Individual provider Active NPI

Mara Lorenzi, MD

  • Clinical Pathology/Laboratory Medicine Physician
  • Boston, MA
National Provider Identifier
1023099470
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical Pathology/Laboratory Medicine PhysicianTaxonomy code 207ZP0105X
License
59231 Issued in MA
Practice address
50 Staniford St
3Rd Floor S50 3 Diabetes Unit
Boston, MA 02114-2517
Phone
(617) 726-8722
Fax
(617) 724-8534
NPI assigned
Nov 10, 2005
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical Pathology/Laboratory Medicine Physician 207ZP0105X 59231 MA Primary

Addresses

Primary practice location

50 Staniford St
3Rd Floor S50 3 Diabetes Unit
Boston, MA 02114-2517

Mailing address

PO Box 9142
Mass General Physician Organization
Charlestown, MA 02129-9142
Phone (617) 724-0287

Other identifiers 3

IdentifierTypeStateIssuer
773885OtherMATUFTS HEALTH PLAN
J18353OtherMABCBS MA
3170284MedicaidMA

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)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
59231MAMDClinical Pathology/Laboratory Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Massachusetts General Physicians Organization Inc PastSince Jan 1, 2026 Accepting new patients
North Suburban Orthopedic Associates, Inc. Past Accepting new patients

Organizations & group practices 2

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.

NPI Registry JSON

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

{
    "created_epoch": "1131580800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1023099470",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 9142",
            "address_2": "MASS GENERAL PHYSICIAN ORGANIZATION",
            "city": "CHARLESTOWN",
            "state": "MA",
            "postal_code": "021299142",
            "telephone_number": "617-724-0287",
            "fax_number": "617-726-2894"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "50 STANIFORD ST",
            "address_2": "3RD FLOOR S50 3 DIABETES UNIT",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021142517",
            "telephone_number": "617-726-8722",
            "fax_number": "617-724-8534"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LORENZI",
        "first_name": "MARA",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2005-11-10",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207ZP0105X",
            "taxonomy_group": "",
            "desc": "Pathology, Clinical Pathology/Laboratory Medicine",
            "state": "MA",
            "license": "59231",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "TUFTS HEALTH PLAN",
            "identifier": "773885",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBS MA",
            "identifier": "J18353",
            "state": "MA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "3170284",
            "state": "MA"
        }
    ],
    "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 Jul 13, 2026; 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.