Margaret Kowalski, MD
Margaret Kowalski, MD is a Pediatric Emergency Medicine (Emergency Medicine) Physician in Saint Louis, MO, registered under NPI 1902538507. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1 CHILDRENS PL DIV PED EMERGENCY MED, Saint Louis, MO 63110. 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 |
|---|---|---|
| 2023028743 | MO | Pediatric Emergency Medicine (Emergency… primary |
| 2023028743 | MO | Pediatrics Physician |
| 2023028743 | MO | Hospitalist Physician |
This provider holds licence 2023028743 issued in MO. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
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 3 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 | 2023028743 | MO | primary |
| 208000000X | Pediatrics Physician | 2023028743 | MO | |
| 208M00000X | Hospitalist Physician | 2023028743 | MO |
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 | 1902538507 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 30, 2022 |
| Last updated | Aug 25, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | MD |
| Practice address |
1 CHILDRENS PL DIV PED EMERGENCY MED Saint Louis, MO 63110 (314) 454-2341 Fax (314) 454-4345 |
| Mailing address |
PO BOX 7412011 Chicago, IL 60674 |
| Other identifiers |
200111858
· Medicaid (MO) |
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 | 0 | 2 | 5 | 3 | 8 | 5 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 0 | 2 | 1 | 3 | 7 | 5 | 0 |
Sum = 53 · next multiple of 10 = 60 · check digit = 7 · actual last digit = 7
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.