Willis Chang, M.D.
Emergency Medicine Physician · Las Vegas, NV
Willis Chang, M.D. is an emergency medicine physician with a practice address in Las Vegas, Nevada, and NPI 1609253103, issued on May 4, 2015. Check the license (Nevada 17812, as entered in NPPES) on the Nevada State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Willis Chang
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 17812 NV
Self-reported in NPPES; status is on the state search - Practice location
- 3186 S Maryland Pkwy, Las Vegas, NV 89109
- Phone
- (702) 961-7800
- Enumerated
- May 4, 2015
- Record last updated
- Jul 20, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180801002535); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 2015
- 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.
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- 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 Willis Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNevada State Board of Medical Examiners
Search for license 17812Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average emergency medicine physician in 2024
130 Medicare Part D claims for 91 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Ondansetron Odt14 claims
- Ibuprofen13 claims
- Cephalexin11 claims
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.
The MIPS final score for 2023 (Medicare payment program): 88.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Fremont Emergency Services Scherr LtdLas Vegas, NV
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Willis Chang among 575 emergency medicine physician records in Nevada
Willis Chang, M.D. 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 2015, is newer than 62% of them.
- NPI issued2015 · 62% of these records are older, 34% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2015 · median 2014 among the 366 with a school on file
- Record last updated2018 · 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
- 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
- Jared MartinLas Vegas, NV 891091649569583
Common questions
What is Willis Chang, M.D.'s NPI number?
Willis Chang, M.D.'s National Provider Identifier (NPI) is 1609253103, issued on May 4, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Willis Chang, M.D. located?
The NPPES record lists a practice address at 3186 S Maryland Pkwy, Las Vegas, NV, 89109. Phone: (702) 961-7800. Providers update this record themselves, so call before visiting.
How can I verify Willis Chang, M.D.'s license?
NPPES lists Nevada license number 17812, 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 Willis Chang, M.D. prescribe under Medicare Part D?
In 2024, Willis Chang, M.D. had 130 Medicare Part D claims for 91 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Willis Chang, M.D.'s MIPS final score?
The 2023 MIPS final score is 88.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.