NPIMap

Individual provider Active NPI

Douglas S Micalizzi, MD, PHD

  • Medical Oncology Physician
  • Boston, MA
National Provider Identifier
1356604037
Registry record updated Dec 31, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Medical Oncology PhysicianTaxonomy code 207RX0202X
License
258808 Issued in MA
Practice address
55 Fruit St
Boston, MA 02114-2621
Phone
(855) 776-4224
NPI assigned
Jun 19, 2012
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 31, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Hematology & Oncology Physician 207RH0003X 258808 MA
Medical Oncology Physician 207RX0202X 258808 MA Primary

Addresses

Primary practice location

55 Fruit St
Boston, MA 02114-2621

Mailing address

55 Fruit St
Boston, MA 02114-2621

Other practice location 1

75 Francis St
Boston, MA 02115-6110
Phone (617) 732-5500

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
I20180730003207 MA Practitioner - Medical OncologyPractitioner - Internal Medicine 1658525183 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Medical OncologyAlso: Internal Medicine
Education
University of Colorado School of Medicine, Denver, 2012
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
The General Hospital CorporationGroup PAC ID 6507803806, 1,275 clinicians

Practice addresses (Care Compare)

40 2ND Ave
Waltham, MA 02451-1132
Phone (781) 487-2900

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

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

75 Francis St
Boston, MA 02115-6110
Phone (617) 732-5500

Hospital & facility affiliations

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
The General Hospital Corporation CurrentSince Sep 1, 2018 Accepting new patients
General Hospital Corp Current Accepting new patients
Brigham & Womens Physicians Organization Inc CurrentSince Dec 23, 2025 Accepting new patients
Massachusetts General Physicians Organization Inc CurrentSince Sep 1, 2018 Accepting new patients

Locations

55 Fruit St
Boston, MA 02114

75 Francis St
Boston, MA 02115

55 Fruit St
Ste 7E
Boston, MA 02114
Phone (617) 643-0237

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

Interoperability endpoints

  • Direct secure messaging: micalizzi.douglas.mgh@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 5

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": "1340064000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767139200000",
    "number": "1356604037",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "55 FRUIT ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021142621"
        },
        {
            "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": "855-776-4224"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "75 Francis St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021156110",
            "country_code": "US",
            "telephone_number": "617-732-5500",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MICALIZZI",
        "first_name": "DOUGLAS",
        "middle_name": "S",
        "credential": "MD, PHD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2012-06-19",
        "last_updated": "2025-12-31",
        "certification_date": "2025-12-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "MA",
            "license": "258808",
            "primary": false
        },
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "MA",
            "license": "258808",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

Verify at the official NPI Registry.