William Mack Erwin, PH.D.
NPI 1063562684ActiveIndividual· Psychologist, Clinical· San Antonio, TX
Psychologist, Clinical (PH.D.) in San Antonio, Texas, trained at Texas Tech University Health Science Center School of Medicine (class of 1971). Medicare paid $13,833 for services to 12 patients in 2024.
Overview
| NPI | 1063562684 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PH.D. |
| Sole proprietor | Yes |
| NPI issued | Jan 12, 2007 |
| Last updated in NPPES | Jan 5, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychologist, Clinical Primary | 103TC0700X | 20855 | TX |
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 (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 12 |
|---|---|
| Services billed | 147 across 3 procedure codes |
| Paid by Medicare | $13,833 |
Education and affiliations
| Medical school | Texas Tech University Health Science Center School of Medicine |
|---|---|
| Graduation year | 1971 |
| Medicare specialty | Clinical Psychologist |
| Telehealth | Offers telehealth |
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All 409 clinical psychologists in San Antonio · All clinical psychologists in Texas