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SEAN WILLIAMS D.O.
NPI 1417488354
Emergency Medicine in Las Vegas, NV

Active since March 22, 2017PECOS EnrolledAccepts Medicare Assignment
89.55/100
CMS Quality Rating
901 RANCHO LN STE 135, LAS VEGAS, NV 89106(702) 383-7885 Get Directions Write a Review

NPPES record last updated: August 23, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 23, 2022, Jan 13, 2020, Mar 22, 2017 (3 updates tracked since 2017).

About Sean Williams D.o. NPPES

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

SEAN WILLIAMS D.O. (NPI 1417488354) is an individual emergency medicine provider in Las Vegas, Nevada, licensed in Idaho (OC-0197) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with St Luke's Regional Medical Center, and is a graduate of Other (2017).

NPPES Registry Identity

NPI1417488354
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameSEAN WILLIAMSCredential: D.O.
Location Address901 RANCHO LN STE 135Las Vegas, NV 89106-3826
Mailing Address901 Rancho Ln Ste 135Las Vegas, NV 89106-3826 · (702) 383-7885
Phone(702) 383-7885
Sole ProprietorNo
Medical School CMSOtherGraduated 2017
Enumeration DateMarch 22, 2017
Last NPPES UpdateAugust 23, 20223 updates tracked since enumeration
NPPES CertifiedAugust 23, 2022
✔ NPI 1417488354 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in ID · OC-0197✔ Licensed in NV · DO2661
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
901 RANCHO LN STE 135, Las Vegas, NV 89106
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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

Sean Williams D.o. 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 ID5597022798
PECOS Enrollment IDI20220909001822, I20220909002496
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 Reassignments

2

Medicare enrollment records show Sean Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Sound Physicians Emergency Medicine Of Nevada Bessler PLLC
340 mi
Emergency Medicine
2375 E PRATER WAY
Sparks, NV 89434
  • Reassigned Medicare billing, Nevada enrollment
  • 117 clinicians in this Medicare group
NPI 1881151231 (775) 331-7000
Cep America LLC
486 mi
Emergency Medicine
777 HOSPITAL WAY
Pocatello, ID 83201
  • Reassigned Medicare billing, Idaho and Oregon enrollments
  • Also billed through NPI 1790209898 (Oregon)
  • 81 clinicians in this Medicare group
NPI 1962257410 (208) 239-1000

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

Areas of Expertise CMS Part B claims 5

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
170 services167 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
120 services118 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
103 services102 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
61 services61 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
11 services11 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St Luke's Regional Medical Center

Acute Care Hospitals · Boise, ID
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number130006
Location190 East Bannock StreetBoise, ID 83712 · Ada County
Emergency services Birthing friendly

Saint Alphonsus Regional Medical Center

Acute Care Hospitals · Boise, ID
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number130007
Location1055 North Curtis RoadBoise, ID 83706 · Ada County
Emergency services Birthing friendly

Saint Alphonsus Medical Center - Ontario

Acute Care Hospitals · Ontario, OR
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number380052
Location351 SW 9th StreetOntario, OR 97914 · Malheur County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 89106 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
$88.51 typical visit price
range $57.07 – $173.24
Typical copayment $22.12 (range $14.26 – $43.31)
Most-billed visit code 99203
Established Patient
$100.60 typical visit price
range $18.27 – $140.96
Typical copayment $25.15 (range $4.56 – $35.24)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

89.55/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality70.45
Improvement Activities40
Cost100

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.

ALEX LIN DO
Emergency Medicine
901 RANCHO LN STE 135
LAS VEGAS, NV 89106
Clark County (702) 383-7885
DEVAN STEVENS MS OTR, PA-C
Physician Assistant
901 RANCHO LN STE 135
LAS VEGAS, NV 89106
Clark County (702) 383-1958
DANIEL DELLWO PA-C
Physician Assistant (Medical)
901 RANCHO LN STE 135
LAS VEGAS, NV 89106
Clark County (541) 250-1525
QUYNHVY TA DO
Student in an Organized Health Care Education/Training Program
901 RANCHO LN STE 135
LAS VEGAS, NV 89106
Clark County (702) 383-7885
LEO ANDRADA DO
Student in an Organized Health Care Education/Training Program
901 RANCHO LN STE 135
LAS VEGAS, NV 89106
Clark County (702) 383-7885
MAXINE YANG MD
Student in an Organized Health Care Education/Training Program
901 RANCHO LN STE 135
LAS VEGAS, NV 89106
Clark County (702) 383-7885
TRAVIS MARSHALL
Emergency Medicine
901 RANCHO LN STE 135
LAS VEGAS, NV 89106
Clark County (702) 383-7885
HERMAN LEE DO
Emergency Medicine
901 RANCHO LN STE 135
LAS VEGAS, NV 89106
Clark County (415) 307-0827

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 Sean Williams's NPI number?

The NPI number for Sean Williams is 1417488354. It was assigned to this individual provider in the NPPES registry on March 22, 2017.

Where is Sean Williams located?

Sean Williams practices at 901 Rancho Ln Ste 135, Las Vegas, NV 89106. The listed phone number is (702) 383-7885.

What is Sean Williams's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Sean Williams enrolled in Medicare?

Yes. Sean Williams 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 organizations bill Medicare for Sean Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sean Williams reassigns Medicare benefits to 2 organizations: Sound Physicians Emergency Medicine Of Nevada Bessler PLLC (Sparks, NV) and Cep America LLC (Pocatello, ID). Each 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 Sean Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Sean Williams affiliated with any hospitals?

According to CMS data, Sean Williams is affiliated with St Luke's Regional Medical Center, Saint Alphonsus Regional Medical Center and Saint Alphonsus Medical Center - Ontario.

When was this NPI record last updated?

The NPPES record for Sean Williams was last updated on August 23, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.