NPIMap

Organization Active NPI

Johns Hopkins University

Doing business as Jhu - Oncology

  • Medical Oncology Physician
  • Baltimore, MD
National Provider Identifier
1902896970
Registry record updated Oct 9, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Medical Oncology PhysicianTaxonomy code 207RX0202X
Legal business name
JOHNS HOPKINS UNIVERSITY
Doing business as
Jhu - Oncology
Practice address
600 N Wolfe St
Baltimore, MD 21287-0005
Phone
(410) 933-7400
NPI assigned
Oct 21, 2005
Last updated
Oct 9, 2026By the provider in NPPES
Organization subpart
Yes
Parent organization
JOHNS HOPKINS UNIVERSITYAs reported in NPPES

NPPES NPI Registry

Updated by the provider on Oct 9, 2026

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
Medical Oncology Physician 207RX0202X MD Primary

Addresses

Primary practice location

600 N Wolfe St
Baltimore, MD 21287-0005

Mailing address

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

Other practice location 1

10803 Falls Road, Pavilion 3
Suite 1500
Lutherville, MD 21093
Phone (410) 583-2978

Other identifiers 3

IdentifierTypeStateIssuer
318681400MedicaidMD
067208400MedicaidDC
CA9018OtherMDRRMC

Other names 1

  • JHU - ONCOLOGY Doing business as

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MD, DC3 enrollments

Enrollment records 3

Enrollment IDStateProvider typePAC IDDetails
O20031215000719 MD Part B Supplier - Clinic/Group Practice 8921903147 Receives reassigned benefits from 4,764 practitioners
This NPI is an additional NPI on the enrollment
O20110506000067 DC Part B Supplier - Clinic/Group Practice 1052223229 Receives reassigned benefits from 18 practitioners
8 other NPIs on this enrollment
This NPI is an additional NPI on the enrollment
Practice locations: Baltimore, MD; Washington, DC; Rockville, MD; Bethesda, MD
O20121031000132 DC Part B Supplier - Clinic/Group Practice 1052223229 Receives reassigned benefits from 74 practitioners
1 other NPI on this enrollment
Practice locations: Bethesda, MD; Washington, DC

Other NPIs with the same Medicare PAC ID 22

NPIs whose Medicare enrollments share a PECOS associate control ID (the same enrolled entity).

View all 22

Other NPIs on the same Medicare enrollment 8

NPIs listed together on one Medicare enrollment, typically parts of the same organization.

National Provider Directory

National Provider Directory
Part of
John Hopkins Univ

Member organizations 5

Organizations listed as members of this organization in the National Provider Directory.

Practitioners & affiliated clinicians

Practitioners 260

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.

View all 260

NPI Registry JSON

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

{
    "created_epoch": "1129852800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1791504000000",
    "number": "1902896970",
    "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": "600 N WOLFE ST",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212870005",
            "telephone_number": "410-933-7400"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "10803 Falls Road, Pavilion 3",
            "address_2": "Suite 1500",
            "address_purpose": "LOCATION",
            "city": "Lutherville",
            "state": "MD",
            "postal_code": "21093",
            "country_code": "US",
            "telephone_number": "410-583-2978",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "organization_name": "JOHNS HOPKINS UNIVERSITY",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "JOHNS HOPKINS UNIVERSITY",
        "enumeration_date": "2005-10-21",
        "last_updated": "2026-10-09",
        "certification_date": "2026-10-05",
        "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": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "MD",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "318681400",
            "state": "MD"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "067208400",
            "state": "DC"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RRMC",
            "identifier": "CA9018",
            "state": "MD"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "JHU - ONCOLOGY",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "JHU - ONCOLOGY",
            "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 Oct 9, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.