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

DR. BARBARA CHRISTINE WILLIAMSON M.D.
NPI 1972596690
Dermatology in Largo, MD

Active since August 28, 2005
1400 MERCANTILE LN, STE#110, LARGO, MD 20774(301) 772-9775(301) 772-8395 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Barbara Christine Williamson M.d. NPPES

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

DR. BARBARA CHRISTINE WILLIAMSON M.D. (NPI 1972596690) is an individual dermatology provider in Largo, Maryland, licensed in Maryland (D0031566) and active in the NPI registry since August 2005.

NPPES Registry Identity

NPI1972596690
Entity TypeIndividualFemale
Primary Taxonomy207N00000X
Provider Legal NameDR. BARBARA CHRISTINE WILLIAMSONCredential: M.D.
Location Address1400 MERCANTILE LN, STE#110Largo, MD 20774-5341
Mailing AddressPo Box 493Greenbelt, MD 20768-0493
Fax(301) 772-8395
Sole ProprietorNo
Enumeration DateAugust 28, 2005
Last NPPES UpdateJuly 13, 2026
NPI 1972596690 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
License Licensed in MD · D0031566
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
1400 MERCANTILE LN, Largo, MD 20774

Other Names 1

Other Name (5)Mrs. Barbara Williamson Henry

Other Identifiers 4

Other348025MD · Unitedhealthcare/mamsi
Other560789MD · Aetna
Other9601-0001MD · Carefirstd.c.
Other6732BCMD · Carefirst Maryland

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.

Counselor (Professional)
1400 MERCANTILE LN, SUITE 208
LARGO, MD 20774
Social Worker (Clinical)
1400 MERCANTILE LN, SUITE 232
LARGO, MD 20774
Dermatology (Procedural Dermatology)
1400 MERCANTILE LN, SUITE 110
LARGO, MD 20774
Clinic/Center (Magnetic Resonance Imaging (MRI))
1400 MERCANTILE LN, #174
LARGO, MD 20774
Social Worker (Clinical)
1400 MERCANTILE LN, SUITE 260
LARGO, MD 20774
Occupational Therapist
1400 MERCANTILE LN, 240
LARGO, MD 20774
Day Training, Developmentally Disabled Services
1400 MERCANTILE LN, 212
LARGO, MD 20774
Social Worker (Clinical)
1400 MERCANTILE LN, 232
LARGO, MD 20774

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 Barbara Williamson's NPI number?

The NPI number for Barbara Williamson is 1972596690. It was assigned to this individual provider in the NPPES registry on August 28, 2005. The provider is also known as Mrs. Barbara Williamson Henry.

Where is Barbara Williamson located?

Barbara Williamson practices at 1400 Mercantile Ln Ste#110, Largo, MD 20774. The listed phone number is (301) 772-9775.

What is Barbara Williamson's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

When was this NPI record last updated?

The NPPES record for Barbara Williamson 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 31 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.