Benjamin Edmund Landwersiek, MD

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

1020436 Issued in MA

Practice address

1493 Cambridge St
Cambridge, MA 02139-1099

Phone

(617) 665-1000

NPI assigned

Mar 25, 2021

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Opted out of Medicare

Yes, effective Dec 17, 2025 through Dec 17, 2027

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: blandwersiek99759@direct.challiance.masshiway.net

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.

• Cambridge Public Health Commission

  dba Cambridge Health Alliance

  • General Acute Care Hospital
  • Cambridge, MA
  • NPI 1487603585
  NPD
• Aster Mental Health Inc

  • Psychiatry Physician
  • Braintree, MA
  • NPI 1437760907
  NPD (past)

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

{
    "created_epoch": "1616630400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750636800000",
    "number": "1386221513",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1493 CAMBRIDGE ST",
            "city": "CAMBRIDGE",
            "state": "MA",
            "postal_code": "021391099",
            "telephone_number": "617-665-1000"
        },
        {
            "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": [],
    "basic": {
        "last_name": "LANDWERSIEK",
        "first_name": "BENJAMIN",
        "middle_name": "EDMUND",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-03-25",
        "last_updated": "2025-06-23",
        "certification_date": "2025-06-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "MA",
            "license": null,
            "primary": false
        },
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "MA",
            "license": "1020436",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Elaine Landes, NP
• Maryellen A Landino, RN
• Denise Landrigan, APRN
• Alexis Landry, DPT
• Patti A Landry, OD
• Annabel Lane
• Carol M Lane, MSW, LICSW
• Kelley Lane
• Kelsey White Lane, M.D.
• Kumaran David Lane, DPT

• Psychiatry Physician in Cambridge, MA
• Providers in Cambridge, MA by specialty
• Psychiatry Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 23, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Opt Out Affidavits.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.