NPIMap

Individual provider Active NPI

Ole-Petter Riksfjord Hamnvik, M.D.

  • Endocrinology, Diabetes & Metabolism Physician
  • Boston, MA
National Provider Identifier
1063603678
Registry record updated Apr 2, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Endocrinology, Diabetes & Metabolism PhysicianTaxonomy code 207RE0101X
License
239696 Issued in MA
Practice address
55 Fruit St
Boston, MA 02114-2621
Phone
(617) 724-3782
NPI assigned
Aug 8, 2007
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Apr 2, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Endocrinology, Diabetes & Metabolism Physician 207RE0101X 239696 MA Primary
Internal Medicine Physician 207R00000X 239696 MA

Addresses

Primary practice location

55 Fruit St
Boston, MA 02114-2621

Mailing address

221 Longwood Ave
RFB-2
Boston, MA 02115-5804
Phone (617) 732-5666

Other practice location 1

221 Longwood Ave
RFB-2
Boston, MA 02115-5804
Phone (617) 732-5666

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
I20120719000449 MA Practitioner - EndocrinologyPractitioner - Internal Medicine 2466618400 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
EndocrinologyAlso: Internal Medicine
Education
Other, 2005
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices

Practice addresses (Care Compare)

221 Longwood Ave
Boston, MA 02115-5804
Phone (617) 732-5500

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
239696MAMDEndocrinology, Diabetes & Metabolism Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Brigham & Womens Physicians Organization Inc Internal Medicine CurrentSince May 30, 2015 Accepting new patients
Brigham and Women'S Hospital Current Accepting new patients
Dana-Farber Cancer Institute, Inc. CurrentSince Apr 30, 2015 Accepting new patients
Dana-Farber Cancer Institute, Inc. CurrentSince Apr 30, 2015 Accepting new patients

Locations

450 Brookline Ave
Boston, MA 02215
Phone (508) 478-2061

221 Longwood Ave
#2
Boston, MA 02115
Phone (617) 732-5661

75 Francis St
Boston, MA 02115

221 Longwood Ave
Boston, MA 02115
Phone (617) 732-4918

55 Fruit St
Boston, MA 02114

254 2nd Ave
Ste 100
Needham Heights, MA 02494
Phone (781) 416-8412

Interoperability endpoints

  • Direct secure messaging: hamnvik.ole-petter.bwh@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.

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": "1186531200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775088000000",
    "number": "1063603678",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "221 LONGWOOD AVE",
            "address_2": "RFB-2",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021155804",
            "telephone_number": "617-732-5666",
            "fax_number": "617-525-4036"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "55 FRUIT ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021142621",
            "telephone_number": "617-724-3782"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "221 Longwood Ave",
            "address_2": "RFB-2",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021155804",
            "country_code": "US",
            "telephone_number": "617-732-5666",
            "fax_number": "617-525-4036",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HAMNVIK",
        "first_name": "OLE-PETTER",
        "middle_name": "RIKSFJORD",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-08-08",
        "last_updated": "2026-04-02",
        "certification_date": "2026-04-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RE0101X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Endocrinology, Diabetes & Metabolism",
            "state": "MA",
            "license": "239696",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "239696",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

Verify at the official NPI Registry.