Individual
DR. WILLAIM ALLEN DECKER
Active
Sole proprietor
Yes
Provider details
NPI number
Gender
Man
Credential
PH. D.
Contact information
Practice address
1423 POWHATAN ST, SUITE 8, ALEXANDRIA, VA 22314-1389
(703) 836-3678
(703) 836-2667
Mailing address
1423 POWHATAN ST, SUITE 7, ALEXANDRIA, VA 22314-1389
(703) 836-3678
(703) 836-2667
Taxonomy
Speciality
Code
Description
License number
State
103G00000X
Clinical Neuropsychologist
0810002331
VA
103TB0200X
Cognitive & Behavioral Psychologist
Primary
0810002331
VA
103TC0700X
Clinical Psychologist
0810002331
VA
103TH0100X
Health Service Psychologist
0810002331
VA
Other
Other identifiers
Code
Description
Identifier
Issuer
State
01
—
A7860001
BCBS NCA CAREFIRST
MD
Enumeration date
03/20/2007
Last updated
09/11/2025
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