Maria Stewart, PSYD
Maria Stewart, PSYD is a Clinical Child & Adolescent Psychologist in Elmhurst, IL, registered under NPI 1669535456. This provider registers 2 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 1047 S YORK RD, Elmhurst, IL 60126. 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 |
|---|---|---|
| 071005206 | IL | Clinical Child & Adolescent Psychologist primary |
| 146001511 | IL | Speech-Language Pathologist |
This provider holds licence 071005206 issued in IL. 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 Clinical Child & Adolescent covers
A psychologist who develops and applies scientific knowledge to the delivery of psychological services to infants, toddlers, children and adolescents within their social context. Of particular importance to the specialty of clinical child psychology is an understanding of the basic psychological needs of children and adolescents, and how the family and other social contexts influence the socio-emotional adjustment, cognitive development, behavioral adaptation and health status of children and adolescents. NUCC Health Care Provider Taxonomy, code 103TC2200X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 103TC2200X | Clinical Child & Adolescent Psychologist Clinical Child & Adolescent | 071005206 | IL | primary |
| 235Z00000X | Speech-Language Pathologist | 146001511 | 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 | 1669535456 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 19, 2006 |
| Last updated | May 23, 2008 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | PSYD |
| Practice address |
1047 S YORK RD Elmhurst, IL 60126 (630) 852-7336 Fax (630) 852-8177 |
| Mailing address |
707 RIDGEVIEW ST Downers Grove, IL 60516 |
| Other identifiers |
04922024
· Other (IL) 2222567 · Other (IL) |
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 | 6 | 6 | 9 | 5 | 3 | 5 | 4 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 3 | 9 | 1 | 3 | 1 | 4 | 1 |
Sum = 54 · next multiple of 10 = 60 · check digit = 6 · actual last digit = 6
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.