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MARJORIE B. MCKNIGHT MD PC
NPI 1245913052
Pediatrics in Washington, DC

Active since August 09, 2023CLIA 09D2263580 · Waiver
106 IRVING ST NW STE 2300, WASHINGTON, DC 20010(202) 291-6257(202) 726-4926 Get Directions Write a Review

NPPES record last updated: February 20, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Marjorie B. Mcknight Md Pc NPPES

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

MARJORIE B. MCKNIGHT MD PC (NPI 1245913052), doing business as Zarminali Pediatrics, is a healthcare organization registered as a pediatrics in Washington, District Of Columbia and active in the NPI registry since August 2023. The organization holds a CLIA Waiver certificate valid through June 28, 2028, maintains a secondary practice location in Washington, and lists Kyle Anthony Butler-myers, Practice Manager, as its authorized official.

NPPES Registry Identity

NPI1245913052
Entity TypeOrganization
Primary Taxonomy208000000X
Legal Business NameMARJORIE B. MCKNIGHT MD PC
Location Address106 IRVING ST NW STE 2300Washington, DC 20010-2959
Mailing Address106 Irving St Nw Ste 2300Washington, DC 20010-2959 · (202) 291-6257 · Fax (202) 726-4926
Phone(202) 291-6257
Fax(202) 726-4926
Organization SubpartNo
Authorized OfficialKyle Anthony Butler-myersPractice Manager · (202) 829-2984
Enumeration DateAugust 9, 2023
Last NPPES UpdateFebruary 20, 2026
NPPES CertifiedFebruary 20, 2026
✔ NPI 1245913052 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Also ListedCounselor · ProfessionalTaxonomy 101YP2500X
106 IRVING ST NW STE 2300, Washington, DC 20010
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Other Names 3

Doing Business AsZarminali Pediatrics
Doing Business AsZarminali Pediatrics - Hospital Center
Other NameMcknight Pediatrics

Secondary Practice Location 1

Location 1106 Irving St NW Ste 2600Washington, DC 20010-2962 · Phone (202) 291-6257 · Fax (202) 726-4926

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 09D2263580

Marjorie B Mcknight MD, PC · Washington, DC
Active · expires Jun 28, 2028
CLIA Number09D2263580
Laboratory TypePhysician Office
Certificate Effective DateJune 29, 2026
Certificate Expiration DateJune 28, 2028
Laboratory DirectorDr. Marjorie B. Mcknight
Laboratory Phone(202) 291-6257
Laboratory LocationMarjorie B Mcknight MD, PC106 Irving Street, NW Suite 2300, Washington, DC 20010
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES 7

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

DR. DIANA ANGELA JEFFERSON PHD
Psychologist
106 IRVING ST NW STE 2300
WASHINGTON, DC 20010
District of Columbia (240) 863-2282
KATRINA SANFORD PSYD
Psychologist (Clinical)
106 IRVING ST NW STE 2300
WASHINGTON, DC 20010
District of Columbia (571) 276-3945
DR. MAIA S MCCUISTON M.D.
Pediatrics
106 IRVING ST NW STE 2300
WASHINGTON, DC 20010
District of Columbia (202) 291-6257
DR. ROBIN E CLOSSON PH.D
Psychologist (Clinical Child & Adolescent)
106 IRVING ST NW STE 2300
WASHINGTON, DC 20010
District of Columbia (301) 367-4827
MELISSA WILLIAMS MD
Pediatrics
106 IRVING ST NW STE 2300
WASHINGTON, DC 20010
District of Columbia (202) 291-6259
THE MCCUISTON GROUP
Pediatrics
106 IRVING ST NW STE 2300
WASHINGTON, DC 20010
District of Columbia (202) 291-6257
MISS MEGAN ELIZABETH ARDAGH LPC
Pediatrics
106 IRVING ST NW STE 2300
WASHINGTON, DC 20010
District of Columbia (202) 291-6257

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 Marjorie B. Mcknight MD PC's NPI number?

The NPI number for Marjorie B. Mcknight MD PC is 1245913052. It was assigned to this organization in the NPPES registry on August 9, 2023. The provider is doing business as Zarminali Pediatrics and Zarminali Pediatrics - Hospital Center. The provider is also known as McKnight Pediatrics.

Where is Marjorie B. Mcknight MD PC located?

Marjorie B. Mcknight MD PC is located at 106 Irving St NW Ste 2300, Washington, DC 20010. The listed phone number is (202) 291-6257.

What is Marjorie B. Mcknight MD PC's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Does Marjorie B. Mcknight MD PC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 09D2263580) is associated with this NPI, valid through June 28, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Marjorie B. Mcknight MD PC was last updated on February 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.