William Michael Arnold
William Michael Arnold is a Behavior Analyst provider (Behavior Analyst) practicing in Joliet, IL, registered in the NPPES registry with NPI 1366687543 since 2008.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1366687543 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | William Michael Arnold |
| Sex | Male |
| Practice address | 777 JOYCE RD, Joliet, IL, 60436 |
| Phone | 8157276666 |
| Fax | 8157231177 |
| Enumeration date | 2008-12-02 |
| Last updated in NPPES | 2008-12-02 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103K00000X | Behavior Analyst | Primary | — | — |
Copy-ready billing details
Provider: William Arnold NPI: 1366687543 Taxonomy: 103K00000X (Behavior Analyst) Address: 777 JOYCE RD, Joliet, IL, 60436
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1205816345 | Cornerstone Services Inc | Organization | Mental Health Clinic/Center (Including Community Mental Health Center) | Joliet, IL |
| 1881854586 | Michael Malkusak | Individual | Specialist | Joliet, IL |
| 1215198106 | Nick Turton | Individual | Specialist | Joliet, IL |
| 1447570536 | Victoria Pellettiere | Individual | Behavior Analyst | Joliet, IL |
| 1518278704 | Kathryn Grella | Individual | Social Worker | Joliet, IL |
| 1740567502 | Nicole Koren | Individual | Behavior Analyst | Joliet, IL |
| 1679850184 | Mulan Dai | Individual | Behavior Analyst | Joliet, IL |
| 1710321609 | Louis Sandler | Individual | Behavior Analyst | Joliet, IL |
Verify this record
Cross-check NPI 1366687543 against the authoritative CMS record: view William Michael Arnold on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2008-12-02.