Ming Chien, M.D.
Ming Chien, M.D. is a Pediatric Emergency Medicine (Emergency Medicine) Physician in Naperville, IL, registered under NPI 1952518920. This provider registers 4 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 801 S WASHINGTON ST, Naperville, IL 60540. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 036117696 | IL | Pediatric Emergency Medicine (Emergency… primary |
| 036117696 | IL | Pediatrics Physician |
| 40169 | AZ | Pediatric Emergency Medicine (Pediatrics)… |
| 036117696 | IL | Pediatric Emergency Medicine (Pediatrics)… |
| 036117696 | IL | Emergency Medicine Physician |
Licences are recorded in 2 states: IL, AZ. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Emergency Medicine
- PAC ID
- 9931293404
- Enrollment ID
- I20070915000072
Medicare enrolment is recorded as approved under the provider type Practitioner - Emergency Medicine. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
Licensed in 2 states
This provider holds licences in 2 states: Arizona and Illinois. The practice address on file is in Naperville, IL, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- 036117696
- Specialty
- Pediatric Emergency Medicine (Emergency…
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Pediatric Emergency Medicine covers
Pediatric Emergency Medicine is a clinical subspecialty that focuses on the care of the acutely ill or injured child in the setting of an emergency department. NUCC Health Care Provider Taxonomy, code 207PP0204X
All registered taxonomy codes
This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207PP0204X | Pediatric Emergency Medicine (Emergency Medicine) Physician Pediatric Emergency Medicine | 036117696 | IL | primary |
| 208000000X | Pediatrics Physician | 036117696 | IL | |
| 2080P0204X | Pediatric Emergency Medicine (Pediatrics) Physician Pediatric Emergency Medicine | 40169 | AZ | |
| 2080P0204X | Pediatric Emergency Medicine (Pediatrics) Physician Pediatric Emergency Medicine | 036117696 | IL | |
| 207P00000X | Emergency Medicine Physician | 036117696 | IL |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1952518920 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 17, 2007 |
| Last updated | Nov 14, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
801 S WASHINGTON ST Naperville, IL 60540 (630) 527-3000 Fax (630) 527-3371 |
| Mailing address |
2650 RIDGE AVE STE 1223 Evanston, IL 60201 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 9 | 5 | 2 | 5 | 1 | 8 | 9 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 1 | 2 | 1 | 1 | 7 | 9 | 4 |
Sum = 60 · next multiple of 10 = 60 · check digit = 0 · actual last digit = 0
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.