Alison Lee Mercier, MD

Primary specialty

Geriatric Medicine (Family Medicine) PhysicianTaxonomy code 207QG0300X

License

MD486393 Issued in PA

Practice address

2112 Harrisburg Pike
Ste 312
Lancaster, PA 17601-2644

Phone

(802) 999-6433

NPI assigned

Jun 21, 2018

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in PA

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

Family Practice

Education

Other, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Lancaster General HospitalGroup PAC ID 1254240039, 520 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Choices Healthcare Hospice, Lancaster, PA, CCN 391515
• Lancaster General Hospital Hospital, Lancaster, PA, CCN 390100
• Trillium Place Nursing home, Lancaster, PA, CCN 395559

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: amercier261123@direct-lghealth.org

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.

• Lancaster General Hospital

  • Radiation Oncology Physician
  • Lancaster, PA
  • NPI 1720430812
  Medicare reassignment Care Compare group NPD
• Lancaster General Hospital

  • Gastroenterology Physician
  • Lancaster, PA
  • NPI 1205691912
  NPD
• Lancaster General Hospital

  • Family Medicine Physician
  • Quarryville, PA
  • NPI 1255352092
  NPD
• University of Vermont Medical Center Inc

  • Internal Medicine Physician
  • Burlington, VT
  • NPI 1659309615

  Family Medicine

  NPD
• Lancaster General Medical Group

  • Family Medicine Physician
  • East Petersburg, PA
  • NPI 1083600290
  NPD (past)
• The Mennonite Home

  • Skilled Nursing Facility
  • Lancaster, PA
  • NPI 1770558512
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Choices Healthcare

  • Community Based Hospice Care Agency
  • Lancaster, PA
  • NPI 1750389193
  Care Compare affiliation
• Lancaster General Hospital

  • General Acute Care Hospital
  • Lancaster, PA
  • NPI 1104875103
  Care Compare affiliation
• Lancaster General Hospital

  • General Acute Care Hospital
  • Parkesburg, PA
  • NPI 1245571942
  Care Compare affiliation
• Lancaster General Hospital

  • Ambulatory Surgical Clinic/Center
  • Lancaster, PA
  • NPI 1538290424

  Hospital

  Care Compare affiliation
• The Mennonite Home

  • Skilled Nursing Facility
  • Lancaster, PA
  • NPI 1770558512

  Nursing home

  Care Compare affiliation

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

{
    "created_epoch": "1529539200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1811481997",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2112 HARRISBURG PIKE",
            "address_2": "STE 312",
            "city": "LANCASTER",
            "state": "PA",
            "postal_code": "176012644",
            "telephone_number": "802-999-6433"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2112 HARRISBURG PIKE",
            "address_2": "STE 312",
            "city": "LANCASTER",
            "state": "PA",
            "postal_code": "176012644",
            "telephone_number": "802-999-6433"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MERCIER",
        "first_name": "ALISON",
        "middle_name": "LEE",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2018-06-21",
        "last_updated": "2025-09-11",
        "certification_date": "2024-11-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207QG0300X",
            "taxonomy_group": "",
            "desc": "Family Medicine, Geriatric Medicine",
            "state": "PA",
            "license": "MD486393",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mental Health America of Lancaster County
• Adam Mentzer, MSW
• Deborah A Mentzer, CRNP, PMH
• Sarah Mentzer, RDH
• Tyler Kendrick Merceron, MD
• Olga A Merdiuszew, O.D.
• Thomas Walter Meredith
• Veronica Merelo Alcocer, MD
• Bianca Linda Meridionale, OT
• Destinee Merrick

• Geriatric Medicine (Family Medicine) Physician in Lancaster, PA
• Providers in Lancaster, PA by specialty
• Geriatric Medicine (Family Medicine) Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 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.