Mary F. Callahan, M.D.

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

MD037354E Issued in PA

Practice address

2520 Green Tech Dr
Ste D
State College, PA 16803-2300

Phone

(814) 234-5021

Fax

(814) 235-3313

NPI assigned

Feb 22, 2006

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

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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.

• Geisinger Clinic

  • Family Medicine Physician
  • Danville, PA
  • NPI 1366493868
  NPD
• Geisinger Clinic

  dba PrimeMed Medical Grp Clark Summit in collaboration w/Geisinger Clinic

  • Family Medicine Physician
  • Clarks Summit, PA
  • NPI 1952719619
  NPD

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

{
    "created_epoch": "1140566400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1275508194",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "100 N ACADEMY AVE",
            "city": "DANVILLE",
            "state": "PA",
            "postal_code": "178223034",
            "telephone_number": "570-271-6144",
            "fax_number": "570-271-6578"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2520 GREEN TECH DR",
            "address_2": "STE D",
            "city": "STATE COLLEGE",
            "state": "PA",
            "postal_code": "168032300",
            "telephone_number": "814-234-5021",
            "fax_number": "814-235-3313"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CALLAHAN",
        "first_name": "MARY",
        "middle_name": "F.",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-02-22",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "PA",
            "license": "MD037354E",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• James A Cady, PA-C
• Cairn Wellness
• David Michael Calandra, DC
• Manuella Calderon
• Lindsey Calhoun
• Edward C Camacho, DC
• Meredith Camp
• Campbell-Pine,PC
• Emily Campbell, MS, ATC
• Robert Paul Campbell, DMD

• Family Medicine Physician in State College, PA
• Providers in State College, PA by specialty
• Family Medicine Physician in Pennsylvania

• 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.