DR. WILLIAM MACK ERWIN PH.D.
NPI 1063562684
Psychologist - Clinical in San Antonio, TX

Active since January 12, 2007PECOS EnrolledAccepts Medicare Assignment
14815 SAN PEDRO AVE, SAN ANTONIO, TX 78232(210) 494-1991(210) 494-7575 Get Directions Write a Review

NPPES record last updated: January 5, 2011. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. William Mack Erwin Ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM MACK ERWIN PH.D. (NPI 1063562684) is an individual clinical provider in San Antonio, Texas, licensed in Texas (20855) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of Texas Tech University Health Science Center School Of Medicine (1971).

NPPES Registry Identity

NPI1063562684
Entity TypeIndividualMale
Primary Taxonomy103TC0700X
Provider Legal NameDR. WILLIAM MACK ERWINCredential: PH.D.
Location Address14815 SAN PEDRO AVESan Antonio, TX 78232-3708
Mailing Address14815 San Pedro AveSan Antonio, TX 78232-3708 · (210) 494-1991 · Fax (210) 494-7575
Fax(210) 494-7575
Sole ProprietorYes
Medical School CMSTexas Tech University Health Science Center School Of MedicineGraduated 1971
Enumeration DateJanuary 12, 2007
Last NPPES UpdateJanuary 5, 2011
NPI 1063562684 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License Licensed in TX · 20855
Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

14815 SAN PEDRO AVE, San Antonio, TX 78232

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. William Mack Erwin Ph.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9830234798
PECOS Enrollment IDI20100303000190
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychotherapy, 1 hour 90837
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 1-hour session, you'll talk about your feelings, thoughts, and behaviors to help identify and manage mental health issues. This process aids in personal growth, healing, and improved well-being.
77 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78232 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$166.88 typical visit price
range $54.84 – $166.88
Typical copayment $41.72 (range $13.71 – $41.72)
Most-billed visit code 99205
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Clinic/Center (Mental Health (Including Community Mental Health Center))
14815 SAN PEDRO AVE
SAN ANTONIO, TX 78232
Psychiatry & Neurology (Psychiatry)
14815 SAN PEDRO AVE
SAN ANTONIO, TX 78232
Psychologist (Health Service)
14815 SAN PEDRO AVE
SAN ANTONIO, TX 78232
Social Worker (Clinical)
14815 SAN PEDRO AVE
SAN ANTONIO, TX 78232
Psychologist (Clinical Child & Adolescent)
14815 SAN PEDRO AVE
SAN ANTONIO, TX 78232
Counselor (Mental Health)
14815 SAN PEDRO AVE
SAN ANTONIO, TX 78232
Counselor (Addiction (Substance Use Disorder))
14815 SAN PEDRO AVE
SAN ANTONIO, TX 78232
Social Worker (Clinical)
14815 SAN PEDRO AVE
SAN ANTONIO, TX 78232

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Erwin's NPI number?

The NPI number for William Erwin is 1063562684. It was assigned to this individual provider in the NPPES registry on January 12, 2007.

Where is William Erwin located?

William Erwin practices at 14815 San Pedro Ave, San Antonio, TX 78232. The listed phone number is (210) 494-1991.

What is William Erwin's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is William Erwin enrolled in Medicare?

Yes. William Erwin is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does William Erwin accept?

Health plans from Blue Cross and Blue Shield of Texas list William Erwin as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for William Erwin was last updated on January 5, 2011. NPI Profile syncs with the weekly NPPES data releases published by CMS.