Mark Seeley, MD

Primary specialty

Orthopaedic Surgery PhysicianTaxonomy code 207X00000X

License

MD452143 Issued in PA

Practice address

500 University Dr
Hershey, PA 17033-2360

Phone

(717) 531-5638

Fax

(717) 531-0983

NPI assigned

Jun 17, 2009

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Electronic endpoints 3

Medicare fee-for-service enrollment

Enrolled in PA, DE, LA3 enrollments

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 3

Specialty

Orthopedic Surgery

Education

Other, 2009

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Tidalhealth Physician Network, Inc.Group PAC ID 7315901253, 115 clinicians

Geisinger ClinicGroup PAC ID 5395657001, 3,432 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Geisinger Medical Center Hospital, Danville, PA, CCN 390006
• Tidalhealth Nanticoke, Inc. Hospital, Seaford, DE, CCN 080006

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mseeley5297271@direct.casso.us.com
• Direct secure messaging: mseeley46805@direct.conemaugh.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.

• Geisinger Clinic

  • Family Medicine Physician
  • Danville, PA
  • NPI 1366493868
  Medicare reassignment Care Compare group NPD
• Tidalhealth Physician Network, Inc.

  • Family Medicine Physician
  • Seaford, DE
  • NPI 1467534636
  Medicare reassignment Care Compare group NPD
• DLP Conemaugh Physician Practices LLC

  • Family Medicine Physician
  • Cresson, PA
  • NPI 1932515905
  Medicare reassignment NPD
• Geisinger-HM Joint Venture, LLC

  • Family Medicine Physician
  • Lock Haven, PA
  • NPI 1144876137
  Medicare reassignment NPD
• The Milton S Hershey Medical Center Physicians Group

  • Orthopaedic Surgery Physician
  • Hershey, PA
  • NPI 1710951744
  Medicare reassignment NPD
• Our Lady of the Lake Physician Group LLC

  • Internal Medicine Physician
  • Baton Rouge, LA
  • NPI 1033494943
  Medicare reassignment NPD
• DLP Conemaugh Physician Practices LLC

  • Internal Medicine Physician
  • Johnstown, PA
  • NPI 1205242609
  NPD
• Geisinger Clinic

  • Pediatrics Physician
  • Mountain Top, PA
  • NPI 1538445218
  NPD
• Geisinger Clinic

  • Diagnostic Radiology Physician
  • Danville, PA
  • NPI 1558313023
  NPD
• Geisinger-HM Joint Venture, LLC

  • Family Medicine Physician
  • Williamsport, PA
  • NPI 1073075909
  NPD
• Geisinger-HM Joint Venture, LLC

  • Family Medicine Physician
  • Lock Haven, PA
  • NPI 1427604222
  NPD
• The Milton S Hershey Medical Center Physician Group

  • Body Imaging Physician
  • Hershey, PA
  • NPI 1346215928
  NPD

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

• Geisinger Medical Center

  • Clinic/Center
  • Pottsville, PA
  • NPI 1003170937

  Hospital

  Care Compare affiliation
• Geisinger Medical Center

  • General Acute Care Hospital
  • Danville, PA
  • NPI 1013384809
  Care Compare affiliation
• Geisinger Medical Center

  • General Acute Care Hospital
  • Coal Township, PA
  • NPI 1033491741
  Care Compare affiliation
• Geisinger Medical Center

  • Clinic/Center
  • Shamokin, PA
  • NPI 1063708501

  Hospital

  Care Compare affiliation
• Geisinger Medical Center

  • Clinic/Center
  • Danville, PA
  • NPI 1093555120

  Hospital

  Care Compare affiliation
• Geisinger Medical Center

  • Clinic/Center
  • Danville, PA
  • NPI 1104682061

  Hospital

  Care Compare affiliation
• Geisinger Medical Center

  • Psychiatric Hospital Unit
  • Danville, PA
  • NPI 1144301102
  Care Compare affiliation
• Geisinger Medical Center

  • General Acute Care Hospital
  • Lewisburg, PA
  • NPI 1154617694
  Care Compare affiliation
• Geisinger Medical Center

  • General Acute Care Hospital
  • Danville, PA
  • NPI 1235215427
  Care Compare affiliation
• Geisinger Medical Center

  • Clinic/Center
  • Elysburg, PA
  • NPI 1245632231

  Hospital

  Care Compare affiliation
• Geisinger Medical Center

  • General Acute Care Hospital
  • Danville, PA
  • NPI 1275832164
  Care Compare affiliation
• Geisinger Medical Center

  • General Acute Care Hospital
  • Selinsgrove, PA
  • NPI 1275850620
  Care Compare affiliation

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

{
    "created_epoch": "1245196800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1780963200000",
    "number": "1891922894",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "500 UNIVERSITY DR MC CA410",
            "city": "HERSHEY",
            "state": "PA",
            "postal_code": "170332360",
            "telephone_number": "717-531-5208",
            "fax_number": "717-531-0119"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "500 UNIVERSITY DR",
            "city": "HERSHEY",
            "state": "PA",
            "postal_code": "170332360",
            "telephone_number": "717-531-5638",
            "fax_number": "717-531-0983"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "8200 Constantin Blvd Fl 1",
            "address_purpose": "LOCATION",
            "city": "Baton Rouge",
            "state": "LA",
            "postal_code": "708093481",
            "country_code": "US",
            "telephone_number": "225-765-5500",
            "fax_number": "225-374-1670",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "16 Woodbine Lane",
            "address_purpose": "LOCATION",
            "city": "Danville",
            "state": "PA",
            "postal_code": "178228029",
            "country_code": "US",
            "telephone_number": "570-271-6700",
            "fax_number": "570-214-6700",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SEELEY",
        "first_name": "MARK",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2009-06-17",
        "last_updated": "2026-06-09",
        "certification_date": "2026-06-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "PA",
            "license": "MD452143",
            "primary": true
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "MI",
            "license": "4301094371",
            "primary": false
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "LA",
            "license": "343500",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mseeley126767@direct.geisinger.edu",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "16 Woodbine Lane",
            "city": "Danville",
            "state": "PA",
            "country_code": "US",
            "postal_code": "178228029",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0830.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "N",
            "endpointDescription": "FMOLHS FHIR URL",
            "use": "OTHER",
            "useDescription": "Other",
            "useOtherDescription": "FHIR API",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "C-CDA",
            "address_1": "8200 Constantin Blvd Fl 1",
            "city": "Baton Rouge",
            "state": "LA",
            "country_code": "US",
            "postal_code": "708093481",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mseeley5297271@direct.casso.us.com",
            "affiliation": "N",
            "endpointDescription": "FMOLHS-Epic",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "mseeley5297271@direct.casso.us.com",
            "address_1": "8200 Constantin Blvd Fl 1",
            "city": "Baton Rouge",
            "state": "LA",
            "country_code": "US",
            "postal_code": "708093481",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Avery Quinn Scripture, DO
• Tyler William Seal
• Annette Seaman, PHARMD
• Joni Mariah Seeberger
• Alec Walden Seei, DO
• Patricia Seeley, RPH
• Joseph Robert Seemiller
• Samantha Sefick, DO
• Sydney Anne Segin, PA-C
• Sabreen Sehgal, CRNP

• Orthopaedic Surgery Physician in Hershey, PA
• Providers in Hershey, PA by specialty
• Orthopaedic Surgery Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 9, 2026; 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.