Marjorie B. McKnight MD PC

Primary specialty

Pediatrics PhysicianTaxonomy code 208000000X

Legal business name

MARJORIE B. MCKNIGHT MD PC

Doing business as

Zarminali Pediatrics
Zarminali Pediatrics - Hospital Center

Practice address

106 Irving St NW Ste 2300
Washington, DC 20010-2959

Phone

(202) 291-6257

Fax

(202) 726-4926

NPI assigned

Aug 9, 2023

Last updated

Feb 20, 2026By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Mr. Kyle Anthony Butler-Myers

Title

Practice Manager

Phone

(202) 829-2984

Specialties & licenses 2

Addresses

Other names 3

• Zarminali Pediatrics Doing business as
• Zarminali Pediatrics - Hospital Center Doing business as
• McKnight Pediatrics Other name

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

Locations

Practitioners 2

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

• Hugh Calkins, M.D.

  • Pediatrics Physician
  • Washington, DC
  • NPI 1083152003
  NPD (past)
• Melissa Williams, MD

  • Pediatrics Physician
  • Washington, DC
  • NPI 1194288845
  NPD (past)

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

{
    "created_epoch": "1691539200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1771545600000",
    "number": "1245913052",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "106 IRVING ST NW STE 2300",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200102959",
            "telephone_number": "202-291-6257",
            "fax_number": "202-726-4926"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "106 IRVING ST NW STE 2300",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200102959",
            "telephone_number": "202-291-6257",
            "fax_number": "202-726-4926"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "106 Irving St NW Ste 2600",
            "address_purpose": "LOCATION",
            "city": "Washington",
            "state": "DC",
            "postal_code": "200102962",
            "country_code": "US",
            "telephone_number": "202-291-6257",
            "fax_number": "202-726-4926",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "organization_name": "MARJORIE B. MCKNIGHT MD PC",
        "organizational_subpart": "NO",
        "enumeration_date": "2023-08-09",
        "last_updated": "2026-02-20",
        "certification_date": "2026-02-20",
        "status": "A",
        "authorized_official_last_name": "BUTLER-MYERS",
        "authorized_official_first_name": "KYLE",
        "authorized_official_middle_name": "ANTHONY",
        "authorized_official_title_or_position": "PRACTICE MANAGER",
        "authorized_official_telephone_number": "202-829-2984",
        "authorized_official_name_prefix": "Mr."
    },
    "taxonomies": [
        {
            "code": "101YP2500X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Counselor, Professional",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "208000000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Pediatrics",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Zarminali Pediatrics",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "Zarminali Pediatrics - Hospital Center",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "McKnight Pediatrics",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

• Gustavo Alfonso Marino, M.D.
• Philip Marion, MD
• Mariposa Therapy & Assessment, PLLC
• Nura Mariscal del Moral, PT, DPT
• Marissa R. O'Malia PC
• Marjul Homes Inc.
• Mark M. Sklar, M.D., PLLC
• Princess Essi Mark-Adjeli, M.D.
• Anthony Leary Mark, M.D.
• Jeremy Mark

• Pediatrics Physician in Washington, DC
• Providers in Washington, DC by specialty
• Pediatrics Physician in District of Columbia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 20, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• 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.

Verify at the official NPI Registry.