Individual provider Active NPI

Leah Elizabeth Sax, MD

  • Otolaryngology Physician
  • Boston, MA
National Provider Identifier
1326508144
Registry record updated Sep 22, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Otolaryngology PhysicianTaxonomy code 207Y00000X
License
1024096 Issued in MA
Practice address
243 Charles St
Boston, MA 02114-3002
Phone
(617) 573-3557
Fax
(617) 573-3626
NPI assigned
Mar 20, 2019
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 22, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Otolaryngology Physician 207Y00000X MD219311 OR
Otolaryngology Physician 207Y00000X 1024096 MA Primary

Addresses

Primary practice location

243 Charles St
Boston, MA 02114-3002

Mailing address

243 Charles St
Boston, MA 02114-3002
Phone (617) 573-3557

Medicare participation

Medicare enrollment files
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

Enrollment IDStateProvider typePAC IDDetails
I20250916003981 MA Practitioner - Otolaryngology 9032444245 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Otolaryngology
Education
Boston University School of Medicine, 2019
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices

Practice addresses (Care Compare)

243 Charles St
Boston, MA 02114-3002
Phone (617) 523-7900

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
99.11 of 100Reported as apm
Quality
84.29
Promoting interoperability
100
Improvement activities
40

Procedures performed for Medicare patients

ProcedureNumber of procedures
Upper gastrointestinal (GI) endoscopy for acid reflux1-10
Removal of skin lesions1-10

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
1024096MAMDOtolaryngology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Massachusetts Eye and Ear Infirmary Current Accepting new patients
Massachusetts Eye and Ear Associates, Inc. Otolaryngology CurrentSince Sep 22, 2025 Accepting new patients
Evms Academic Physicians and Surgeons Health Services Foundation Otolaryngology Past Accepting new patients

Locations

243 Charles St
Boston, MA 02114
Phone (617) 523-7900

300 Crown Colony Dr
Ste 201
Quincy, MA 02169
Phone (617) 573-3135

Interoperability endpoints

  • Direct secure messaging: sax.leah.meei@direct.partners.masshiway.net

Organizations & group practices 3

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": "1553040000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1758499200000",
    "number": "1326508144",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "243 CHARLES ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021143002",
            "telephone_number": "617-573-3557",
            "fax_number": "617-573-3626"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "243 CHARLES ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021143002",
            "telephone_number": "617-573-3557",
            "fax_number": "617-573-3626"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SAX",
        "first_name": "LEAH",
        "middle_name": "ELIZABETH",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2019-03-20",
        "last_updated": "2025-09-22",
        "certification_date": "2025-09-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Y00000X",
            "taxonomy_group": "",
            "desc": "Otolaryngology",
            "state": "OR",
            "license": "MD219311",
            "primary": false
        },
        {
            "code": "207Y00000X",
            "taxonomy_group": "",
            "desc": "Otolaryngology",
            "state": "MA",
            "license": "1024096",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

Verify at the official NPI Registry.