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DR. WILLIAM C MCMASTER M.D.
NPI 1336175058
Orthopaedic Surgery in Orange, CA

Active since June 24, 2006PECOS EnrolledAccepts Medicare Assignment
1310 W STEWART DR, SUITE 508, ORANGE, CA 92868(714) 633-2111(714) 633-5615 Get Directions Write a Review

NPPES record last updated: March 3, 2025. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About Dr. William C Mcmaster M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM C MCMASTER M.D. (NPI 1336175058) is an individual orthopaedic surgery provider in Orange, California, licensed in California (G20323) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University (1966).

NPPES Registry Identity

NPI1336175058
Entity TypeIndividualMale
Primary Taxonomy207X00000X
Provider Legal NameDR. WILLIAM C MCMASTERCredential: M.D.
Location Address1310 W STEWART DR, SUITE 508Orange, CA 92868-3854
Mailing Address1310 W Stewart Dr, Suite 508Orange, CA 92868-3854 · (714) 633-2111
Phone(714) 633-2111
Fax(714) 633-5615
Sole ProprietorNo
Medical School CMSClvlnd Clinic Lerner College Of Med Of Case Wstn Rsv UniversityGraduated 1966
Enumeration DateJune 24, 2006
Last NPPES UpdateMarch 3, 2025
NPPES CertifiedMarch 3, 2025
✔ NPI 1336175058 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
License✔ Licensed in CA · G20323
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
Also ListedSpecialistTaxonomy 174400000X
1310 W STEWART DR, Orange, CA 92868
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William C Mcmaster M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7315973781
PECOS Enrollment IDI20120224000148
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
24 services23 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
23 services23 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
18 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92868 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

AYAZ BIVIJI M.D.
Specialist
1310 W STEWART DR, SUITE 510
ORANGE, CA 92868
Orange County (714) 538-8549
KEITH MITCHELL WEINER M.D.
Pediatrics (Pediatric Cardiology)
1310 W STEWART DR, SUITE 407
ORANGE, CA 92868
Orange County (714) 538-8887
MS. SARAH ANNE BRENDEN MARRIAGE AND FAMILY
Marriage & Family Therapist
1310 W STEWART DR
ORANGE, CA 92868
Orange County (714) 771-1404
MARTIN JERRY FELDMAN M.D.
Obstetrics & Gynecology
1310 W STEWART DR, SUITE 606
ORANGE, CA 92868
Orange County (714) 997-9494
JOHN ANTHONY SCHLECHTER D.O.
Orthopaedic Surgery (Pediatric Orthopaedic Surgery)
1310 W STEWART DR, SUITE 508
ORANGE, CA 92868
Orange County (714) 633-2111
PLASTIC SURGERY ASSOCIATES OF ORANGE COUNTY
Clinic/Center (Ambulatory Surgical)
1310 W STEWART DR, STE. 610
ORANGE, CA 92868
Orange County (714) 997-4300
MR. DENNIS MOORE CAMERON MFT
Marriage & Family Therapist
1310 W STEWART DR, SUITE 301
ORANGE, CA 92868
Orange County (949) 497-1618
GUICHET & GUICHET, DDS, INC.
Dentist (Prosthodontics)
1310 W STEWART DR, SUITE 202
ORANGE, CA 92868
Orange County (714) 771-7555

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Mcmaster's NPI number?

The NPI number for William Mcmaster is 1336175058. It was assigned to this individual provider in the NPPES registry on June 24, 2006.

Where is William Mcmaster located?

William Mcmaster practices at 1310 W Stewart Dr Suite 508, Orange, CA 92868. The listed phone number is (714) 633-2111.

What is William Mcmaster's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is William Mcmaster enrolled in Medicare?

Yes. William Mcmaster is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for William Mcmaster was last updated on March 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.