NPIMap

Organization Active NPI

Johns Hopkins University

Doing business as Jhu - 301 Mason Lord Dr Ste 3300 - Provider Type: 20-Physician

  • Internal Medicine Physician
  • Baltimore, MD
National Provider Identifier
1891658332
Registry record updated Dec 3, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
Legal business name
JOHNS HOPKINS UNIVERSITY
Doing business as
Jhu - 301 Mason Lord Dr Ste 3300 - Provider Type: 20-Physician
Practice address
301 Mason Lord Dr Ste 3300
Baltimore, MD 21224-3057
Phone
(410) 550-2400
Fax
(410) 550-1137
NPI assigned
Dec 3, 2025
Last updated
Dec 3, 2025By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Dec 3, 2025

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

Authorized official

Name
Nicholas Giarratano
Title
Director, Provider Enrollment
Phone
(410) 933-0000

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X NU Primary

Addresses

Primary practice location

301 Mason Lord Dr Ste 3300
Baltimore, MD 21224-3057

Mailing address

6201 Greenleigh Ave
Middle River, MD 21220-2004
Phone (410) 933-0000

Other names 1

  • JHU - 301 MASON LORD DR STE 3300 - PROVIDER TYPE: 20-PHYSICIAN Doing business as

National Provider Directory

National Provider Directory
Tax ID family
Johns Hop Univ Inter Me439 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

301 Mason Lord Dr
Ste 3300
Baltimore, MD 21224
Phone (410) 550-2400

NPI Registry JSON

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

{
    "created_epoch": "1764720000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1764720000000",
    "number": "1891658332",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6201 GREENLEIGH AVE",
            "city": "MIDDLE RIVER",
            "state": "MD",
            "postal_code": "212202004",
            "telephone_number": "410-933-0000",
            "fax_number": "410-500-4266"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "301 MASON LORD DR STE 3300",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212243057",
            "telephone_number": "410-550-2400",
            "fax_number": "410-550-1137"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "JOHNS HOPKINS UNIVERSITY",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-12-03",
        "last_updated": "2025-12-03",
        "certification_date": "2025-12-03",
        "status": "A",
        "authorized_official_last_name": "GIARRATANO",
        "authorized_official_first_name": "NICHOLAS",
        "authorized_official_title_or_position": "DIRECTOR, PROVIDER ENROLLMENT",
        "authorized_official_telephone_number": "410-933-0000"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NU",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "JHU - 301 MASON LORD DR STE 3300 - PROVIDER 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 Dec 3, 2025; 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.