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POTOMAC NEPHROLOGY, INC.
NPI 1245242528
Internal Medicine - Nephrology in Germantown, MD

Active since August 13, 2006CLIA 21D1066233 · Waiver
1 EXECUTIVE PARK CT, GERMANTOWN, MD 20874(301) 528-3580(301) 528-3589 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Sep 11, 2025, Aug 22, 2020 (2 updates tracked since 2020).

About Potomac Nephrology, Inc. NPPES

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

POTOMAC NEPHROLOGY, INC. (NPI 1245242528) is a healthcare organization registered as a nephrology in Germantown, Maryland and active in the NPI registry since August 2006. The organization holds a CLIA Waiver certificate valid through March 19, 2027 and lists Farzad Assar, President, as its authorized official.

NPPES Registry Identity

NPI1245242528
Entity TypeOrganization
Primary Taxonomy207RN0300X
Legal Business NamePOTOMAC NEPHROLOGY, INC.
Location Address1 EXECUTIVE PARK CTGermantown, MD 20874-2643
Mailing Address1 Executive Park CtGermantown, MD 20874-2643 · (301) 528-3580 · Fax (301) 528-3589
Phone(301) 528-3580
Fax(301) 528-3589
Organization SubpartNo
Authorized OfficialFarzad AssarPresident · (301) 528-3580
Enumeration DateAugust 13, 2006
Last NPPES UpdateSeptember 11, 20252 updates tracked since enumeration
✔ NPI 1245242528 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in MD · D40201
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.
Also ListedInternal MedicineTaxonomy 207R00000X · License D40201 (MD)
1 EXECUTIVE PARK CT, Germantown, MD 20874
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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

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 of Waiver 21D1066233

Potomac Nephrology Inc · Germantown, MD
Active · expires Mar 19, 2027
CLIA Number21D1066233
Laboratory TypePhysician Office
Certificate Effective DateMarch 20, 2025
Certificate Expiration DateMarch 19, 2027
Laboratory DirectorAssar Farzad
Laboratory Phone(301) 528-3580
Laboratory LocationPotomac Nephrology IncOne Executive Park Court, Germantown, MD 20874
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory to perform only waived tests.

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 Potomac Nephrology, Inc.'s NPI number?

The NPI number for Potomac Nephrology, Inc. is 1245242528. It was assigned to this organization in the NPPES registry on August 13, 2006.

Where is Potomac Nephrology, Inc. located?

Potomac Nephrology, Inc. is located at 1 Executive Park Ct, Germantown, MD 20874. The listed phone number is (301) 528-3580.

What is Potomac Nephrology, Inc.'s specialty?

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

Does Potomac Nephrology, Inc. hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 21D1066233) is associated with this NPI, valid through March 19, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Potomac Nephrology, Inc. was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.