Lily Grossmann, M.D.

Primary specialty

Epilepsy PhysicianTaxonomy code 2084E0001X

License

280792 Issued in MA

Practice address

800 Washington St
Boston, MA 02111-1552

Phone

(617) 636-5356

NPI assigned

Mar 27, 2014

Sex

Female

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

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

Specialty

EpileptologistsAlso: Neurology, Pediatric Medicine

Education

State University of New York Downstate Medical Center, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Massachusetts General Physicians Organization IncGroup PAC ID 2466365820, 3,494 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: lgrossmann29150@tuftsmedicine.direct-ci.com
• Direct secure messaging: grossmann.lily.mgh@direct.partners.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.

• Massachusetts General Physicians Organization Inc

  • Dermatology Physician
  • Boston, MA
  • NPI 1801874573
  Medicare reassignment Care Compare group NPD
• The General Hospital Corporation

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1023049236
  Medicare reassignment NPD
• General Hospital Corp

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1508390014
  NPD

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

{
    "created_epoch": "1395878400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1745280000000",
    "number": "1871910711",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "800 WASHINGTON ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021111552",
            "telephone_number": "617-646-5356"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "800 WASHINGTON ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021111552",
            "telephone_number": "617-636-5356"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "55 Fruit St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021142621",
            "country_code": "US",
            "telephone_number": "617-724-6400",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GROSSMANN",
        "first_name": "LILY",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2014-03-27",
        "last_updated": "2025-04-22",
        "certification_date": "2025-04-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084N0402X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology with Special Qualifications in Child Neurology",
            "state": "MA",
            "license": "266851",
            "primary": false
        },
        {
            "code": "2084E0001X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Epilepsy",
            "state": "MA",
            "license": "280792",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mila Nehls Grossman
• Neil J Grossman, MD
• Nicole Landzberg Grossman, MD
• Shamai A. Grossman, MD
• Stephanie L. Grossman, PH.D.
• Andrew D Grotzinger, BA
• Ground & Growth PLLC
• Groundinghearts Wellness & Counseling, LLC
• Groundinghearts, Inc
• Stefania Grous, DMD

• Epilepsy Physician in Boston, MA
• Providers in Boston, MA by specialty
• Epilepsy Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 22, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.