William C. McMaster, M.D.
Orthopaedic Surgery Physician · Orange, CA
William C. McMaster, M.D. is an orthopaedic surgery physician with a practice address in Orange, California, and NPI 1336175058, issued on Jun 24, 2006. Check the license (California G20323, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William C. McMaster
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- G20323 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1310 W Stewart Dr, Orange, CA 92868
- Phone
- (714) 633-2111
- Enumerated
- Jun 24, 2006
- Record last updated
- Mar 3, 2025
- Fax
- (714) 633-5615
- Medicare enrollment
- Enrolled (PECOS I20120224000148); accepts Medicare assignment
- Medical or professional school
- Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University, 1966
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Also registered at 1310 W Stewart Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jane Abdelhadi, M.D.Internal Medicine Physician1124097100
- Allan Akerman, M.D.Obstetrics & Gynecology Physician1396714184
- Quincy Almond, M.D.Hospitalist Physician1578573697
- Afshin Aminian, M.D.Specialist1609805910
- Lars Anker, MDNeurological Surgery Physician1962548537
- Shawn Beck, M.D.Urology Physician1669661849
Verify William C. McMaster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G20323Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $175.02
1 payment: food and beverage; the largest payer was Davol Inc. The 15,003 providers of this specialty with any payment received $23,022.89 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Regents OF The University OF CaliforniaOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William C. McMaster among 2,276 orthopaedic surgery physician records in California
William C. McMaster, M.D. is one of 2,276 orthopaedic surgery physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 46% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1966 · median 2003 among the 1,347 with a school on file
- Record last updated2025 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in California
There are 2,276 orthopaedic surgery physician records in California.
All 2,276 in California → Every provider in Orange → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Steven Barnett, MDOrange, CA 928681750378030
- Lawrence Barnett, MDOrange, CA 928681386631406
- Paul Beck, MDOrange, CA 928681356322879
- Peter Birnbaum, D.O. INC.Orange, CA 928681538267042
- Michael Gillman, M.D.Orange, CA 928681275536633
- Robert Gorab, MDOrange, CA 928681326035601
- Robert Macarthur, MDOrange, CA 928681508949470
- Pablo Prietto, MDOrange, CA 928681073500351
Common questions
What is William C. McMaster, M.D.'s NPI number?
William C. McMaster, M.D.'s National Provider Identifier (NPI) is 1336175058, issued on Jun 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William C. McMaster, M.D. located?
The NPPES record lists a practice address at 1310 W Stewart Dr, Orange, CA, 92868. Phone: (714) 633-2111. Providers update this record themselves, so call before visiting.
How can I verify William C. McMaster, M.D.'s license?
NPPES lists California license number G20323, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.