Mark Massak, D.O.

Primary specialty

Vascular & Interventional Radiology PhysicianTaxonomy code 2085R0204X

License

OS020464 Issued in PA

Practice address

12 St. Paul Drive
Wellspan Radiology
Chambersburg, PA 17201-1035

Phone

(717) 217-6026

NPI assigned

Jun 18, 2013

Last updated

Feb 2, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Electronic endpoints 1

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

Interventional RadiologyAlso: Diagnostic Radiology

Education

Lake Erie College of Osteopathic Medicine, Erie, 2013

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Wellspan Medical GroupGroup PAC ID 1951213115, 2,438 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Wellspan Chambersburg Hospital Hospital, Chambersburg, PA, CCN 390151
• Wellspan Waynesboro Hospital Hospital, Waynesboro, PA, CCN 390138
• Wellspan York Hospital Hospital, York, PA, CCN 390046
• Gettysburg Hospital Hospital, Gettysburg, PA, CCN 390065
• Meritus Medical Center Hospital, Hagerstown, MD, CCN 210001

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mmassak123474@direct.geisinger.edu
• Direct secure messaging: mmassak370642@wellspan.direct-ci.com

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Wellspan Medical Group

  dba WellSpan Digestive Health

  • Gastroenterology Physician
  • York, PA
  • NPI 1669770004
  Medicare reassignment Care Compare group NPD
• Geisinger Clinic

  • Family Medicine Physician
  • Danville, PA
  • NPI 1366493868
  Medicare reassignment NPD
• Geisinger-HM Joint Venture, LLC

  dba Geisinger Medical Clinic Lock Haven

  • Family Medicine Physician
  • Lock Haven, PA
  • NPI 1144876137

  Diagnostic Radiology

  Medicare reassignment NPD
• Radiance Med Spa

  • Vascular & Interventional Radiology Physician
  • Chambersburg, PA
  • NPI 1225996812
  NPD Authorized official
• Geisinger Clinic

  • Diagnostic Radiology Physician
  • Danville, PA
  • NPI 1558313023
  NPD
• Geisinger Clinic

  dba PrimeMed Medical Grp Scranton in collaboration w/Geisinger Clinic

  • Family Medicine Physician
  • Scranton, PA
  • NPI 1770990160
  NPD
• Geisinger-HM Joint Venture, LLC

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

  • Gastroenterology Physician
  • Montoursville, PA
  • NPI 1396207015
  NPD
• Wellspan Medical Group

  dba WellSpan Pediatric Surgical Specialist

  • Pediatric Surgery Physician
  • York, PA
  • NPI 1104799428
  NPD
• Wellspan Medical Group

  dba WellSpan Family Medicine - Suite 203

  • Family Medicine Physician
  • Chambersburg, PA
  • NPI 1386350866
  NPD

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

• The Chambersburg Hospital

  dba WellSpan Chambersburg Hospital

  • Clinic/Center
  • Chambersburg, PA
  • NPI 1215060157

  Hospital

  Care Compare affiliation
• The Chambersburg Hospital

  dba WellSpan Chambersburg Hospital

  • Clinic/Center
  • Chambersburg, PA
  • NPI 1669523320

  Hospital

  Care Compare affiliation
• The Chambersburg Hospital

  dba WellSpan Chambersburg Hospital

  • General Acute Care Hospital
  • Chambersburg, PA
  • NPI 1902804552
  Care Compare affiliation
• The Chambersburg Hospital

  dba WellSpan Chambersburg Hospital

  • Clinic/Center
  • Chambersburg, PA
  • NPI 1952452617

  Hospital

  Care Compare affiliation
• The Gettysburg Hospital

  dba WellSpan Gettysburg Hospital SPU

  • Ambulatory Surgical Clinic/Center
  • Gettysburg, PA
  • NPI 1184882011

  Hospital

  Care Compare affiliation
• The Gettysburg Hospital

  • General Acute Care Hospital
  • Gettysburg, PA
  • NPI 1265466957
  Care Compare affiliation
• Waynesboro Hospital

  dba WellSpan Waynesboro

  • Clinic/Center
  • Waynesboro, PA
  • NPI 1083780894

  Hospital

  Care Compare affiliation
• Waynesboro Hospital

  dba WellSpan Waynesboro Hospital

  • Clinic/Center
  • Fayetteville, PA
  • NPI 1306989561

  Hospital

  Care Compare affiliation
• Waynesboro Hospital

  dba WellSpan Waynesboro Hospital

  • General Acute Care Hospital
  • Waynesboro, PA
  • NPI 1821091059
  Care Compare affiliation
• York Hospital

  • General Acute Care Hospital
  • York, PA
  • NPI 1326060492
  Care Compare affiliation
• York Hospital

  dba York Hospital Community Health Center

  • Clinic/Center
  • York, PA
  • NPI 1497814040

  Hospital

  Care Compare affiliation
• York Hospital

  dba WellSpan York Hospital OB/GYN

  • Clinic/Center
  • York, PA
  • NPI 1609112036

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1371513600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769990400000",
    "number": "1952740532",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "601 MEMORY LN",
            "city": "YORK",
            "state": "PA",
            "postal_code": "174022231"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "12 ST. PAUL DRIVE",
            "address_2": "WELLSPAN RADIOLOGY",
            "city": "CHAMBERSBURG",
            "state": "PA",
            "postal_code": "172011035",
            "telephone_number": "717-217-6026"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "36 Robinhood Dr",
            "address_purpose": "LOCATION",
            "city": "Etters",
            "state": "PA",
            "postal_code": "173199528",
            "country_code": "US",
            "telephone_number": "717-388-7300",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "252 S 4th St",
            "address_purpose": "LOCATION",
            "city": "Lebanon",
            "state": "PA",
            "postal_code": "170426111",
            "country_code": "US",
            "telephone_number": "717-270-7732",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "112 North 7th Street",
            "address_2": "WellSpan Radiology",
            "address_purpose": "LOCATION",
            "city": "Chambersburg",
            "state": "PA",
            "postal_code": "172011720",
            "country_code": "US",
            "telephone_number": "717-262-4499",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "460 N Reading Rd",
            "address_purpose": "LOCATION",
            "city": "Ephrata",
            "state": "PA",
            "postal_code": "175229606",
            "country_code": "US",
            "telephone_number": "717-721-4840",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "169 Martin Ave",
            "address_purpose": "LOCATION",
            "city": "Ephrata",
            "state": "PA",
            "postal_code": "175221734",
            "country_code": "US",
            "telephone_number": "717-738-6414",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1201 Letort Springs Way",
            "address_purpose": "LOCATION",
            "city": "Carlisle",
            "state": "PA",
            "postal_code": "170158011",
            "country_code": "US",
            "telephone_number": "717-674-7600",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "147 Gettys St",
            "address_purpose": "LOCATION",
            "city": "Gettysburg",
            "state": "PA",
            "postal_code": "173252534",
            "country_code": "US",
            "telephone_number": "717-337-4207",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "35 Monument Rd Ste 201",
            "address_purpose": "LOCATION",
            "city": "York",
            "state": "PA",
            "postal_code": "174035074",
            "country_code": "US",
            "telephone_number": "717-812-4083",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "14781 Wolfe Rd",
            "address_purpose": "LOCATION",
            "city": "New Freedom",
            "state": "PA",
            "postal_code": "173499571",
            "country_code": "US",
            "telephone_number": "717-326-1880",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MASSAK",
        "first_name": "MARK",
        "name_prefix": "Dr.",
        "credential": "D.O.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-06-18",
        "last_updated": "2026-02-02",
        "certification_date": "2026-02-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0204X",
            "taxonomy_group": "",
            "desc": "Radiology, Vascular & Interventional Radiology",
            "state": "PA",
            "license": "OS020464",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mmassak123474@direct.geisinger.edu",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "400 Highland Ave",
            "city": "Lewistown",
            "state": "PA",
            "country_code": "US",
            "postal_code": "170441167",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• David G Marx, MD
• Mary Marzouk, CRNP
• Matthew Maserati, MD
• Mason Dixon Healthcare, LLC (CareMinders Home Care)
• Danielle R Mason, PA-C
• Scott Thomas Massey, M.D.
• Sara Jean Massimilla
• Kati A Masters, CRNP
• Matthew Mastiano
• Andrew Mathew, DO

• Vascular & Interventional Radiology Physician in Chambersburg, PA
• Providers in Chambersburg, PA by specialty
• Vascular & Interventional Radiology Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 2, 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.