Nicholas H. Mast MD, a private practice orthopedic surgeon in San Francisco, CA specializing in surgery of the hip and pelvis. Dr. Mast is board certified in orthopedic surgery and trained by some of the very best in hip surgery. In addition to completing a residency in orthopedic surgery, Dr. Mast has completed advanced postdoctoral fellowships in pelvic and acetabular trauma and reconstruction. He has done advanced training in the anterior approach for hip replacement. He has completed international fellowship training in hip preservation including periacetabular osteotomy and hip arthroscopy. Dr. Mast has built his professional career on sound clinical practice and results. His practice in the San Francisco Bay Area is one of the first in the region to offer anterior approach hip replacement. To date he is the most experienced surgeon in San Francisco with this technique. For those patients who are seeking alternatives to hip replacement, Dr. Mast is experienced in techniques of hip preservation and hip resurfacing. These techniques hold promise to delay or even prevent the need for hip replacement.Dr. Mast is an independent orthopedic surgeon in private practice in the San Francisco Bay Area. With offices in San Francisco and Northern Marin, Dr. Mast serves a large area of Northern California, Southern Oregon, and Western Nevada. Dr. Mast’s offices are regionally close to the urban attractions of San Francisco and the natural beauty of Marin County.