Doctor profile · Federal record
Dr. Willis Chang, M.D.
Emergency Medicine Physician (CMS: Emergency Medicine) · Student in an Organized Health Care Education/Training Program · Las Vegas, NV
- NPI 1609253103
- Accepts Medicare
- MIPS 78.5 / 100 · 2023
- 11 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
3186 S Maryland Pkwy
Las Vegas, NV 89109
(702) 961-7800 - Mailing address
-
7391 W Charleston Blvd Ste 140
Las Vegas, NV 891171577
Credentials & registration
- NPI registered
- May 2015 — 11 yrs on file
- Profile last updated
- July 20, 2018
- Year of graduation
- 2015 — 11 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- Nevada #17812
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1609253103. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
441
Distinct HCPCS
4
Medicare allowed
$74,745
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 226 | 221 | $175 | |
99291 |
Critical care, first 30-74 minutes | 118 | 117 | $210 | |
99284 |
Emergency department visit with moderate level of medical decision making | 73 | 72 | $120 | |
99283 |
Emergency department visit with low level of medical decision making | 24 | 21 | $72 |
In context: peer comparison
Among 104 peers in Las Vegas Emergency Medicine Physician, average services per provider: 548. This provider delivers 0.8× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
52
Patients
50
Total drug cost
$325
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Cephalexin | Generic | 25 | 24 | $199 |
| Ondansetron Odt (Ondansetron) | Brand | 14 | 13 | $88 |
| Ibuprofen | Generic | 13 | 13 | $39 |
Frequently asked questions
What is Dr. Willis Chang's medical specialty?
Dr. Willis Chang practices Emergency Medicine Physician in Las Vegas, NV.
Where does Dr. Willis Chang practice?
Dr. Willis Chang practices at 3186 S Maryland Pkwy, Las Vegas, NV 89109. Office phone: 7029617800.
What is Dr. Willis Chang's NPI?
Dr. Willis Chang's National Provider Identifier (NPI) is 1609253103, issued by NPPES.
Does Dr. Willis Chang accept Medicare assignment?
Yes. Dr. Willis Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Willis Chang commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Critical care (HCPCS 99291); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.