NPIMap

Organization Active NPI

Johns Hopkins University

  • Internal Medicine Physician
  • Baltimore, MD
National Provider Identifier
1679417158
Registry record updated Apr 16, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
Legal business name
JOHNS HOPKINS UNIVERSITY
Practice address
300 Mason Lord Dr
Baltimore, MD 21224-3063
Phone
(410) 933-0000
NPI assigned
Apr 16, 2026
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Apr 16, 2026

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

Authorized official

Name
Nicholas Giarratano
Title
Authorized Official, Jhu
Phone
(410) 933-0000

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine PhysicianGroup: 193200000X MULTI-SPECIALTY GROUP 207R00000X Primary

Addresses

Primary practice location

300 Mason Lord Dr
Baltimore, MD 21224-3063

Mailing address

6201 Greenleigh Ave
Baltimore, MD 21220-2004
Phone (410) 933-6423

Other names 1

  • JHU - 300 MASON LORD DR - PHYSICIAN TYPE - 20 - PHYSICIAN Doing business as

National Provider Directory

National Provider Directory
Tax ID family
Johns Hopkins Univ Emer439 organizations share this tax ID, including this one

Organizations with this tax ID in the same state 24

This tax ID family is large, so up to 24 of its organizations in the same state are linked here.

View all 24

Locations

300 Mason Lord Dr
Baltimore, MD 21224
Phone (410) 550-1711

NPI Registry JSON

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

{
    "created_epoch": "1776297600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1776297600000",
    "number": "1679417158",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6201 GREENLEIGH AVE",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212202004",
            "telephone_number": "410-933-6423"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 MASON LORD DR",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212243063",
            "telephone_number": "410-933-0000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "JOHNS HOPKINS UNIVERSITY",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-04-16",
        "last_updated": "2026-04-16",
        "certification_date": "2026-04-16",
        "status": "A",
        "authorized_official_last_name": "GIARRATANO",
        "authorized_official_first_name": "NICHOLAS",
        "authorized_official_title_or_position": "AUTHORIZED OFFICIAL, JHU",
        "authorized_official_telephone_number": "410-933-0000"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "JHU - 300 MASON LORD DR - PHYSICIAN TYPE - 20 - PHYSICIAN",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Baltimore, MD

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 16, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.