Sydney Caroline Karnovsky

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

1020002 Issued in MA

Practice address

55 Fruit St
Boston, MA 02114-2621

Phone

(617) 726-2000

NPI assigned

Apr 15, 2021

Sex

Female

Sole proprietor

Yes

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

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 1

Specialty

Family PracticeAlso: Sports Medicine

Education

Georgetown University School of Medicine, 2021

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Massachusetts General Physicians Organization IncGroup PAC ID 2466365820, 3,494 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mass General Brigham Home Care, Inc Home health agency, Newton, MA, CCN 227207
• Massachusetts General Hospital Hospital, Boston, MA, CCN 220071
• Brigham and Women'S Hospital Hospital, Boston, MA, CCN 220110
• Newton-Wellesley Hospital Hospital, Newton, MA, CCN 220101
• Spaulding Rehabilitation Hospital Inpatient rehabilitation facility, Charlestown, MA, CCN 223034

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: karnovsky.sydney.mgh@direct.partners.masshiway.net

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.

• Massachusetts General Physicians Organization Inc

  • Dermatology Physician
  • Boston, MA
  • NPI 1801874573
  Medicare reassignment Care Compare group NPD
• The General Hospital Corporation

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1023049236
  Medicare reassignment NPD
• General Hospital Corp

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1508390014
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Mass General Brigham Home Care, Inc.

  • Home Health Agency
  • Newton, MA
  • NPI 1083644017
  Care Compare affiliation Name & address match
• Brigham & Womens Hospital, Inc.

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1790717650
  Care Compare affiliation
• Newton-Wellesley Hospital

  • General Acute Care Hospital
  • Newton, MA
  • NPI 1992737761
  Care Compare affiliation
• The General Hospital Corporation

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1023049236
  Care Compare affiliation
• The Spaulding Rehabilitation Hospital Corporation

  • Rehabilitation Hospital
  • Charlestown, MA
  • NPI 1780600825

  Inpatient rehabilitation facility

  Care Compare affiliation

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

{
    "created_epoch": "1618444800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750291200000",
    "number": "1962083675",
    "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",
            "telephone_number": "617-726-2000"
        },
        {
            "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": "617-726-2000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KARNOVSKY",
        "first_name": "SYDNEY",
        "middle_name": "CAROLINE",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2021-04-15",
        "last_updated": "2025-06-19",
        "certification_date": "2025-06-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "MA",
            "license": "1020002",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Pooja Karnamadakala
• Heidi Elise Karner, RDN
• Linda Elizabeth Karnett, NP
• Ankur Ashok Karnik, MD
• Vikram Karnik
• Brittany Karns, PHARMD
• Matthew Tyler Karofsky
• Audra Karp, C.P.M.
• Lianna Karp, MD
• Rebecca Sara Karp, M.D.

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 19, 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.