NPIMap

Organization Active NPI

Washington Nephrology Associates, L.L.P.

  • Nephrology Physician
  • Rockville, MD
National Provider Identifier
1124193479
Registry record updated Jun 9, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Nephrology PhysicianTaxonomy code 207RN0300X
License
D0024706 Issued in MD
Legal business name
WASHINGTON NEPHROLOGY ASSOCIATES, L.L.P.
Practice address
1201 Seven Locks Rd Ste 200
Rockville, MD 20854-2960
Phone
(301) 907-4646
Fax
(301) 907-7796
NPI assigned
Nov 22, 2006
Organization subpart
Yes
Parent organization
WASHINGTON NEPHROLOGY ASSOCIATES, L.L.P.As reported in NPPES

NPPES NPI Registry

Updated by the provider on Jun 9, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name
Linda Langford
Title
Credentials Coordinator
Phone
(301) 907-3939

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Nephrology PhysicianGroup: 193200000X MULTI-SPECIALTY GROUP 207RN0300X D0024706 MD Primary

Addresses

Primary practice location

1201 Seven Locks Rd Ste 200
Rockville, MD 20854-2960

Mailing address

1201 Seven Locks Rd Ste 200a
Rockville, MD 20854-2931
Phone (301) 907-3939

Other identifiers 5

IdentifierTypeStateIssuer
CA9035OtherRAILROAD MEDICARE
CN0881OtherRAILROAD MEDICARE
DE5304OtherRAILROAD MEDICARE
CA0020OtherRAILROAD MEDICARE
CB3806OtherRAILROAD MEDICARE

Other names 1

  • Washington Nephrology Associates Other name

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MD, VA, DC3 enrollments

Enrollment records 3

Enrollment IDStateProvider typePAC IDDetails
O20040205000428 MD Part B Supplier - Clinic/Group Practice 8527951318 Receives reassigned benefits from 16 practitioners
Practice locations: Baltimore, MD; Glen Burnie, MD; Annapolis, MD
O20040610000023 VA Part B Supplier - Clinic/Group Practice 8527951318 Receives reassigned benefits from 8 practitioners
Practice locations: Woodbridge, VA
O20040610001168 DC Part B Supplier - Clinic/Group Practice 8527951318 Receives reassigned benefits from 38 practitioners
Practice locations: Fairfax, VA; Washington, DC; Takoma Park, MD; Silver Spring, MD; Rockville, MD; Germantown, MD; Chevy Chase, MD; Alexandria, VA…

National Provider Directory

National Provider Directory
Tax ID family
Michael Gelfandmd11 organizations share this tax ID, including this one

Other organizations with this tax ID 10

Organizations that report the same tax identification number in the National Provider Directory.

Member organizations 1

Organizations listed as members of this organization in the National Provider Directory.

Locations

1140 Varnum St NE
Ste 110
Washington, DC 20017
Phone (202) 269-0366

730 24th St NW
Ste 17
Washington, DC 20037
Phone (202) 337-7660

1160 Varnum St NE
Ste 10
Washington, DC 20017
Phone (202) 269-0366

205 Ridgely Ave
Annapolis, MD 21401
Phone (410) 263-6910

6565 N Charles St
Ste 216
Baltimore, MD 21204
Phone (443) 849-3680

2411 W Belvedere Ave
Ste 304
Baltimore, MD 21215
Phone (410) 235-9382

5445 Loch Raven Blvd
Ste 208
Baltimore, MD 21239
Phone (410) 855-4447

4915 Auburn Ave
Ste 200
Bethesda, MD 20814
Phone (301) 907-3939

4915 Auburn Ave
Ste 104
Bethesda, MD 20814
Phone (301) 652-2552

5550 Friendship Blvd
Ste 340
Chevy Chase, MD 20815
Phone (202) 337-7660

12850 Middlebrook Rd
Ste 209
Germantown, MD 20874
Phone (301) 907-4646

19851 Observation Dr
Ste 180
Germantown, MD 20876

85 Kindred Way
Apt 103
Glen Burnie, MD 21061
Phone (410) 921-1363

10313 Georgia Ave
Ste 209
Silver Spring, MD 20902
Phone (301) 681-8000

8101 Hinson Farm Rd
Ste 418
Alexandria, VA 22306
Phone (703) 780-2925

8101 Hinson Farm Rd
Ste 217
Alexandria, VA 22306
Phone (703) 780-1150

4141A Duke St
Alexandria, VA 22304
Phone (703) 461-3556

3700 Joseph Siewick Dr
Ste 400
Fairfax, VA 22033
Phone (703) 620-4300

8316 Arlington Blvd
Ste 104
Fairfax, VA 22031
Phone (703) 560-1313

108 Terminal Dr
Sterling, VA 20166
Phone (703) 478-3970

2030 Opitz Blvd
Woodbridge, VA 22191
Phone (703) 490-9080

Practitioners & affiliated clinicians

Practitioners 57

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

View all 57

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1164153600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1780963200000",
    "number": "1124193479",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1201 SEVEN LOCKS RD STE 200A",
            "city": "ROCKVILLE",
            "state": "MD",
            "postal_code": "208542931",
            "telephone_number": "301-907-3939",
            "fax_number": "301-656-3943"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1201 SEVEN LOCKS RD STE 200",
            "city": "ROCKVILLE",
            "state": "MD",
            "postal_code": "208542960",
            "telephone_number": "301-907-4646",
            "fax_number": "301-907-7796"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "WASHINGTON NEPHROLOGY ASSOCIATES, L.L.P.",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "WASHINGTON NEPHROLOGY ASSOCIATES, L.L.P.",
        "enumeration_date": "2006-11-22",
        "last_updated": "2026-06-09",
        "certification_date": "2026-06-09",
        "status": "A",
        "authorized_official_last_name": "LANGFORD",
        "authorized_official_first_name": "LINDA",
        "authorized_official_title_or_position": "CREDENTIALS COORDINATOR",
        "authorized_official_telephone_number": "301-907-3939"
    },
    "taxonomies": [
        {
            "code": "207RN0300X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Nephrology",
            "state": "MD",
            "license": "D0024706",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "CA9035",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "CN0881",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "DE5304",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "CA0020",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "CB3806",
            "state": null
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Washington Nephrology Associates",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

Other providers in Rockville, MD

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 9, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.