Active NPI
Swati Viswanathan, MD
- Nephrology Physician
- Washington, DC
National Provider Identifier
1851972004
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Nephrology Physician
- License
- MD500003151
- Practice address
- 2150 Pennsylvania Ave NW
Washington, DC 20037-3201 - Phone
- (202) 677-6056
- Fax
- (202) 741-2427
- NPI assigned
- Apr 19, 2021
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Nephrology Physician | 207RN0300X | MD500003151 | DC | Primary |
| Internal Medicine Physician | 207R00000X | MD500003151 | DC |
Addresses
Primary practice location
2150 Pennsylvania Ave NW
Washington, DC 20037-3201
Mailing address
2150 Pennsylvania Ave NW
Washington, DC 20037-3201
Phone (202) 677-6056
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in VA, DC
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 2
Care Compare profile
Medicare Care Compare- Specialty
- Internal Medicine
- Education
- Other, 2014
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
1860 Town Ctr Dr
Reston, VA 20190-5899
1897 Preston White Dr
Suite 105
Reston, VA 20191-5475
Phone (703) 468-1270
9470 Annapolis Rd
Suite 309
Lanham, MD 20706-3022
Phone (202) 832-1800
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1618790400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1785196800000",
"number": "1851972004",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "2150 PENNSYLVANIA AVE NW",
"city": "WASHINGTON",
"state": "DC",
"postal_code": "200373201",
"telephone_number": "202-677-6056",
"fax_number": "202-741-2427"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "2150 PENNSYLVANIA AVE NW",
"city": "WASHINGTON",
"state": "DC",
"postal_code": "200373201",
"telephone_number": "202-677-6056",
"fax_number": "202-741-2427"
}
],
"practiceLocations": [],
"basic": {
"last_name": "VISWANATHAN",
"first_name": "SWATI",
"name_prefix": "Dr.",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2021-04-19",
"last_updated": "2026-07-28",
"certification_date": "2026-07-28",
"status": "A"
},
"taxonomies": [
{
"code": "207RN0300X",
"taxonomy_group": "",
"desc": "Internal Medicine, Nephrology",
"state": "DC",
"license": "MD500003151",
"primary": true
},
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "DC",
"license": "MD500003151",
"primary": false
}
],
"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 28, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.