Steven Nicholas Baldassano, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

284140 Issued in MA

Practice address

55 Fruit St
Boston, MA 02114-2696

Phone

(617) 726-2000

NPI assigned

Mar 30, 2020

Last updated

May 16, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in MA, NH2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Diagnostic Radiology

Education

Perelman School of Med at the University of Pennsylvania, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Atrius Health IncGroup PAC ID 4789588641, 1,214 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

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

• Atrius Health, Inc.

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1871639914
  Medicare reassignment Care Compare group NPD
• Massachusetts General Physicians Organization Inc

  • Dermatology Physician
  • Boston, MA
  • NPI 1801874573

  Internal Medicine, NH

  Medicare reassignment NPD
• The General Hospital Corporation

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1023049236
  Medicare reassignment NPD
• Atrius Health, Inc.

  dba Harvard Vanguard Medical Associates

  • Internal Medicine Physician
  • Watertown, MA
  • NPI 1043366537
  NPD
• Atrius Health, Inc.

  dba Harvard Vanguard Medical Associates

  • Internal Medicine Physician
  • Beverly, MA
  • NPI 1114265634
  NPD

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

{
    "created_epoch": "1585526400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1747353600000",
    "number": "1417585076",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2014 WASHINGTON ST",
            "city": "NEWTON",
            "state": "MA",
            "postal_code": "024621699",
            "telephone_number": "617-243-6467",
            "fax_number": "617-243-6701"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "55 FRUIT ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021142696",
            "telephone_number": "617-726-2000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2014 Washington St",
            "address_purpose": "LOCATION",
            "city": "Newton",
            "state": "MA",
            "postal_code": "024621699",
            "country_code": "US",
            "telephone_number": "617-243-6467",
            "fax_number": "617-243-6701",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BALDASSANO",
        "first_name": "STEVEN",
        "middle_name": "NICHOLAS",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-03-30",
        "last_updated": "2025-05-16",
        "certification_date": "2025-05-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "NU",
            "license": null,
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "284140",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Angela Balas
• Ravikumar Balasubramanian, M.D.
• Varshini Balasubramanian
• Soleen Balata
• Tracy A Balboni, M.D., M.P.H.
• Johanna P Baldassari, NP
• Nicholas Ray Baldelli
• Elizabeth H Baldini, MD , MPH
• Christian Aurelio Baldino, LMHC
• Annmarie Baldwin, NP-C

• Internal Medicine Physician in Boston, MA
• Providers in Boston, MA by specialty
• Internal Medicine Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 16, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.