NPIMap

Organization Active NPI

Johns Hopkins University

  • Nephrology Physician
  • Baltimore, MD
National Provider Identifier
1972463149
Registry record updated Nov 12, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Nephrology PhysicianTaxonomy code 207RN0300X
Legal business name
JOHNS HOPKINS UNIVERSITY
Practice address
301 Mason Lord Dr Ste 3400
Baltimore, MD 21224-3057
Phone
(410) 550-0526
NPI assigned
Nov 12, 2025
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Nov 12, 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
Nephrology PhysicianGroup: 193200000X MULTI-SPECIALTY GROUP 207RN0300X Primary

Addresses

Primary practice location

301 Mason Lord Dr Ste 3400
Baltimore, MD 21224-3057

Mailing address

6201 Greenleigh Ave
Middle River, MD 21220-2004
Phone (410) 550-0526

Other names 1

  • JHU-301 MASON LORD DR STE 3400 - PROVIDER 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 23

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

View all 23

Locations

301 Mason Lord Dr
Ste 3400
Baltimore, MD 21224
Phone (410) 550-0526

NPI Registry JSON

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

{
    "created_epoch": "1762905600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1762905600000",
    "number": "1972463149",
    "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": "410-550-0526",
            "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 3400",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212243057",
            "telephone_number": "410-550-0526"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "JOHNS HOPKINS UNIVERSITY",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-11-12",
        "last_updated": "2025-11-12",
        "certification_date": "2025-11-12",
        "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": "207RN0300X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Nephrology",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "JHU-301 MASON LORD DR STE 3400 - 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 Nov 12, 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.