Cynthia Anne Korzelius, M.D.

Primary specialty

Nephrology PhysicianTaxonomy code 207RN0300X

License

156597 Issued in MA

Practice address

2014 Washington St
Newton Wellesley Hospital, Hospitalist Suite, 2 North
Newton, MA 02462-1607

Phone

(617) 243-6433

Fax

(617) 243-5148

NPI assigned

Feb 26, 2006

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 7

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

NephrologyAlso: Internal Medicine

Education

Johns Hopkins University School of Medicine, 1996

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Mass General Brigham Medical Group Suburban Massachusetts IncGroup PAC ID 0244133494, 534 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Newton-Wellesley Hospital Hospital, Newton, MA, CCN 220101

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: korzelius.cynthia.nwh@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.

• Mass General Brigham Medical Group Suburban Massachusetts Inc

  • Family Medicine Physician
  • Newton, MA
  • NPI 1538191218
  Medicare reassignment Care Compare group NPD
• Newton Wellesley Hospital

  • General Acute Care Hospital
  • Newton, MA
  • NPI 1952845521
  NPD
• Newton-Wellesley Hospital

  • General Acute Care Hospital
  • Newton, MA
  • NPI 1992737761
  NPD (past)

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

• Newton-Wellesley Hospital

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

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

{
    "created_epoch": "1140912000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1932175379",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2014 WASHINGTON ST # 2N",
            "city": "NEWTON",
            "state": "MA",
            "postal_code": "024621607",
            "telephone_number": "617-243-6433",
            "fax_number": "617-243-5148"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2014 WASHINGTON ST",
            "address_2": "NEWTON WELLESLEY HOSPITAL, HOSPITALIST SUITE, 2 NORTH",
            "city": "NEWTON",
            "state": "MA",
            "postal_code": "024621607",
            "telephone_number": "617-243-6433",
            "fax_number": "617-243-5148"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KORZELIUS",
        "first_name": "CYNTHIA",
        "middle_name": "ANNE",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-02-26",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "156597",
            "primary": false
        },
        {
            "code": "207RN0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Nephrology",
            "state": "MA",
            "license": "156597",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "HARVARD PILGRIM",
            "identifier": "AA15334",
            "state": "MA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "3191214",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "AETNA",
            "identifier": "3571773",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "SIGNA",
            "identifier": "9414827",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS MEDEX",
            "identifier": "J19912",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "TUFTS HEALTH PLAN",
            "identifier": "403159",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "HEALTHSOURCE",
            "identifier": "3127888",
            "state": "MA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Jonathan Hill Kopchick, CRNA
• Julia Ann Koretski
• Rebecca S. Kornblatt, PSY.D.
• George D Kornitzer, MD
• Kenneth Shyer Kornman, DDS
• Jesse Donald Kosiba, PH.D.
• Annika Lowrey Kossayda
• Christine Kostoroski
• Kelsey Kourafas
• Chryssanthi Kournioti, M.D.

• Nephrology Physician in Newton, MA
• Providers in Newton, MA by specialty
• Nephrology Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 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.