Gavin Martin Gassen, M.D.

Primary specialty

Otolaryngology PhysicianTaxonomy code 207Y00000X

License

338537 Issued in NY

Practice address

21 Reade PL Ste 3200
Poughkeepsie, NY 12601-3944

Phone

(845) 471-4086

Fax

(845) 471-8296

NPI assigned

Jan 23, 2006

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

Medicare fee-for-service enrollment

Enrolled in VI, LA, OK, NY4 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 4

Specialty

Otolaryngology

Education

Tulane University School of Medicine, 1992

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

St. John Physicians, Inc. 262 clinicians

ENT and Allergy Associates LLP 431 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Vassar Brothers Medical Center Hospital, Poughkeepsie, NY, CCN 330023
• Northern Dutchess Hospital Hospital, Rhinebeck, NY, CCN 330049
• Ascension St John Medical Center Hospital, Tulsa, OK, CCN 370114

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: gavin.gassen@direct.entandallergy.nextgenshare.com
• FHIR API: https://fhir.nextgen.com/nge/prod/fhir-api-r4/fhir/r4/
• Direct secure messaging: gavingassen@vient.allscriptsdirect.net

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.

• ENT and Allergy Associates LLP

  • Otolaryngology Physician
  • Tarrytown, NY
  • NPI 1376598326

  NY, Otolaryngology

  Medicare reassignment Care Compare group NPD
• St. John Physicians, Inc.

  • Internal Medicine Physician
  • Tulsa, OK
  • NPI 1336194406

  OK

  Medicare reassignment Care Compare group NPD
• Administrators of the Tulane Educational Fund

  • Specialist
  • New Orleans, LA
  • NPI 1528014164

  LA

  Medicare reassignment NPD
• Plessen ENT

  • Otolaryngology Physician
  • Christiansted, VI
  • NPI 1609515394

  Otolaryngology, VI

  Medicare reassignment NPD
• Plessen Medical Group, LLC

  • Multi-Specialty Clinic/Center
  • Christiansted, VI
  • NPI 1821331133

  VI

  Medicare reassignment NPD
• St. John Physicians, Inc

  • Rural Health Clinic/Center
  • Barnsdall, OK
  • NPI 1033176367
  Care Compare group NPD
• St. John Physicians, Inc

  • Rural Health Clinic/Center
  • Coffeyville, KS
  • NPI 1669792818
  Care Compare group
• St. John Physicians, Inc

  • Rural Health Clinic/Center
  • Caney, KS
  • NPI 1912961418
  Care Compare group
• Administrators of the Tulane Educational Fund

  • Specialist
  • Hattiesburg, MS
  • NPI 1033395298
  NPD
• Plessen Medical Group, LLC

  • Urgent Care Clinic/Center
  • Christiansted, VI
  • NPI 1225639412
  NPD
• Paradise Surgical, LLC

  • Ambulatory Surgical Clinic/Center
  • St Thomas, VI
  • NPI 1568700284
  NPD (past)

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

• Northern Dutchess Hospital

  • General Acute Care Hospital
  • Rhinebeck, NY
  • NPI 1124072715

  Hospital

  Care Compare affiliation
• Vassar Brothers Hospital

  • General Acute Care Hospital
  • Poughkeepsie, NY
  • NPI 1740233899

  Hospital

  Care Compare affiliation
• Vassar Brothers Medical Center

  • Clinical Medical Laboratory
  • Poughkeepsie, NY
  • NPI 1780052514

  Hospital

  Care Compare affiliation
• St John Medical Center Inc

  • General Acute Care Hospital
  • Tulsa, OK
  • NPI 1154417368

  Hospital

  Care Compare affiliation
• St John Medical Center Inc

  • Rehabilitation Hospital Unit
  • Tulsa, OK
  • NPI 1578656161

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1137974400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757980800000",
    "number": "1508836636",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "660 WHITE PLAINS RD STE 400",
            "city": "TARRYTOWN",
            "state": "NY",
            "postal_code": "105915107",
            "telephone_number": "914-984-2546"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "21 READE PL STE 3200",
            "city": "POUGHKEEPSIE",
            "state": "NY",
            "postal_code": "126013944",
            "telephone_number": "845-471-4086",
            "fax_number": "845-471-8296"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GASSEN",
        "first_name": "GAVIN",
        "middle_name": "MARTIN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-01-23",
        "last_updated": "2025-09-16",
        "certification_date": "2025-09-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Y00000X",
            "taxonomy_group": "",
            "desc": "Otolaryngology",
            "state": "NY",
            "license": "338537",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Domonique Mishel Garrett
• Whitney Alexandra Garritt, MSW
• Evan Garry, MD
• Padmavati Garvey, MD
• Julie Lynn Gasparri, M.S.ED., CCC-SLP
• Gastroenterology Associates
• Gastroenterology Medical Group, PC
• Joel Gatchalian, DDS
• Melanie Elizabeth Gates
• Shawn Elizabeth Gates, PMHNP

• All providers in Poughkeepsie, NY
• Otolaryngology Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 16, 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.