Walter Unger
New York and Toronto, Canada
212-249-9393, www.walterunger.com
Dr. Unger first dedicated himself exclusively to hair in 1974, and he is now considered the ultimate hair doc by industry insiders. Grafts done by less-skilled surgeons can look obviously artificial, but Dr. Unger is known for performing grafts of all sizes with artistry, at his two private practices.

Ron Shapiro
Bloomington, Minnesota
800-843-1989, www.shapiromedical.com
International patients, C.E.O.’s, and physicians (even other hair doctors) swear by Dr. Shapiro as a hairline “architect”—no abnormally low or thick hairlines here. He handles only one patient per day, but getting that T.L.C. takes planning: Patients book four months in advance.

Peter Goldman
Los Angeles
310-855-1160, www.gdderm.com
In practice for more than 25 years, Dr. Goldman caters to Hollywood agents and their A-list clients, as well as the occasional Los Angeles-area billionaire. To accommodate the biggest names in this high-profile crowd, he offers lunchtime and after-hours appointments. 

William Rassman
Los Angeles, San Jose, and Newport Beach, California
800-NEW-HAIR, www.newhair.com
Dr. Rassman founded the New Hair Institute, in Los Angeles, where he pioneered follicular unit transplantation, the procedure that is the current benchmark for hair transplants. His patients include heads of state, retired billionaires, and high-level executives.

Dowling Stough
Hot Springs, Arkansas, and Dallas
501-620-4449
Patients come to Hot Springs, Arkansas, from places such as Saudi Arabia and Paris to see Dr. Stough, the son of renowned hair-transplant doctor Blufford Stough. Dr. Stough’s predominantly male patients are white-collar professionals: doctors, lawyers, dentists, and businesspeople.

Neil Sadick
New York and Great Neck, New York
212-772-7242, www.sadickdermatology.com
Dr. Sadick helped Merck develop Propecia, and his Park Avenue practice is the first stop for many Wall Streeters and Hollywood directors. Procedures offered include follicular unit transplantation ($6,000 to $12,000 for 1,500 to 3,000 hairs) and light-emitting diode treatment ($150 to $200 per sitting).

Bob Bernstein
New York and Fort Lee, New Jersey
866-576-2400, www.bernsteinmedical.com
Dr. Bernstein has a reputation as a detail-oriented perfectionist who closely monitors issues such as donor-area scarring on the scalp. This, combined with a pleasant bedside manner, makes for strong word of mouth among his executive patients.