Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Christopher Michael Brennan, MD

Individual provider Internal Medicine Physician · NPI 1174771323

Dr. Christopher Michael Brennan, MD is a Hospitalist in West Islip, New York. Qualified in 2007, 19 years ago. Practices with Southwest Suffolk Medical PC, a 200-clinician group and accepts Medicare assignment. Licensed in Massachusetts, New York and Rhode Island.

Years since qualifying
19
Licensed in
MA, NY, RI
In the registry since
2008
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1000 Montauk Highway Hospitalist Dept 3RD Fl
West Islip, NY 11795
Phone: (631) 376-3610
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 277549 (NY)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD13459 (RI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 246004 (MA)

Record details

NPI number1174771323
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 29, 2008
Last updated in NPPESMay 19, 2025
Certification dateMay 19, 2025
Mailing address1000 Montauk Highway, Hospitalist Office, West Islip, NY 11795

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Southwest Suffolk Medical Pc — 200 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in West Islip