DR. DIANNA E. WASHINGTON PH.D
NPI 1376685842
Psychologist in Silver Spring, MD

Active since February 13, 2007Opted out of Medicare · through Jan 1, 2028
8811 COLESVILLE RD, SUITE 105, SILVER SPRING, MD 20910(301) 587-8307 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Dianna E. Washington Ph.d NPPES

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

DR. DIANNA E. WASHINGTON PH.D (NPI 1376685842) is an individual psychologist in Silver Spring, Maryland, licensed in District Of Columbia (1317) and active in the NPI registry since February 2007. She has opted out of Medicare through January 1, 2028 and remains eligible to order and refer.

NPPES Registry Identity

NPI1376685842
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameDR. DIANNA E. WASHINGTONCredential: PH.D
Location Address8811 COLESVILLE RD, SUITE 105Silver Spring, MD 20910-4343
Mailing Address14547 Jaystone DrSilver Spring, MD 20905-7404 · (301) 587-8307
Sole ProprietorYes
Enumeration DateFebruary 13, 2007
Last NPPES UpdateSeptember 11, 2025
NPI 1376685842 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
Licenses Licensed in DC · 1317 Licensed in MD · 01771
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License 01771 (MD), 1317 (DC)
8811 COLESVILLE RD, Silver Spring, MD 20910

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Opted out of Medicare

Dr. Dianna E. Washington Ph.d has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from January 1, 2014 through January 1, 2028.

Opt-Out Effective DateJanuary 1, 2014
Opt-Out In Effect ThroughJanuary 1, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Other Providers at the Same Location NPPES 15

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

Social Worker (Clinical)
8811 COLESVILLE RD, SUITE 104
SILVER SPRING, MD 20910
Social Worker (Clinical)
8811 COLESVILLE RD, SUITE 102
SILVER SPRING, MD 20910
Pharmacist
8811 COLESVILLE RD, APT 602
SILVER SPRING, MD 20910
Physical Therapist (Geriatrics)
8811 COLESVILLE RD, APT 926
SILVER SPRING, MD 20910
Occupational Therapist
8811 COLESVILLE RD, APT 824
SILVER SPRING, MD 20910
Occupational Therapist
8811 COLESVILLE RD, APARTMENT 302
SILVER SPRING, MD 20910
Social Worker (Clinical)
8811 COLESVILLE RD, SUITE 106
SILVER SPRING, MD 20910
Social Worker (Clinical)
8811 COLESVILLE RD, SUITE 105
SILVER SPRING, MD 20910

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 Dianna Washington's NPI number?

The NPI number for Dianna Washington is 1376685842. It was assigned to this individual provider in the NPPES registry on February 13, 2007.

Where is Dianna Washington located?

Dianna Washington practices at 8811 Colesville Rd Suite 105, Silver Spring, MD 20910. The listed phone number is (301) 587-8307.

What is Dianna Washington's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Dianna Washington enrolled in Medicare?

No. Dianna Washington has opted out of Medicare through January 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Dianna Washington was last updated on September 11, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.