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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. WILLIAM ALLAN GRADWELL PH.D.
NPI 1891758058
Psychologist - Clinical in Bethesda, MD

Active since April 10, 2006
NATIONAL NAVAL MEDICAL CENTER, 8901 WISCONSIN AVE, BETHESDA, MD 20889(301) 319-8193(301) 295-2070 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. William Allan Gradwell Ph.d. NPPES

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

DR. WILLIAM ALLAN GRADWELL PH.D. (NPI 1891758058) is an individual clinical provider in Bethesda, Maryland, licensed in New Jersey (1013) and active in the NPI registry since April 2006.

NPPES Registry Identity

NPI1891758058
Entity TypeIndividualMale
Primary Taxonomy103TC0700X
Provider Legal NameDR. WILLIAM ALLAN GRADWELLCredential: PH.D.
Location AddressNATIONAL NAVAL MEDICAL CENTER, 8901 WISCONSIN AVEBethesda, MD 20889-0001
Mailing Address14013 Broomall LnSilver Spring, MD 20906-3055 · (301) 319-8193 · Fax (301) 295-2070
Phone(301) 319-8193
Fax(301) 295-2070
Sole ProprietorNo
Enumeration DateApril 10, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1891758058 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in NJ · 1013
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
NATIONAL NAVAL MEDICAL CENTER, Bethesda, MD 20889
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Other Providers at the Same Location NPPES 20

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

MS. SARAH STOKES HATCH PA-C
Physician Assistant (Medical)
NATIONAL NAVAL MEDICAL CENTER, 8901 WISCONSIN AVE.
BETHESDA, MD 20889
Montgomery County (301) 295-0196
MRS. ELIZABETH BOOTH MYHRE NURSE PRACTITIONER
Nurse Practitioner (Pediatrics)
NATIONAL NAVAL MEDICAL CENTER, 8901 WISCONSIN AVE
BETHESDA, MD 20889
Montgomery County (301) 295-5600
DR. PAUL K HAN MD
Internal Medicine
NATIONAL NAVAL MEDICAL CENTER, 8901 WISCONSIN AVENUE
BETHESDA, MD 20889
Montgomery County (301) 295-6230
DR. ARMANDO OLIVA M.D.
Psychiatry & Neurology (Neurology)
NATIONAL NAVAL MEDICAL CENTER, 8901 WISCONSIN AVE
BETHESDA, MD 20889
Montgomery County (301) 295-4770
DR. MICHELLE BOYMANN KRAVITZ M.D.
Pediatrics
NATIONAL NAVAL MEDICAL CENTER, 8901 WISCONSIN AVE
BETHESDA, MD 20889
Montgomery County (301) 295-5257
DR. VINCENT B. HO M.D.
Radiology (Diagnostic Radiology)
NATIONAL NAVAL MEDICAL CENTER, 8901 WISCONSIN AVE.
BETHESDA, MD 20889
Montgomery County (301) 295-1898
DR. KATHLEEN SUSAN KENNY D.D.S.
Dentist (Prosthodontics)
NATIONAL NAVAL MEDICAL CENTER, 8901 WISCONSIN AVE.
BETHESDA, MD 20889
Montgomery County (301) 319-4649
MS. LINDA ANN CONIGLIO CHT, OTR/L
Specialist
NATIONAL NAVAL MEDICAL CENTER, 8901WISCONSIN AVE.
BETHESDA, MD 20889
Montgomery County (301) 295-4866

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 William Gradwell's NPI number?

The NPI number for William Gradwell is 1891758058. It was assigned to this individual provider in the NPPES registry on April 10, 2006.

Where is William Gradwell located?

William Gradwell practices at National Naval Medical Center 8901 Wisconsin Ave, Bethesda, MD 20889. The listed phone number is (301) 319-8193.

What is William Gradwell's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

When was this NPI record last updated?

The NPPES record for William Gradwell was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.