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WASHINGTON NEPHROLOGY ASSOCIATES, L.L.P.
NPI 1124193479
Internal Medicine - Nephrology in Rockville, MD

Active since November 22, 2006CLIA Certified · 2 labs
1201 SEVEN LOCKS RD STE 200, ROCKVILLE, MD 20854(301) 907-4646(301) 907-7796 Get Directions Write a Review

NPPES record last updated: June 9, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 8, 2024, Jun 5, 2023 (2 updates tracked since 2023).

About Washington Nephrology Associates, L.l.p. NPPES

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

WASHINGTON NEPHROLOGY ASSOCIATES, L.L.P. (NPI 1124193479) is a healthcare organization registered as a nephrology in Rockville, Maryland and active in the NPI registry since November 2006. The organization holds 2 active CLIA laboratory certificates and lists Linda Langford, Credentials Coordinator, as its authorized official.

NPPES Registry Identity

NPI1124193479
Entity TypeOrganization
Primary Taxonomy207RN0300X
Legal Business NameWASHINGTON NEPHROLOGY ASSOCIATES, L.L.P.
Location Address1201 SEVEN LOCKS RD STE 200Rockville, MD 20854-2960
Mailing Address1201 Seven Locks Rd Ste 200aRockville, MD 20854-2931 · (301) 907-3939 · Fax (301) 656-3943
Phone(301) 907-4646
Fax(301) 907-7796
Organization SubpartYes
Authorized OfficialLinda LangfordCredentials Coordinator · (301) 907-3939
Enumeration DateNovember 22, 2006
Last NPPES UpdateJune 9, 20262 updates tracked since enumeration
NPPES CertifiedJune 9, 2026
✔ NPI 1124193479 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in MD · D0024706
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
1201 SEVEN LOCKS RD STE 200, Rockville, MD 20854
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Other Names 1

Other NameWashington Nephrology Associates

Other Identifiers 5

OtherCA9035Railroad Medicare
OtherCN0881Railroad Medicare
OtherDE5304Railroad Medicare
OtherCA0020Railroad Medicare
OtherCB3806Railroad Medicare

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

CLIA Laboratory Certificates CMS CLIA 2

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate for Provider-Performed Microscopy Procedures (PPMP) 21D0867446

Washington Nephrology Assoc · Rockville, MD
Active · expires Mar 9, 2027
CLIA Number21D0867446
Laboratory TypePhysician Office
Certificate Effective DateMarch 10, 2025
Certificate Expiration DateMarch 9, 2027
Laboratory DirectorGail L. Seiken
Laboratory Phone(301) 907-4646
Laboratory LocationWashington Nephrology Assoc1201 Seven Locks Rd, Ste 200, Rockville, MD 20854
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

Certificate for Provider-Performed Microscopy Procedures (PPMP) 21D2203048

Washington Nephrology Associates · Germantown, MD
Active · expires Dec 1, 2026
CLIA Number21D2203048
Laboratory TypePhysician Office
Certificate Effective DateDecember 2, 2024
Certificate Expiration DateDecember 1, 2026
Laboratory DirectorSandesh Joshi
Laboratory Phone(301) 907-4646
Laboratory LocationWashington Nephrology Associates12850 Middlebrook Rd #209, Germantown, MD 20874
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

Other Providers at the Same Location NPPES 4

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

ANIRUDDHA BHATTACHARYYA MD
Internal Medicine
1201 SEVEN LOCKS RD STE 200
ROCKVILLE, MD 20854
Montgomery County (301) 907-4646
WASHINGTON NEPHROLOGY ASSOCIATES, L.L.P.
Internal Medicine (Nephrology)
1201 SEVEN LOCKS RD STE 200
ROCKVILLE, MD 20854
Montgomery County (301) 907-4646
VIKRAM J DORAISWAMY M.D.
Internal Medicine (Nephrology)
1201 SEVEN LOCKS RD STE 200
ROCKVILLE, MD 20854
Montgomery County (301) 907-4646
DR. SUSAN MERL GINSBERG MD
Internal Medicine (Nephrology)
1201 SEVEN LOCKS RD STE 200
ROCKVILLE, MD 20854
Montgomery County (301) 907-3939

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 Washington Nephrology Associates, L.L.P.'s NPI number?

The NPI number for Washington Nephrology Associates, L.L.P. is 1124193479. It was assigned to this organization in the NPPES registry on November 22, 2006. The provider is also known as Washington Nephrology Associates.

Where is Washington Nephrology Associates, L.L.P. located?

Washington Nephrology Associates, L.L.P. is located at 1201 Seven Locks Rd Ste 200, Rockville, MD 20854. The listed phone number is (301) 907-4646.

What is Washington Nephrology Associates, L.L.P.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Does Washington Nephrology Associates, L.L.P. hold CLIA laboratory certificates?

Yes. 2 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

When was this NPI record last updated?

The NPPES record for Washington Nephrology Associates, L.L.P. was last updated on June 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.