Margaret Ann Maher, PHD, RDN

Primary specialty

Registered DietitianTaxonomy code 133V00000X

License

1551 Issued in NH

Practice address

621 Science Dr
Madison, WI 53711-1074

Phone

(608) 265-8303

NPI assigned

Jun 6, 2024

Sex

Female

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in NH

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Philosophy

State licenses

Practice roles

Locations

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.

• Dartmouth-Hitchcock Clinic

  • Internal Medicine Physician
  • Lebanon, NH
  • NPI 1548210198
  Medicare reassignment NPD
• Mary Hitchcock Memorial Hospital

  • General Acute Care Hospital
  • Lebanon, NH
  • NPI 1023092053
  Medicare reassignment NPD
• Dartmouth-Hitchcock Clinic

  dba The Doorway at Dartmouth-Hitchcock Lebanon

  • Substance Use Disorder Rehabilitation Clinic/Center
  • Lebanon, NH
  • NPI 1124681846
  NPD
• Mary Hitchcock Memorial Hospital

  dba Hampstead Hospital

  • Psychiatric Hospital
  • Hampstead, NH
  • NPI 1699584219
  NPD
• Fay Nutrition

  • Registered Dietitian
  • San Francisco, CA
  • NPI 1104334465

  Dietitian, Registered

  NPD (past)

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

{
    "created_epoch": "1717632000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776643200000",
    "number": "1548002074",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "430 CHERRY HILL DR",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537172653",
            "telephone_number": "608-498-1542"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "621 SCIENCE DR",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537111074",
            "telephone_number": "608-265-8303"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MAHER",
        "first_name": "MARGARET",
        "middle_name": "ANN",
        "name_prefix": "Dr.",
        "credential": "PHD, RDN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2024-06-06",
        "last_updated": "2026-04-20",
        "certification_date": "2026-04-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "133V00000X",
            "taxonomy_group": "",
            "desc": "Dietitian, Registered",
            "state": "WI",
            "license": "1953",
            "primary": false
        },
        {
            "code": "133V00000X",
            "taxonomy_group": "",
            "desc": "Dietitian, Registered",
            "state": "RI",
            "license": "LDN01294",
            "primary": false
        },
        {
            "code": "133V00000X",
            "taxonomy_group": "",
            "desc": "Dietitian, Registered",
            "state": "NH",
            "license": "1551",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Aparna Mahajan, MBBS
• Arnav Mahajan
• Samantha Arezoo Mahajan, OD
• Molly Elizabeth Mahan, PHARMD
• Lynnae Marie Mahaney, RPH
• Michael Allen Maher, NP
• Peter A Mahler, MD PHD
• Jeffrey James Mahlum, MD
• Maryam Mahmood, DO
• Charlotte Mahoney-Mosedale, B.A.

• Registered Dietitian in Madison, WI
• Providers in Madison, WI by specialty
• Registered Dietitian in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 20, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.