Data from the NPPES registry. May not reflect recent changes — verify at nppes.cms.hhs.gov.
DR. WILLAIM ALLEN DECKER, PH. D.
Active Sole ProprietorDR. WILLAIM ALLEN DECKER, PH. D. is a Cognitive & Behavioral Psychologist healthcare provider located in ALEXANDRIA, Virginia. NPI 1033234950 is currently active in the NPPES registry. Verify at CMS.
Cognitive & Behavioral Psychologist · ALEXANDRIA, VA
Registration Details
- NPI Number
- 1033234950
- Provider Type
- Individual
- Gender
- Male
- NPI Issued
- Mar 20, 2007 (19.414092429386 yrs)
- Last Updated
- Sep 11, 2025
- Licenses
-
0810002331 (VA)0810002331 (VA)0810002331 (VA)0810002331 (VA)
- Sole Proprietor
- Yes
Practice Information
- Address
-
1423 POWHATAN STSUITE 8ALEXANDRIA, VA, 223141389Browse VA providers · Browse ZIP 22314
- Phone
- 7038363678
- Fax
- 7038362667
- Primary Specialty
-
Cognitive & Behavioral Psychologist
103TB0200X
- Additional Specialty
- Cognitive & Behavioral Psychologist
- Additional Specialty
- Clinical Psychologist
- Additional Specialty
- Health Service Psychologist
Data sourced from the NPPES National Provider Identifier registry. This information is for informational purposes only and is not a substitute for verifying credentials with the appropriate licensing authority. For official verification, use the NPPES NPI Registry or the relevant state medical board.