Active NPI
Bruce Gary Gellin
- Infectious Disease Physician
- Washington, DC
National Provider Identifier
1649198946
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Infectious Disease Physician
- License
- D0044114
- Practice address
- 4000 Reservoir Rd NW
Washington, DC 20007-2145 - Phone
- (202) 966-1013
- NPI assigned
- Jul 6, 2026
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Infectious Disease Physician | 207RI0200X | D0044114 | MD | Primary |
Addresses
Primary practice location
4000 Reservoir Rd NW
Washington, DC 20007-2145
Mailing address
4000 Reservoir Rd NW
Washington, DC 20007-2145
Phone (202) 966-1013
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1783296000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783296000000",
"number": "1649198946",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "4000 RESERVOIR RD NW",
"city": "WASHINGTON",
"state": "DC",
"postal_code": "200072145",
"telephone_number": "202-966-1013"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "4000 RESERVOIR RD NW",
"city": "WASHINGTON",
"state": "DC",
"postal_code": "200072145",
"telephone_number": "202-966-1013"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GELLIN",
"first_name": "BRUCE",
"middle_name": "GARY",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2026-07-06",
"last_updated": "2026-07-06",
"certification_date": "2026-07-07",
"status": "A"
},
"taxonomies": [
{
"code": "207RI0200X",
"taxonomy_group": "",
"desc": "Internal Medicine, Infectious Disease",
"state": "MD",
"license": "D0044114",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Washington, DC
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 6, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.