Gavin Martin Gassen, M.D.
Otolaryngology Physician · Poughkeepsie, NY
Gavin Martin Gassen, M.D. is an otolaryngology physician with a practice address in Poughkeepsie, New York, and NPI 1508836636, issued on Jan 23, 2006. Check the license (New York 338537, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Gavin Martin Gassen
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- 338537 NY
Self-reported in NPPES; status is on the state search - Practice location
- 21 Reade PL Ste 3200, Poughkeepsie, NY 12601
- Phone
- (845) 471-4086
- Enumerated
- Jan 23, 2006
- Record last updated
- Sep 16, 2025
- Fax
- (845) 471-8296
- Medicare enrollment
- Enrolled (PECOS I20250522001728); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1992
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 765 in New York → Look up another NPI →
Also registered at 21 Reade PL Ste 3200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ryan Borress, M.D.Otolaryngology Physician1649399320
- Jason Cohen, M.D.Plastic Surgery within the Head & Neck (Otolaryngology) Physician1851401152
- Michael Hugh, M.D.Allergy & Immunology Physician1861431405
- Alyssa Ludwin, PAMedical Physician Assistant1932434412
- Rami Payman, M.D.Otology & Neurotology Physician1134239445
- Amanda SullivanAudiologist1568804300
Verify Gavin Martin Gassen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 338537Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average otolaryngology physician in 2024
243 Medicare Part D claims for 93 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Fluticasone Propionate42 claims
- Ipratropium Bromide24 claims
- Omeprazole20 claims
- Levothyroxine Sodium16 claims
- Mometasone Furoate15 claims
- Azelastine Hcl12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Ent And Allergy Associates LLPPoughkeepsie, NY
- St. John Physicians, Inc.Tulsa, OK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gavin Martin Gassen among 765 otolaryngology physician records in New York
Gavin Martin Gassen, M.D. is one of 765 otolaryngology physician records with a practice address in New York. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 46% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1992 · median 2001 among the 542 with a school on file
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in New York
There are 765 otolaryngology physician records in New York.
All 765 in New York → Every provider in Poughkeepsie → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Ryan Borress, M.D.Poughkeepsie, NY 126011649399320
- Bulent Mamikoglu, M.D.Poughkeepsie, NY 126011043228349
- Ari Namon, MDPoughkeepsie, NY 126011700975372
- Kristina Piastro, M.D.Poughkeepsie, NY 126011003176611
- Mark Very, MDPoughkeepsie, NY 126011154369288
- Robert Ward, MDPoughkeepsie, NY 126011568486819
- Ryan Young, P. A.Poughkeepsie, NY 126011720198047
- James Meltzer, MDPoughkeepsie, NY 126031003906025
Common questions
What is Gavin Martin Gassen, M.D.'s NPI number?
Gavin Martin Gassen, M.D.'s National Provider Identifier (NPI) is 1508836636, issued on Jan 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gavin Martin Gassen, M.D. located?
The NPPES record lists a practice address at 21 Reade PL Ste 3200, Poughkeepsie, NY, 12601. Phone: (845) 471-4086. Providers update this record themselves, so call before visiting.
How can I verify Gavin Martin Gassen, M.D.'s license?
NPPES lists New York license number 338537, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gavin Martin Gassen, M.D. prescribe under Medicare Part D?
In 2024, Gavin Martin Gassen, M.D. had 243 Medicare Part D claims for 93 beneficiaries; the average among otolaryngology physician prescribers was 541. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.