William Mack Erwin, PHD
Clinical Psychologist · Psychologist in San Antonio, TX
Provider details
- Specialty
- Clinical Psychologist
- Credentials
- PhD
- NPI number
- 1063562684
Checked against the CMS National Provider Identifier registry on October 2, 2026.
Medicare information
- Medical school
- Texas Tech University Health Science Center School of Medicine, graduated 1971
- Also sees patients at
- 3030 Nacogdoches Rd, Suite 101, San Antonio, TX 78217 · (210) 826-9599
- Medicare
- Accepts Medicare assignment (the Medicare-approved amount as full payment)
- Telehealth
- Offers telehealth visits
From Medicare’s public Care Compare data (Doctors and Clinicians), checked October 3, 2026. Ratings are Medicare’s, not Know Cancer’s. Medicare Care Compare
About
Specialties
- Clinical Psychology
Insurance
- Blue Cross and Blue Shield - BlueCard PPO
- Great West Healthcare PPO
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