NPIMap

Individual provider Active NPI

Wei Sum Li, M.D.

  • Internal Medicine Physician
  • Charlestown, MA
National Provider Identifier
1629425046
Registry record updated Oct 2, 2022
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
283634 Issued in MA
Practice address
73 High St
Charlestown, MA 02129-3026
Phone
(617) 724-8135
NPI assigned
May 16, 2016
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Oct 2, 2022

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

Specialties & licenses 4

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X MD16644 RI
Addiction Medicine (Internal Medicine) Physician 207RA0401X 283634 MA
Internal Medicine Physician 207R00000X 283634 MA Primary
Internal Medicine Physician 207R00000X LP03593 RI

Addresses

Primary practice location

73 High St
Charlestown, MA 02129-3026

Mailing address

73 High St
Charlestown, MA 02129-3026
Phone (617) 724-8135

Other practice location 1

55 Fruit St
Boston, MA 02114-2621
Phone (617) 726-3557

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in RI, MA2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20190516002130 RI Practitioner - Internal Medicine 3476848631
I20220512001479 MA Practitioner - Internal Medicine 3476848631 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
University of Massachusetts Medical School, 2016
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
The General Hospital CorporationGroup PAC ID 6507803806, 1,275 clinicians

Practice addresses (Care Compare)

55 Fruit St
Boston, MA 02114-2621
Phone (617) 726-2000

55 Fruit St
Boston, MA 02114-2696
Phone (617) 724-0287

Hospital & facility affiliations

  • Mass General Brigham Home Care, Inc Home health agency, Newton, MA, CCN 227207
  • Massachusetts General Hospital Hospital, Boston, MA, CCN 220071
  • Wentworth-Douglass Hospital Hospital, Dover, NH, CCN 300018
  • Massachusetts Eye and Ear Infirmary - Hospital, Boston, MA, CCN 220075
  • North Shore Medical Center - Hospital, Salem, MA, CCN 220035
  • Spaulding Rehabilitation Hospital Inpatient rehabilitation facility, Charlestown, MA, CCN 223034

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
The General Hospital Corporation CurrentSince Feb 3, 2022 Accepting new patients
General Hospital Corp Current Accepting new patients
Brigham & Womens Physicians Organization Inc Internal Medicine CurrentSince Oct 20, 2025 Accepting new patients
Massachusetts General Physicians Organization Inc Internal Medicine CurrentSince Feb 3, 2022 Accepting new patients
Brigham and Womens Physicians Organization Inc Past Accepting new patients

Locations

75 Francis St
Boston, MA 02115

55 Fruit St
Boston, MA 02114

55 Fruit St
#2
Boston, MA 02114
Phone (617) 726-2967

73 High St
Charlestown, MA 02129
Phone (617) 724-8135

1153 Centre St
Jamaica Plain, MA 02130
Phone (617) 983-7000

Interoperability endpoints

  • Direct secure messaging: li.weisum.mgh@direct.partners.masshiway.net

Organizations & group practices 5

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 7

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": "1463356800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1664668800000",
    "number": "1629425046",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "73 HIGH ST",
            "city": "CHARLESTOWN",
            "state": "MA",
            "postal_code": "021293026",
            "telephone_number": "617-724-8135"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "73 HIGH ST",
            "city": "CHARLESTOWN",
            "state": "MA",
            "postal_code": "021293026",
            "telephone_number": "617-724-8135"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "55 Fruit St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021142621",
            "country_code": "US",
            "telephone_number": "617-726-3557",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LI",
        "first_name": "WEI SUM",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2016-05-16",
        "last_updated": "2022-10-02",
        "certification_date": "2022-10-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "RI",
            "license": "MD16644",
            "primary": false
        },
        {
            "code": "207RA0401X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Addiction Medicine",
            "state": "MA",
            "license": "283634",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "283634",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "RI",
            "license": "LP03593",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Charlestown, MA

Sources for this page

Verify at the official NPI Registry.