Maria Nilsson, M.S.N, A.P.N-BC
Maria Nilsson, M.S.N, A.P.N-BC is a Clinical Nurse Specialist in Oak Lawn, IL, registered under NPI 1881927457. 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 4400 W 95TH ST STE 6409, Oak Lawn, IL 60453. 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 |
|---|---|---|
| 209.007591 | IL | Adult Health Clinical Nurse Specialist |
| 209-007591 | IL | Nurse Practitioner |
| 209007591 | IL | Clinical Nurse Specialist primary |
This provider holds licence 209.007591 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 - Certified Clinical Nurse Specialist (cns)
- PAC ID
- 9436440559
- Enrollment ID
- I20240701001956
Medicare enrolment is recorded as approved under the provider type Practitioner - Certified Clinical Nurse Specialist (cns). 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 Clinical Nurse Specialist covers
A registered nurse who, through a graduate degree program in nursing, or through a formal post-basic education program or continuing education courses and clinical experience, is expert in a specialty area of nursing practice within one or more of the components of direct patient/client care, consultation, education, research and administration. NUCC Health Care Provider Taxonomy, code 364S00000X
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 | |
|---|---|---|---|---|
| 364SA2200X | Adult Health Clinical Nurse Specialist Adult Health | 209.007591 | IL | |
| 363L00000X | Nurse Practitioner | 209-007591 | IL | |
| 364S00000X | Clinical Nurse Specialist | 209007591 | IL | primary |
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 | 1881927457 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 14, 2009 |
| Last updated | May 4, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | M.S.N, A.P.N-BC |
| Practice address |
4400 W 95TH ST STE 6409 Oak Lawn, IL 60453 (877) 684-4327 Fax (708) 684-7040 |
| Mailing address |
4400 W 95TH ST SUITE 407-409 Oak Lawn, IL 60453 |
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 | 8 | 8 | 1 | 9 | 2 | 7 | 4 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 7 | 1 | 9 | 2 | 5 | 4 | 1 |
Sum = 63 · next multiple of 10 = 70 · 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.