Doris Van Byssum, PSY.D.
Doris Van Byssum, PSY.D. is a Psychiatric/Mental Health Nurse Practitioner in Wheaton, IL, registered under NPI 1063515369. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1725 S NAPERVILLE RD SUITE 206, Wheaton, IL 60189. 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 |
|---|---|---|
| 209.010527041.189584 | IL | Psychiatric/Mental Health Nurse… primary |
| 071-004744 | IL | Clinical Psychologist |
This provider holds licence 209.010527041.189584 issued in IL. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Clinical Psychologist
- PAC ID
- 9931294931
Enrolled in Medicare 2 times, across 1 state:
| State | Enrollment ID | Provider type |
|---|---|---|
| Illinois | I20071005000458 | Practitioner - Clinical Psychologist |
| Illinois | I20160210001934 | Practitioner - Nurse Practitioner |
Medicare enrolment is recorded as approved under the provider type Practitioner - Clinical Psychologist. There are 2 separate enrolment records. Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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.
What Psychiatric/Mental Health covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LP0808X
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 | |
|---|---|---|---|---|
| 363LP0808X | Psychiatric/Mental Health Nurse Practitioner Psychiatric/Mental Health | 209.010527041.189584 | IL | primary |
| 103TC0700X | Clinical Psychologist Clinical | 071-004744 | 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 | 1063515369 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 6, 2006 |
| Last updated | Mar 14, 2017 |
| Status | Active |
| Sole proprietor | No |
| Credential | PSY.D. |
| Practice address |
1725 S NAPERVILLE RD SUITE 206 Wheaton, IL 60189 (630) 653-6441 Fax (630) 653-8409 |
| Mailing address |
174 S MONTCLAIR AVE Glen Ellyn, IL 60137 |
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 | 0 | 6 | 3 | 5 | 1 | 5 | 3 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 3 | 3 | 1 | 1 | 1 | 3 | 3 |
Sum = 41 · next multiple of 10 = 50 · check digit = 9 · actual last digit = 9
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.