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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

BRUCE GARY GELLIN
NPI 1649198946
Internal Medicine - Infectious Disease in Washington, DC

Active since July 06, 2026
4000 RESERVOIR RD NW, WASHINGTON, DC 20007(202) 966-1013 Get Directions Write a Review

NPPES record added: July 6, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Bruce Gary Gellin NPPES

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

BRUCE GARY GELLIN (NPI 1649198946) is an individual infectious disease provider in Washington, District Of Columbia, licensed in Maryland (D0044114) and active in the NPI registry since July 2026.

NPPES Registry Identity

NPI1649198946
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameBRUCE GARY GELLIN
Location Address4000 RESERVOIR RD NWWashington, DC 20007-2145
Mailing Address4000 Reservoir Rd NwWashington, DC 20007-2145 · (202) 966-1013
Phone(202) 966-1013
Sole ProprietorYes
Enumeration DateJuly 6, 2026
NPPES CertifiedJuly 7, 2026
✔ NPI 1649198946 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in MD · D0044114
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
4000 RESERVOIR RD NW, Washington, DC 20007
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Other Providers at the Same Location NPPES 5

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

DR. KENNETH TERCYAK
Psychologist (Clinical)
4000 RESERVOIR RD NW
WASHINGTON, DC 20007
District of Columbia (202) 444-2224
ROHAN THAKUR
Student in an Organized Health Care Education/Training Program
4000 RESERVOIR RD NW
WASHINGTON, DC 20007
District of Columbia (202) 687-0100
BRYAN OYAREBU
Student in an Organized Health Care Education/Training Program
4000 RESERVOIR RD NW
WASHINGTON, DC 20007
District of Columbia (347) 424-8748
THOMAS EDWARD HOLMAN
Student in an Organized Health Care Education/Training Program
4000 RESERVOIR RD NW
WASHINGTON, DC 20007
District of Columbia (202) 687-0100
LAUREN HUANG
Student in an Organized Health Care Education/Training Program
4000 RESERVOIR RD NW
WASHINGTON, DC 20007
District of Columbia (202) 687-0100

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 Bruce Gellin's NPI number?

The NPI number for Bruce Gellin is 1649198946. It was assigned to this individual provider in the NPPES registry on July 6, 2026.

Where is Bruce Gellin located?

Bruce Gellin practices at 4000 Reservoir Rd NW, Washington, DC 20007. The listed phone number is (202) 966-1013.

What is Bruce Gellin's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

When was this NPI record last updated?

The NPPES record for Bruce Gellin was last updated on July 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 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.