Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Sean Cornelius Galligan, MD

Individual provider Internal Medicine Physician · NPI 1982995692

Dr. Sean Cornelius Galligan, MD is registered under Cardiovascular Disease (Cardiology) in Brooklyn, New York. Qualified in 2011, 15 years ago. Practices with Amboy Medical Practice PC, a 173-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in New York.

Years since qualifying
15
Licensed in
NY
In the registry since
2011
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

502 86th St
Brooklyn, NY 11209-5211
Phone: (929) 470-8403
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 800 Poly Pl, Brooklyn, NY 11209-7104 — (718) 836-6600
  • 1058 Forest Ave, Staten Island, NY 10310-2419 — (718) 818-7425

Specialties & licences

Interventional Cardiology Physician (primary) Taxonomy 207RI0011X · Licence 292502 (NY)
Internal Medicine Physician Taxonomy 207R00000X · Licence 292502 (NY)

Record details

NPI number1982995692
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 28, 2011
Last updated in NPPESSeptember 23, 2026
Certification dateSeptember 23, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolOTHER
Graduated 2011 (15 years in practice)
Group practice Amboy Medical Practice Pc — 173 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of nail tissue 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients711
Services billed 1,368 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $905 43 payments · a meal or drink at a meeting or visit, not a fee
Education $99 1 payment · educational material or training, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Amboy Medical Practice PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 173 clinicians in the practice; 12 are shown here.

Other providers in Brooklyn