Kelsey Sack, MD/PHD

Primary specialty

Pulmonary Disease PhysicianTaxonomy code 207RP1001X

License

272220 Issued in MA

Practice address

330 Brookline Ave
Boston, MA 02215-5400

Phone

(617) 667-7000

NPI assigned

May 26, 2017

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

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

Internal Medicine

Education

Boston University School of Medicine, 2017

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr IncGroup PAC ID 4486567104, 1,693 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Beth Israel Deaconess Medical Center Hospital, Boston, MA, CCN 220086

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Doctor of Philosophy

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: ksack254221@direct.bilh.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.

• Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1194765438
  Medicare reassignment Care Compare group NPD
• Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

  • Emergency Medicine Physician
  • Boston, MA
  • NPI 1316987993
  NPD
• Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

  • Dermatology Physician
  • Boston, MA
  • NPI 1043250616
  NPD (past)

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

• Beth Israel Deaconess Medical Center, Inc.

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1548202641
  Care Compare affiliation

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

{
    "created_epoch": "1495756800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1762992000000",
    "number": "1710415344",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "330 BROOKLINE AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022155400",
            "telephone_number": "617-667-7000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "330 BROOKLINE AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022155400",
            "telephone_number": "617-667-7000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SACK",
        "first_name": "KELSEY",
        "credential": "MD/PHD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2017-05-26",
        "last_updated": "2025-11-13",
        "certification_date": "2025-11-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RP1001X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Pulmonary Disease",
            "state": "MA",
            "license": "272220",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Emily Sachs
• Gary Steven Sachs, MD
• Jessica A Sachs, M.D.
• Lisa Marie Roy Sachs, NP
• Jordan S Sack, MD, MPH
• Laura Magill Sack, PHD
• Joyce A Sackey, M.D.
• Richard Sacknoff, MD
• Andrea Sacks, MSN, CPNP, RN
• Chana A. Sacks, MD

• Pulmonary Disease Physician in Boston, MA
• Providers in Boston, MA by specialty
• Pulmonary Disease Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 13, 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.