NPI age
19 years
Enumerated 2006-12-19
● Active
Type 1 · Individual
DR. William Charles Isler III, PHD
Isler is 1 of 1 psychologist providers in Lackland Afb and 1 of 67 in Texas.
Primary specialty
Psychologist
Licensed in
WA
1 state
Status
Active
No deactivations on record
Last NPPES update
2019-09-11
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 67 active psychologist providers in Texas.
NPI age
19 years
↑ 2 yr above median (17 yr)
State licenses
1 state
4% of peers hold multiple states
Subspecialties
0
41% of peers hold subspecialties
NPI lifetime · 2006 → 2026
2006-12Enumerated in NPPES
2006
2026
Where they practice
Practice location
1100 Wilford Hall Loop Bldg 4554
Lackland Afb, TX 782365638
Mailing address
3403 Fontenay Park
San Antonio, TX 782514745
Specialties
-
Psychologist PrimaryA psychologist, certified/licensed at the independent practice level in his/her state, who is duly trained and experienced in the delivery of direct, preventative, assessment, and therapeutic intervention services to individuals whose...
Practice context
Part of a multi-provider practice. 16 other active providers share this practice address in NPPES.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.