DR. GAVIN MARTIN GASSEN M.D.
NPI 1508836636
Otolaryngology in Poughkeepsie, NY

Q: What is Gavin Gassen's NPI number?

The NPI number for Gavin Gassen is 1508836636. It was assigned to this individual provider in the NPPES registry on January 23, 2006.

Q: What is Gavin Gassen's specialty?

The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.

Q: When was this NPI record last updated?

The NPPES record for Gavin Gassen was last updated on September 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since January 23, 2006PECOS EnrolledAccepts Medicare Assignment

21 READE PL STE 3200, POUGHKEEPSIE, NY 12601(845) 471-4086(845) 471-8296 Get Directions Write a Review

NPPES record last updated: September 16, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Gavin Martin Gassen M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GAVIN MARTIN GASSEN M.D. (NPI 1508836636) is an individual otolaryngology provider in Poughkeepsie, New York, licensed in New York (338537) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Vassar Brothers Medical Center, and is a graduate of Tulane University School Of Medicine (1992).

NPPES Registry Identity

NPI1508836636

Entity TypeIndividualMale

Primary Taxonomy207Y00000X

Provider Legal NameDR. GAVIN MARTIN GASSENCredential: M.D.

Location Address21 READE PL STE 3200Poughkeepsie, NY 12601-3944

Mailing Address660 White Plains Rd Ste 400Tarrytown, NY 10591-5107 · (914) 984-2546

Phone(845) 471-4086

Fax(845) 471-8296

Sole ProprietorNo

Medical School CMSTulane University School Of MedicineGraduated 1992

Enumeration DateJanuary 23, 2006

Last NPPES UpdateSeptember 16, 2025

NPPES CertifiedSeptember 16, 2025

✔ NPI 1508836636 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOtolaryngologyAllopathic & Osteopathic Physicians

Taxonomy Code207Y00000X

License✔ Licensed in NY · 338537

Definition

An otolaryngologist-head and neck surgeon provides comprehensive medical and surgical care for patients with diseases and disorders that affect the ears, nose, throat, the respiratory and upper alimentary systems and related structures of the head and neck. An otolaryngologist diagnoses and provides medical and/or surgical therapy or prevention of diseases, allergies, neoplasms, deformities, disorders and/or injuries of the ears, nose, sinuses, throat, respiratory and upper alimentary systems, face, jaws and the other head and neck systems. Head and neck oncology, facial plastic and reconstructive surgery and the treatment of disorders of hearing and voice are fundamental areas of expertise.

21 READE PL STE 3200, Poughkeepsie, NY 12601

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Oklahoma, CommunityCare, HMO Louisiana and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Gavin Martin Gassen M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1557527215

PECOS Enrollment IDI20250522001728, I20251007002931

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Gavin Gassen reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ent And Allergy Associates LLP

44 mi

Otolaryngology

660 WHITE PLAINS RD STE 400
Tarrytown, NY 10591

Reassigned Medicare billing, New York enrollment
312 clinicians in this Medicare group

NPI 1376598326 (914) 333-5800

Administrators Of The Tulane Educational Fund

1,115 mi

Specialist

200 HOSPITAL DR W
Hattiesburg, MS 39402

Reassigned Medicare billing, Louisiana enrollment
851 clinicians in this Medicare group

NPI 1033395298 (504) 988-2300

St. John Physicians, Inc

1,242 mi

Rural Health

112 NORTH 5TH STREET
Barnsdall, OK 74002

Reassigned Medicare billing, Oklahoma enrollment
820 clinicians in this Medicare group

NPI 1033176367 (918) 847-2558

Plessen Ent

Otolaryngology

4040 ESTATE LA GRANDE PRINCESSE STE 1
Christiansted, VI 00820

Reassigned Medicare billing, U.S. Virgin Islands enrollment

NPI 1609515394 (340) 715-7720

Plessen Medical Group, LLC

Urgent Care

SUNNY ISLES SHOPPING CENTER, SPACE #1, 2, AND 3A
Christiansted, VI 00820

Reassigned Medicare billing, U.S. Virgin Islands enrollment
17 clinicians in this Medicare group

NPI 1225639412 (340) 715-7720

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 10

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

145 services92 patients

Exam of ear using a microscope 92504

An exam of the ear using a microscope allows a detailed view of the ear structures. This non-invasive procedure helps identify issues such as infections, blockages, or ear damage. It's a safe, quick, and painless way to evaluate ear health.

94 services63 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

90 services90 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

69 services69 patients

Diagnostic exam of voice box using a flexible endoscope 31575

This procedure involves a doctor examining your voice box using a flexible endoscope, a thin tube with a light and camera. It's inserted through your nose or mouth to visualize your throat area. It helps detect any abnormalities in your voice box, ensuring optimal vocal health.

54 services45 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

48 services46 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Vassar Brothers Medical Center

Acute Care Hospitals · Poughkeepsie, NY

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330023

Location45 Reade PlacePoughkeepsie, NY 12601 · Dutchess County

Emergency services Birthing friendly

Northern Dutchess Hospital

Acute Care Hospitals · Rhinebeck, NY

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330049

Location6511 Springbrook AvenueRhinebeck, NY 12572 · Dutchess County

Emergency services Birthing friendly

Westchester Medical Center

Acute Care Hospitals · Valhalla, NY

1/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number330234

Location100 Woods RdValhalla, NY 10595 · Westchester County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 12601 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$141.77 typical visit price

range $61.88 – $187.05

Typical copayment $35.44 (range $15.47 – $46.76)

Most-billed visit code 99204

Established Patient

$76.88 typical visit price

range $19.92 – $151.94

Typical copayment $19.22 (range $4.98 – $37.98)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 7

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. RAMI N PAYMAN M.D.

Otolaryngology (Otology & Neurotology)