Individual provider Active NPI

Kareem El-Tayeb, MD

  • Anesthesiology Physician
  • Cambridge, MA
National Provider Identifier
1245817899
Registry record updated Jun 24, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Anesthesiology PhysicianTaxonomy code 207L00000X
License
1020908 Issued in MA
Practice address
1493 Cambridge St
Cambridge, MA 02139-1099
Phone
(617) 665-1000
NPI assigned
Mar 28, 2021
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Jun 24, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Student in an Organized Health Care Education/Training Program 390200000X
Anesthesiology Physician 207L00000X 1020908 MA Primary

Addresses

Primary practice location

1493 Cambridge St
Cambridge, MA 02139-1099

Mailing address

38 Lawrence St Apt 4
Boston, MA 02116-6053
Phone (619) 397-8155

Other practice location 1

75 Francis St
Boston, MA 02115-6110
Phone (617) 732-4840

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
I20250711002058 MA Practitioner - Anesthesiology 2264947092 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Anesthesiology
Education
Tufts University School of Medicine, 2021
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Lawrence Anesthesia Services LLCGroup PAC ID 4082770136, 127 clinicians

Practice addresses (Care Compare)

1493 Cambridge St
Cambridge, MA 02139-1047
Phone (617) 665-1000

Hospital & facility affiliations

  • Cambridge Health Alliance Hospital, Cambridge, MA, CCN 220011

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
1020908MAMDAnesthesiology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Lawrence Anesthesia Services, LLC Anesthesiology CurrentSince Jul 1, 2025 Accepting new patients
Cambridge Public Health Commission Current Accepting new patients
Gbaa Holdings, PLLC Anesthesiology CurrentSince Oct 1, 2025 Accepting new patients

Locations

45 Discovery Way
#A
Acton, MA 01720
Phone (617) 936-7683

1493 Cambridge St
Cambridge, MA 02139
Phone (617) 665-1185

103 Garland St
Everett, MA 02149
Phone (617) 381-7150

123 Summer St
Worcester, MA 01608
Phone (508) 363-6000

Interoperability endpoints

  • Direct secure messaging: keltayeb124401@direct.challiance.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 2

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": "1616889600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782259200000",
    "number": "1245817899",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "38 LAWRENCE ST APT 4",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021166053",
            "telephone_number": "619-397-8155"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1493 CAMBRIDGE ST",
            "city": "CAMBRIDGE",
            "state": "MA",
            "postal_code": "021391099",
            "telephone_number": "617-665-1000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "75 Francis St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021156110",
            "country_code": "US",
            "telephone_number": "617-732-4840",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "EL-TAYEB",
        "first_name": "KAREEM",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2021-03-28",
        "last_updated": "2026-06-24",
        "certification_date": "2026-06-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "MA",
            "license": "1020908",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Cambridge, MA

Sources for this page

Verify at the official NPI Registry.