Gregory N. Lewis, PSY.D.
NPI 1063471027ActiveIndividual· Psychologist, Clinical· Wheaton, IL
Psychologist, Clinical (PSY.D.) with Alliance Clinical Associates SC, practicing in Wheaton, Illinois. Medicare paid $41,690 for services to 25 patients in 2024.
Overview
| NPI | 1063471027 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PSY.D. |
| Sole proprietor | Yes |
| NPI issued | Mar 20, 2006 |
| Last updated in NPPES | Apr 26, 2021 |
| Certified by provider | Apr 26, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychologist, Clinical Primary | 103TC0700X | 071-004107 | IL |
| Psychologist | 103T00000X | 071004107 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Clinical Psychologist (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 25 |
|---|---|
| Services billed | 396 across 5 procedure codes |
| Paid by Medicare | $41,690 |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Clinical Psychologist |
| Telehealth | Offers telehealth |
Medical group
- Alliance Clinical Associates SCWheaton, IL · 19 clinicians
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All 82 clinical psychologists in Wheaton · All clinical psychologists in Illinois