Physician Profile
Unclaimed ProfileAbout ERWIN
Listed in the NPI registry as a clinical psychologist, William Mack Erwin, PhD practises in San Antonio, TX. William graduated from Texas Tech University Health Science Center School of Medicine in 1971. William is also listed as specialising in psychologist — clinical.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What kind of doctor is Dr. Erwin?
Dr. Erwin is a clinical psychologist in San Antonio, TX. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “CLINICAL PSYCHOLOGIST”.
NPI registry
What is Dr. Erwin's address?
Dr. Erwin is listed at 14815 SAN PEDRO AVE, San Antonio, TX 78232. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Erwin?
The number on file is (210) 494-1991. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Erwin's NPI number?
Dr. Erwin's National Provider Identifier is 1063562684. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Erwin train?
Dr. Erwin attended Texas Tech University Health Science Center School of Medicine, graduating in 1971. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Erwin been practising?
Dr. Erwin has 55 years experience. Calculated from a graduation year of 1971, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Erwin perform?
According to Medicare billing data, Dr. Erwin provides treatments such as psychotherapy, 1 hour. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Erwin confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Erwin. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (210) 494-1991
- Email not available
Practice Locations
14815 SAN PEDRO AVE
San Antonio, TX 78232
Procedures Most Often Billed to Medicare
77 services · 11 patients · 1 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Psychotherapy, 1 hour | Treatment | 90837 |
77 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other clinical psychologists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other clinical psychologists in San Antonio 8
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at Texas Tech University Health Science Center School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Also performs Psychotherapy, 1 hour 8
Providers in TX who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.