Willaim Allen Decker, PH. D.
Willaim Allen Decker is a Cognitive & Behavioral specialist based in Alexandria, VA with over 51 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Patients across VA can see Willaim Allen Decker, PH. D. in person in Alexandria or via virtual visit — no travel required. With 51+ years of experience, he has been practicing in the Alexandria area. CMS Medicare data shows his patients commonly have mood disorders, anxiety, and hypertension.
Older · 255dNPPES updated 2025-09-11 · verify NPI on CMS · Verify license at Virginia Board of Medicine
Contact & Location
Practice Location
1423 Powhatan St Suite 8, Alexandria, VA 22314-1389
How Does This Doctor Compare?
Medicare Patients
24
Unique beneficiaries
Boutique practiceData Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Mood Disorders, Anxiety Disorders, and Hypertension.
Conditions affecting emotional state, including depression and bipolar disorder
Excessive worry or fear that interferes with daily life
High blood pressure — a leading risk factor for heart disease and stroke
Elevated cholesterol or triglycerides that increase heart disease risk
A mood disorder causing persistent sadness and loss of interest in activities
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
51 years in practice
Senior practitioner
A psychologist who reflects an experimental-clinical approach distinguished by use of principles of human learning and development and theories of cognitive processing to promote meaningful change in maladaptive human behavior and thinking.
Taxonomy: 103TB0200X
Mailing address
1423 Powhatan St Suite 7, Alexandria, VA 22314-1389
Differs from practice location
Virtual Cognitive & Behavioral Care With Willaim Allen Decker
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Willaim Allen Decker for mood disorder follow-ups, anxiety counseling, blood pressure monitoring — no travel to Alexandria required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Willaim Allen Decker
NPI records show Dr. Decker as active with telehealth listed in Alexandria, VA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (703) 836-3678.
Sourced from CMS NPPES · OIG LEIE · CMS Physician Comparator. See Data Methodology.
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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.
Contact Willaim Allen Decker
Practice Location
1423 Powhatan St Suite 8, Alexandria, VA 22314-1389
Mailing Address
1423 Powhatan St Suite 7, Alexandria, VA 22314-1389
This is a provider directory. Contact the office directly to schedule appointments.
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