limb-lengthening/ (Does a wide variety of methods and does Precice 2.2 for like $50k USD, has been controversial recently due to allegations of a case or two of bone non-unions and even a patient dying, although it is unclear whether these have been proven or whether they were direct result of the doctor's negligence or something done on the patients' parts).
I'm personally looking at LimbPlastX for Precice Max on femurs. I
was looking at Dr. Giotikas before, but got spooked by the rumors (although he's probably still a fine doctor, and probably a thousand percent better than most options in other countries like Turkey, India, etc.)
[EDITED because I keep misspelling these crazy names]