Individual provider Active NPI

Alexander Tang, MD

  • Pediatrics Physician
  • Boston, MA
National Provider Identifier
1821652520
Registry record updated Dec 17, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Pediatrics PhysicianTaxonomy code 208000000X
License
1014701 Issued in MA
Practice address
300 Longwood Ave
Boston, MA 02115-5724
Phone
(617) 355-6000
NPI assigned
Apr 28, 2019
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Dec 17, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Pediatrics Physician 208000000X 1014701 MA Primary

Addresses

Primary practice location

300 Longwood Ave
Boston, MA 02115-5724

Mailing address

300 Longwood Ave
Boston, MA 02115-5724
Phone (617) 355-6000

Other practice location 1

600 N Wolfe St
Baltimore, MD 21287-0005
Phone (410) 955-2000

Other practice location 2

1 Illini Dr
Peoria, IL 61605-2576
Phone (309) 671-3000

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
1014701MAMDPediatrics Physician

Interoperability endpoints

  • Direct secure messaging: atang31215@direct.bostonchildrens.org

NPI Registry JSON

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

{
    "created_epoch": "1556409600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765929600000",
    "number": "1821652520",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 LONGWOOD AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021155724",
            "telephone_number": "617-355-6000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 LONGWOOD AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021155724",
            "telephone_number": "617-355-6000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "600 N Wolfe St",
            "address_purpose": "LOCATION",
            "city": "Baltimore",
            "state": "MD",
            "postal_code": "212870005",
            "country_code": "US",
            "telephone_number": "410-955-2000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1 Illini Dr",
            "address_purpose": "LOCATION",
            "city": "Peoria",
            "state": "IL",
            "postal_code": "616052576",
            "country_code": "US",
            "telephone_number": "309-671-3000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "TANG",
        "first_name": "ALEXANDER",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2019-04-28",
        "last_updated": "2025-12-17",
        "certification_date": "2025-12-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "MA",
            "license": "1014701",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 17, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.