Eric H Twerdahl Jr., MD

Primary specialty

Vascular Surgery PhysicianTaxonomy code 2086S0129X

License

35090 Issued in NH

Practice address

1 Medical Center Dr
Lebanon, NH 03756-0001

Phone

(603) 650-5000

NPI assigned

Jun 8, 2010

Sex

Male

Sole proprietor

No

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

Specialties & licenses 4

Addresses

Medicare fee-for-service enrollment

Enrolled in VA, DC, NH3 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

Vascular Surgery

Education

Harvard Medical School, 2010

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Elliot Professional ServicesGroup PAC ID 6103727920, 429 clinicians

Dartmouth-Hitchcock ClinicGroup PAC ID 4183537509, 1,445 clinicians

Mary Hitchcock Memorial HospitalGroup PAC ID 4486561164, 1,269 clinicians

Johns Hopkins Community Physicians, IncGroup PAC ID 8325943707, 764 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mary Hitchcock Memorial Hospital Hospital, Lebanon, NH, CCN 300003
• Elliot Hospital Hospital, Manchester, NH, CCN 300012

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: etwerdahl173574@direct.solutionhealth.org
• Direct secure messaging: etwerdahl1195565@direct.hopkinsmedicine.org
• Direct secure messaging: etwerdahl39111@gwmfa.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 and National Provider Directory roles.

• Elliot Professional Services

  • Internal Medicine Physician
  • Manchester, NH
  • NPI 1285627935
  Medicare reassignment Care Compare group NPD
• Dartmouth-Hitchcock Clinic

  • Internal Medicine Physician
  • Lebanon, NH
  • NPI 1548210198
  Medicare reassignment Care Compare group
• Mary Hitchcock Memorial Hospital

  • General Acute Care Hospital
  • Lebanon, NH
  • NPI 1023092053
  Medicare reassignment Care Compare group
• Johns Hopkins Community Physicians, Inc

  • Internal Medicine Physician
  • Baltimore, MD
  • NPI 1578598868

  DC

  Medicare reassignment Care Compare group
• Johns Hopkins University

  dba Jhu - Transplant/Vascular Surgery

  • Transplant Surgery Physician
  • Baltimore, MD
  • NPI 1124009758

  DC, Vascular Surgery

  Medicare reassignment NPD
• Medical Faculty Associates, Inc

  • Anesthesiology Physician
  • Washington, DC
  • NPI 1417990581

  Surgery

  Medicare reassignment NPD
• University of Virginia Physicians Group

  • Sports Medicine (Neuromusculoskeletal Medicine) Physician
  • Charlottesville, VA
  • NPI 1033138250
  Medicare reassignment NPD
• Johns Hopkins Community Physicians

  dba JHCP- 6225 Smith Avenue; Mental Health Therapy

  • Clinical Social Worker
  • Baltimore, MD
  • NPI 1356161806
  NPD
• Johns Hopkins Community Physicians

  dba JHCP - 4102 Wilson Blvd

  • Internal Medicine Physician
  • Arlington, VA
  • NPI 1902626765
  NPD
• Johns Hopkins Community Physicians, Inc

  • Internal Medicine Physician
  • Baltimore, MD
  • NPI 1255359972
  NPD
• Johns Hopkins University

  dba JHU - 6849 Old Dominion Drive - Physician

  • Neurology Physician
  • McLean, VA
  • NPI 1598552226
  NPD
• Johns Hopkins University

  dba Jhu - Cardiac Surgery

  • Surgery Physician
  • Baltimore, MD
  • NPI 1780665315
  NPD

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

• Elliot Hospital of the City of Manchester

  • General Acute Care Hospital
  • Manchester, NH
  • NPI 1902996028
  Care Compare affiliation
• Mary Hitchcock Memorial Hospital

  • General Acute Care Hospital
  • Lebanon, NH
  • NPI 1023092053
  Care Compare affiliation
• Mary Hitchcock Memorial Hospital

  dba MHMH Regional Services

  • General Acute Care Hospital
  • Lebanon, NH
  • NPI 1629788237
  Care Compare affiliation

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

{
    "created_epoch": "1275955200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779926400000",
    "number": "1093035461",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 810",
            "city": "HANOVER",
            "state": "NH",
            "postal_code": "037550810",
            "telephone_number": "603-308-1467"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 MEDICAL CENTER DR",
            "city": "LEBANON",
            "state": "NH",
            "postal_code": "037560001",
            "telephone_number": "603-650-5000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2150 Pennsylvania Ave NW",
            "address_purpose": "LOCATION",
            "city": "Washington",
            "state": "DC",
            "postal_code": "200373201",
            "country_code": "US",
            "telephone_number": "202-741-3210",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1215 Lee St",
            "address_purpose": "LOCATION",
            "city": "Charlottesville",
            "state": "VA",
            "postal_code": "229080816",
            "country_code": "US",
            "telephone_number": "434-243-1000",
            "fax_number": "434-244-7551",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "8600 Old Georgetown Rd",
            "address_purpose": "LOCATION",
            "city": "Bethesda",
            "state": "MD",
            "postal_code": "208141422",
            "country_code": "US",
            "telephone_number": "301-896-2578",
            "fax_number": "301-897-1378",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "TWERDAHL",
        "first_name": "ERIC",
        "middle_name": "H",
        "name_suffix": "Jr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2010-06-08",
        "last_updated": "2026-05-28",
        "certification_date": "2026-05-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2086S0129X",
            "taxonomy_group": "",
            "desc": "Surgery, Vascular Surgery",
            "state": "DC",
            "license": "MD210001833",
            "primary": false
        },
        {
            "code": "2086S0129X",
            "taxonomy_group": "",
            "desc": "Surgery, Vascular Surgery",
            "state": "NH",
            "license": "35090",
            "primary": true
        },
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "MA",
            "license": "L-244073",
            "primary": false
        },
        {
            "code": "2086S0129X",
            "taxonomy_group": "",
            "desc": "Surgery, Vascular Surgery",
            "state": "VA",
            "license": "0101257909",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Margaret Sundel Turlington
• Win Turner, PHD
• Katherine A Tuthill, APRN
• Georgia A Tuttle, M.D.
• Kelsey Tweed
• Gretchen Elizabeth Twork, M.D.
• Tracy Susan Tylee, M.D.
• Barbara Ann Tyler
• Michelle Diane Tyler, M.D.
• Harmony Lynn Tyner, MD

• Vascular Surgery Physician in Lebanon, NH
• Providers in Lebanon, NH by specialty
• Vascular Surgery Physician in New Hampshire

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 28, 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.