NPIMap

Individual provider Active NPI

Jason G. Barrera, MD, PHD

  • Internal Medicine Physician
  • Boston, MA
National Provider Identifier
1770879231
Registry record updated Feb 10, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
256717 Issued in MA
Practice address
165 Cambridge St FL 5
Boston, MA 02114-2759
Phone
(617) 726-4900
NPI assigned
Jun 23, 2011
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 10, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 256717 MA Primary

Addresses

Primary practice location

165 Cambridge St FL 5
Boston, MA 02114-2759

Mailing address

165 Cambridge St FL 5
Boston, MA 02114-2759
Phone (617) 726-4900

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20140620000628 MA Practitioner - Internal Medicine 3577724962 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
University of Cincinnati College of Medicine, 2011
Medicare assignment
May accept Medicare assignment
Telehealth
Offers telehealth services
Group practices
The General Hospital CorporationGroup PAC ID 6507803806, 1,275 clinicians
Massachusetts General Physicians Organization IncGroup PAC ID 2466365820, 3,494 clinicians

Practice addresses (Care Compare)

55 Fruit St
Boston, MA 02114-2621
Phone (617) 726-2000

55 Fruit St
Boston, MA 02114-2696
Phone (617) 724-0287

Hospital & facility affiliations

  • Mass General Brigham Home Care, Inc Home health agency, Newton, MA, CCN 227207
  • Massachusetts General Hospital Hospital, Boston, MA, CCN 220071
  • North Shore Medical Center - Hospital, Salem, MA, CCN 220035
  • Brigham and Women'S Hospital Hospital, Boston, MA, CCN 220110
  • Massachusetts Eye and Ear Infirmary - Hospital, Boston, MA, CCN 220075
  • Newton-Wellesley Hospital Hospital, Newton, MA, CCN 220101
  • Spaulding Rehabilitation Hospital Inpatient rehabilitation facility, Charlestown, MA, CCN 223034

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
General Hospital Corp Current Accepting new patients
The General Hospital Corporation CurrentSince Jul 1, 2014 Accepting new patients
Massachusetts General Physicians Organization Inc Internal Medicine CurrentSince Jul 1, 2014 Accepting new patients

Locations

55 Fruit St
#2
Boston, MA 02114
Phone (617) 726-2967

55 Fruit St
Boston, MA 02114

165 Cambridge St
Fl 5
Boston, MA 02114
Phone (617) 726-4600

Interoperability endpoints

  • Direct secure messaging: barrera.jason.mgh@direct.partners.masshiway.net

Organizations & group practices 3

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": "1308787200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770681600000",
    "number": "1770879231",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "165 CAMBRIDGE ST FL 5",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021142759",
            "telephone_number": "617-726-4900"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "165 CAMBRIDGE ST FL 5",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021142759",
            "telephone_number": "617-726-4900"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BARRERA",
        "first_name": "JASON",
        "middle_name": "G.",
        "credential": "MD, PHD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2011-06-23",
        "last_updated": "2026-02-10",
        "certification_date": "2026-02-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "256717",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

Verify at the official NPI Registry.