Individual provider Active NPI

Karen R Balestrieri, PNP-C

  • Pediatric Nurse Practitioner
  • Boston, MA
National Provider Identifier
1437148236
Registry record updated Jun 11, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Pediatric Nurse PractitionerTaxonomy code 363LP0200X
License
RN237567 Issued in MA
Practice address
300 Longwood Ave
Boston, MA 02115-5724
Phone
(617) 355-6000
NPI assigned
Oct 14, 2005
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 11, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Pediatric Nurse Practitioner 363LP0200X RN237567 MA Primary

Addresses

Primary practice location

300 Longwood Ave
Boston, MA 02115-5724

Mailing address

300 Longwood Ave
Boston, MA 02115-5724
Phone (617) 355-6000

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: No
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20140828000214 MA Practitioner - Nurse Practitioner 5597929919 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Nurse Practitioner
Education
Other, 2001
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Pediatrics West PCGroup PAC ID 0143448514, 15 clinicians

Practice addresses (Care Compare)

120 Boston Rd
Suite 1
Groton, MA 01450-1860
Phone (978) 577-0437

133 Littleton Rd
Suite 101
Westford, MA 01886-3198
Phone (978) 577-0437

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Nurse Practitioner

Practice roles

OrganizationSpecialtyStatusNew patients
Pediatrics West, PC CurrentSince Jun 7, 2014 Accepting new patients
Emerson Hospital Current Accepting new patients
Child and Family Psychological Services, PLLC PastSince Jun 15, 2020 Accepting new patients
Specialty West PLLC Past Accepting new patients

Locations

120 Boston Rd
Ste 1
Groton, MA 01450
Phone (978) 577-0437

133 Littleton Rd
Ste 101
Westford, MA 01886
Phone (978) 577-0437

133 Littleton Rd
Ste 103
Westford, MA 01886
Phone (978) 619-5447

Interoperability endpoints

  • Direct secure messaging: balestrieri.karen.epho@direct.partners.masshiway.net

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.

NPI Registry JSON

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

{
    "created_epoch": "1129248000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781136000000",
    "number": "1437148236",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 LONGWOOD AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021155724",
            "telephone_number": "617-355-6000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 LONGWOOD AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021155724",
            "telephone_number": "617-355-6000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BALESTRIERI",
        "first_name": "KAREN",
        "middle_name": "R",
        "credential": "PNP-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2005-10-14",
        "last_updated": "2026-06-11",
        "certification_date": "2026-06-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LP0200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Pediatrics",
            "state": "MA",
            "license": "RN237567",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

Verify at the official NPI Registry.