Quick answers
- Which hospitals does Gavin M. Gassen work at?
- Medicare's official clinician data lists Gavin M. Gassen at 3 hospitals: Northern Dutchess Hospital, Vassar Brothers Medical Center and Westchester Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gavin M. Gassen see patients?
- Medicare's clinician data lists 5 practice locations, including Tulsa, OK and Poughkeepsie, NY. Call before your visit to confirm the address.
- What is Gavin M. Gassen's specialty?
- Medicare lists Otolaryngology as the primary specialty.
- Does Gavin M. Gassen accept Medicare assignment?
- Yes. Medicare's clinician data says Gavin M. Gassen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Gavin M. Gassen?
- (918) 744-2071, as listed in official Medicare / NPI Registry data.
- What is Gavin M. Gassen's NPI number?
- 1508836636. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gavin M. Gassen works
Medicare's Facility Affiliation Data lists Gavin M. Gassen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northern Dutchess HospitalRhinebeck, NY · Acute Care Hospital · CCN 330049
- Vassar Brothers Medical CenterPoughkeepsie, NY · Acute Care Hospital · CCN 330023
- Westchester Medical CenterValhalla, NY · Acute Care Hospital · CCN 330234
Practice locations
Addresses where Gavin M. Gassen is enrolled with Medicare (CMS data updated 2026-10-02).
- 1705 E 19th StTulsa, OK 74104
- 1919 S Wheeling AveTulsa, OK 74104
- 1923 S Utica AveTulsa, OK 74104 (918) 744‑2071
- 1923 S Utica Ave, Medical Staff OfficeTulsa, OK 74104
- 21 Reade Pl, Suite 3200Poughkeepsie, NY 12601 (845) 471‑4086
Group practices
Medicare enrollment lists Gavin M. Gassen as a member of these groups (CMS data updated 2026-10-02).
- Ent and Allergy Associates LLP432 clinicians in the group
- St. John Physicians, Inc.259 clinicians in the group
Specialties
- Otolaryngologyprimary
Other ENT doctors in Tulsa
Clinicians with the same Medicare primary specialty in Tulsa, OK — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tulane University School Of Medicine |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508836636 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians