Dr. William C. McMaster, MD

Dr. McMaster practices at UCI Health - Orange in Orange, California, part of UC Irvine.

Dr. McMaster's NPI, 1336175058, was assigned on June 24, 2006. Dr. McMaster graduated from Cleveland Medical College, Homeopathic in 1966. Dr. McMaster holds California license G20323.

Dr. McMaster's primary practice is UCI Health - Orange, at 101 City Drive South, Orange, CA 92868 in Orange County. The practice phone is (714) 456-7890.

Dr. McMaster's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. The medical group on file is UCI Health Orthopaedic Surgery Services.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMaster practices. Vendor and product names are available with a free account.

Orthopaedic surgery is Dr. McMaster's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. McMaster is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. Dmand AI has Dr. McMaster's licenses on file in 4 states: California, Ohio, Illinois and South Carolina.

Dmand AI lists arthritis, hip replacement, joint pain, knee replacement, lower back pain, repeat hip or knee replacement surgery and thoracic spine disorders among the conditions Dr. McMaster treats.

CMS data shows 65 Medicare services from Dr. McMaster across 3 procedure codes in 2024, all of them office visits, for 59 Medicare patients. Medicare paid $4,184 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 59 Medicare patients who saw Dr. McMaster in 2024. The largest group is 75 to 84, with 22 patients. 75% of them have arthritis, and 75% have high cholesterol. 54% are also on Medicaid. Their average risk score is 1.34, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. McMaster's median patient age at 67, with 63% women.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. McMaster for performance year 2024, reported through an alternative payment model (APM). Dr. McMaster accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Hip replacement: 1 to 10 procedures (CMS shows small counts as a range)

Knee replacement: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 38 papers to Dr. McMaster, published from 2009 to 2025. The most frequent topics are Shoulder Joint, Methods and Postoperative Complications. Dr. McMaster has published most often in Am J Sports Med. Dr. McMaster's most frequent co-authors are Carlos A. Prietto, MD, Wesley Merrill Nottage, MD and Edward Abraham, MD.

CMS Open Payments shows 34 general payments to Dr. McMaster from 9 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 43% of the total. Pacira Pharmaceuticals Incorporated paid the most, $1,661.

Dmand AI lists 5 awards for Dr. McMaster, most recently President in 2009.

Dr. McMaster graduated from Cleveland Medical College, Homeopathic in 1966. Dr. McMaster is a member of ACS.

Dr. McMaster is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.