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WILLIAM S MUIR M.D.
NPI 1912920604
Orthopaedic Surgery - Orthopaedic Surgery of the Spine in Las Vegas, NV

Active since July 25, 2006PECOS EnrolledAccepts Medicare AssignmentCLIA 29D2258937 · Waiver
653 N TOWN CENTER DR, 210, LAS VEGAS, NV 89144(702) 254-3020(702) 255-2620 Get Directions Write a Review

NPPES record last updated: August 28, 2009. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About William S Muir M.d. NPPES

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

WILLIAM S MUIR M.D. (NPI 1912920604) is an individual orthopaedic surgery of the spine provider in Las Vegas, Nevada, licensed in Nevada (11685) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through April 27, 2028, and is a graduate of University Of Nevada School Of Medicine (1986).

NPPES Registry Identity

NPI1912920604
Entity TypeIndividualMale
Primary Taxonomy207XS0117X
Provider Legal NameWILLIAM S MUIRCredential: M.D.
Location Address653 N TOWN CENTER DR, 210Las Vegas, NV 89144-0514
Mailing Address653 N Town Center Dr, 210Las Vegas, NV 89144-0514 · (702) 254-3020 · Fax (702) 255-2620
Phone(702) 254-3020
Fax(702) 255-2620
Sole ProprietorYes
Medical School CMSUniversity Of Nevada School Of MedicineGraduated 1986
Enumeration DateJuly 25, 2006
Last NPPES UpdateAugust 28, 2009
✔ NPI 1912920604 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic Surgery · Orthopaedic Surgery of the SpineAllopathic & Osteopathic Physicians
Taxonomy Code207XS0117X
License✔ Licensed in NV · 11685
Definition
Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, orthopaedic surgeons of the spine deal with the evaluation and nonoperative and operative treatment of the full spectrum of primary spinal disorders including trauma, degenerative, deformity, tumor, and reconstructive.
653 N TOWN CENTER DR, Las Vegas, NV 89144
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Other Identifiers 3

Medicare UPINF09626NV
Medicaid002084150NV
Medicare PINV104258NV

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William S Muir 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 ID2466417696
PECOS Enrollment IDI20051221000359
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.

Medicare Billing Reassignment

Medicare enrollment records show William Muir reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

William S Muir MD Ltd
0.1 mi
Orthopaedic Surgery of the Spine
653 N TOWN CENTER DR, SUITE 210
Las Vegas, NV 89144
  • Reassigned Medicare billing, Nevada enrollment
  • 4 clinicians in this Medicare group
NPI 1255658019 (702) 254-3020

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 29D2258937

William S Muir MD · Henderson, NV
Active · expires Apr 27, 2028
CLIA Number29D2258937
Laboratory TypePhysician Office
Certificate Effective DateApril 28, 2026
Certificate Expiration DateApril 27, 2028
Laboratory DirectorWilliam S. Muir
Laboratory Phone(702) 254-3020
Laboratory LocationWilliam S Muir MD1399 Galleria Drive #100, Henderson, NV 89014
CLIA data matches this NPI record on: Phone
This certificate is issued to a laboratory to perform only waived tests.

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.

EARL PLASTIC SURGERY, P.C.
Plastic Surgery
653 N TOWN CENTER DR, SUITE 108
LAS VEGAS, NV 89144
Clark County (702) 939-3436
DR. JOSHUA MACON M.D.
Anesthesiology
653 N TOWN CENTER DR, SUITE 402
LAS VEGAS, NV 89144
Clark County (702) 562-3039
TRESA CHAKKALAKKAL MD
Pediatrics
653 N TOWN CENTER DR, SUITE 106
LAS VEGAS, NV 89144
Clark County (702) 363-3000
KAREN DALLEY MD LTD
Obstetrics & Gynecology
653 N TOWN CENTER DR, SUITE 514
LAS VEGAS, NV 89144
Clark County (702) 869-0070
JAMES WILLIAM ZELUFF M.D.
Obstetrics & Gynecology (Gynecology)
653 N TOWN CENTER DR, SUITE 214
LAS VEGAS, NV 89144
Clark County (702) 255-2022
DEB K. MUKHOPADHYAY M.D.
Internal Medicine (Gastroenterology)
653 N TOWN CENTER DR, SUITE #604
LAS VEGAS, NV 89144
Clark County (702) 233-0666
DR. FRANK ROBERT GIOIA MD
Pediatrics (Pediatric Critical Care Medicine)
653 N TOWN CENTER DR, STE 408
LAS VEGAS, NV 89144
Clark County (702) 395-7095
PAUL SCHWINGLER
Physical Medicine & Rehabilitation
653 N TOWN CENTER DR
LAS VEGAS, NV 89144
Clark County (702) 254-3020

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 Muir's NPI number?

The NPI number for William Muir is 1912920604. It was assigned to this individual provider in the NPPES registry on July 25, 2006.

Where is William Muir located?

William Muir practices at 653 N Town Center Dr 210, Las Vegas, NV 89144. The listed phone number is (702) 254-3020.

What is William Muir's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Orthopaedic Surgery of the Spine, with taxonomy code 207XS0117X.

Is William Muir enrolled in Medicare?

Yes. William Muir 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.

Which organization bills Medicare for William Muir's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Muir reassigns Medicare benefits to William S Muir MD Ltd (Las Vegas, NV). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Muir's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Does William Muir hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 29D2258937) is associated with this NPI, valid through April 27, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for William Muir was last updated on August 28, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years 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.