Duncan James Williams, DO
Emergency Medicine Physician · Las Vegas, NV
Duncan James Williams, DO is an emergency medicine physician with a practice address in Las Vegas, Nevada, and NPI 1225730781, issued on Mar 20, 2023. Check the license (Nevada DO4122, as entered in NPPES) on the Nevada State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Duncan James Williams
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- DO4122 NV
012254 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 3186 S Maryland Pkwy, Las Vegas, NV 89109
- Phone
- (702) 961-5000
- Enumerated
- Mar 20, 2023
- Record last updated
- Jul 16, 2026
- Medicare enrollment
- Enrolled (PECOS I20260515002953); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 575 in Nevada → Look up another NPI →
Also registered at 3186 S Maryland Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arash Albekord, M.D.Emergency Medicine Physician1023391026
- Kevin Alford, M.D.Diagnostic Radiology Physician1407242985
- Abdulla M Shereef Ali, MDNeurocritical Care Physician1396307724
- Mohammed AlnaherInternal Medicine Physician1396468344
- Oscar Alonso Oduardo, APRNNurse Practitioner1831775071
- Umar Ansari, DOStudent in an Organized Health Care Education/Training Program1306309216
Verify Duncan James Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNevada State Board of Medical Examiners
Search for license DO4122Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average emergency medicine physician in 2024
52 Medicare Part D claims for 38 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Duncan James Williams among 575 emergency medicine physician records in Nevada
Duncan James Williams, DO is one of 575 emergency medicine physician records with a practice address in Nevada. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 97% of them.
- NPI issued2023 · 97% of these records are older, under 1% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2023 · median 2014 among the 366 with a school on file
- Record last updated2026 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Nevada practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Nevada
There are 575 emergency medicine physician records in Nevada.
All 575 in Nevada → Every provider in Las Vegas → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Arash Albekord, M.D.Las Vegas, NV 891091023391026
- Willis Chang, M.D.Las Vegas, NV 891091609253103
- Christopher Cheng, M.D.Las Vegas, NV 891091508946427
- Katherine Januszewicz, MDLas Vegas, NV 891091255795290
- John Jobes, DOLas Vegas, NV 891091073992079
- Charles Lin, M.D.Las Vegas, NV 891091194131854
- Mark Macedo, D.O.Las Vegas, NV 891091114286077
- Roya Mahana, D.O.Las Vegas, NV 891091033573589
Common questions
What is Duncan James Williams, DO's NPI number?
Duncan James Williams, DO's National Provider Identifier (NPI) is 1225730781, issued on Mar 20, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Duncan James Williams, DO located?
The NPPES record lists a practice address at 3186 S Maryland Pkwy, Las Vegas, NV, 89109. Phone: (702) 961-5000. Providers update this record themselves, so call before visiting.
How can I verify Duncan James Williams, DO's license?
NPPES lists Nevada license number DO4122, as entered by the provider. Search the Nevada State Board of Medical Examiners at https://medboard.nv.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Duncan James Williams, DO prescribe under Medicare Part D?
In 2024, Duncan James Williams, DO had 52 Medicare Part D claims for 38 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.