NPIMap

Individual provider Active NPI

Jennifer S Gass, MD

  • Hematology & Oncology Physician
  • Providence, RI
National Provider Identifier
1225065139
Registry record updated Feb 16, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hematology & Oncology PhysicianTaxonomy code 207RH0003X
License
MD08540 Issued in RI
Practice address
101 Dudley St
Providence, RI 02905-2401
Phone
(401) 274-1122
NPI assigned
Jun 27, 2006
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 16, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Surgical Oncology Physician 2086X0206X MD08540 RI
Hematology & Oncology Physician 207RH0003X MD08540 RI Primary

Addresses

Primary practice location

101 Dudley St
Providence, RI 02905-2401

Mailing address

455 Toll Gate Rd
PRC and Credentialing
Warwick, RI 02886-2759
Phone (401) 273-0641

Other practice location 1

455 Toll Gate Rd
Warwick, RI 02886-2759
Phone (401) 737-7010

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in RI, MA2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20110120001174 RI Practitioner - Obstetrics/GynecologyPractitioner - Hematology/OncologyPractitioner - Surgical Oncology 2466404264 Reassigns benefits to 1 organization
I20151229000803 MA Practitioner - General SurgeryPractitioner - Surgical Oncology 2466404264 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Obstetrics/GynecologyAlso: Hematology/Oncology, Surgical Oncology
Education
Other, 1987
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Affinity Physicians LLC.Group PAC ID 0244413391, 723 clinicians

Practice addresses (Care Compare)

455 Toll Gate Rd
Warwick, RI 02886-2759
Phone (401) 737-7010

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Mastectomy24
Melanoma (skin cancer) excision1-10

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Wih Faculty Physicians, Inc Obstetrics & Gynecology CurrentSince Nov 1, 2015 Accepting new patients
Affinity Physicians LLC. Hematology & Oncology CurrentSince Jan 1, 2016 Accepting new patients
Affinity Physicians LLC CurrentSince Jan 1, 2016 Accepting new patients
Women & Infants Hospital of Rhode Island Past Accepting new patients

Locations

373 New Boston Rd
Ste 3
Fall River, MA 02720
Phone (508) 235-3500

373 New Boston Rd
Fall River, MA 02720
Phone (508) 679-0054

111 Brewster St
Pawtucket, RI 02860
Phone (401) 729-2000

345 Blackstone Blvd
Providence, RI 02906
Phone (401) 455-6375

101 Dudley St
Fl 3
Providence, RI 02905
Phone (401) 351-5297

101 Dudley St
Providence, RI 02905
Phone (401) 453-7950

455 Toll Gate Rd
Warwick, RI 02886
Phone (401) 737-7000

Interoperability endpoints

  • Direct secure messaging: jgass@direct.carene.org

Organizations & group practices 4

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

Hospital & facility affiliations 7

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1151366400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771200000000",
    "number": "1225065139",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "455 TOLL GATE RD",
            "address_2": "PRC AND CREDENTIALING",
            "city": "WARWICK",
            "state": "RI",
            "postal_code": "028862759",
            "telephone_number": "401-273-0641",
            "fax_number": "401-273-2919"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "101 DUDLEY ST",
            "city": "PROVIDENCE",
            "state": "RI",
            "postal_code": "029052401",
            "telephone_number": "401-274-1122"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "455 Toll Gate Rd",
            "address_purpose": "LOCATION",
            "city": "Warwick",
            "state": "RI",
            "postal_code": "028862759",
            "country_code": "US",
            "telephone_number": "401-737-7010",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GASS",
        "first_name": "JENNIFER",
        "middle_name": "S",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-06-27",
        "last_updated": "2026-02-16",
        "certification_date": "2026-02-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2086X0206X",
            "taxonomy_group": "",
            "desc": "Surgery, Surgical Oncology",
            "state": "RI",
            "license": "MD08540",
            "primary": false
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "RI",
            "license": "MD08540",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Providence, RI

Sources for this page

Verify at the official NPI Registry.