of
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Christopher Brennan, MD

Dr. Brennan is an internal medicine doctor in the West Islip area. He is affiliated with St Francis Hospital and 2 more hospitals.
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Conditions treated

Tap to see more details about our calculations for each condition.

Top 25%
38k doctors
Top 15%
38k doctors
Top 5%
19k doctors
Dr. Brennan saw more cardiovascular disease (CVD) patients than 75% of similar doctors nationwide in 2014–2019. Learn more.
Top 25%
36k doctors
Top 15%
36k doctors
Top 5%
18k doctors
Dr. Brennan saw vascular disease patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
40k doctors
Top 15%
40k doctors
Top 5%
20k doctors
Dr. Brennan saw pain patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
1.7k doctors
Top 15%
1.7k doctors
Top 5%
828 doctors
Dr. Brennan saw more alcohol withdrawal patients than 75% of similar doctors nationwide in 2014–2019. Learn more.
Top 25%
9.5k doctors
Top 15%
9.5k doctors
Top 5%
4.7k doctors
Dr. Brennan saw more sepsis patients than 75% of similar doctors nationwide in 2014–2019. Learn more.
Top 25%
26k doctors
Top 15%
26k doctors
Top 5%
13k doctors
Dr. Brennan saw more heart disease patients than 75% of similar doctors nationwide in 2014–2019. Learn more.
Top 25%
2.8k doctors
Top 15%
2.8k doctors
Top 5%
1.4k doctors
Dr. Brennan saw angina patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
13k doctors
Top 15%
13k doctors
Top 5%
6.3k doctors
Dr. Brennan saw more shortness of breath patients than 75% of similar doctors nationwide in 2014–2019. Learn more.
Top 25%
35k doctors
Top 15%
35k doctors
Top 5%
17k doctors
Dr. Brennan saw digestive tract conditions patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
34k doctors
Top 15%
34k doctors
Top 5%
17k doctors
Dr. Brennan saw more diabetes patients than 75% of similar doctors nationwide in 2014–2019. Learn more.
Top 25%
31k doctors
Top 15%
31k doctors
Top 5%
15k doctors
Dr. Brennan saw more type 2 diabetes patients than 75% of similar doctors nationwide in 2014–2019. Learn more.
Top 25%
11k doctors
Top 15%
11k doctors
Top 5%
5.5k doctors
Dr. Brennan saw acute renal failure patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
12k doctors
Top 15%
12k doctors
Top 5%
6.1k doctors
Dr. Brennan saw kidney failure patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
26k doctors
Top 15%
26k doctors
Top 5%
13k doctors
Dr. Brennan saw more anemia patients than 75% of similar doctors nationwide in 2014–2019. Learn more.
Top 25%
3.8k doctors
Top 15%
3.8k doctors
Top 5%
1.9k doctors
Dr. Brennan saw alcoholism patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
16k doctors
Top 15%
16k doctors
Top 5%
7.8k doctors
Dr. Brennan saw more hemorrhage patients than 75% of similar doctors nationwide in 2014–2019. Learn more.
Top 25%
5.0k doctors
Top 15%
5.0k doctors
Top 5%
2.5k doctors
Dr. Brennan saw drug abuse patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
2.3k doctors
Top 15%
2.3k doctors
Top 5%
1.1k doctors
Dr. Brennan saw diabetic ketoacidosis (DKA) patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
30k doctors
Top 15%
30k doctors
Top 5%
15k doctors
Dr. Brennan saw lung condition patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
23k doctors
Top 15%
23k doctors
Top 5%
11k doctors
Dr. Brennan saw high cholesterol patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
18k doctors
Top 15%
18k doctors
Top 5%
8.8k doctors
Dr. Brennan saw coronary artery disease (CAD) patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
4.0k doctors
Top 15%
4.0k doctors
Top 5%
2.0k doctors
Dr. Brennan saw opiate dependence patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
16k doctors
Top 15%
16k doctors
Top 5%
7.9k doctors
Dr. Brennan saw abnormal breathing patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
19k doctors
Top 15%
19k doctors
Top 5%
9.3k doctors
Dr. Brennan saw more cellulitis patients than 75% of similar doctors nationwide in 2014–2019. Learn more.
Top 25%
17k doctors
Top 15%
17k doctors
Top 5%
8.4k doctors
Dr. Brennan saw atrial fibrillation (Afib) patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
18k doctors
Top 15%
18k doctors
Top 5%
8.8k doctors
Dr. Brennan saw pneumonia patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
5.5k doctors
Top 15%
5.5k doctors
Top 5%
2.7k doctors
Dr. Brennan saw pancreatitis patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
12k doctors
Top 15%
12k doctors
Top 5%
6.0k doctors
Dr. Brennan saw fainting patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
18k doctors
Top 15%
18k doctors
Top 5%
9.0k doctors
Dr. Brennan saw chronic kidney disease patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Top 25%
4.9k doctors
Top 15%
4.9k doctors
Top 5%
2.4k doctors
Dr. Brennan saw drug addiction patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.
Locations

Dr. Brennan sees patients and can be reached at the following location.

Good Samaritan Hospital Medical Center
1000 Montauk Hwy
West Islip, NY 11795
33 miles away

Reviews

Credentials
  • Ross University School of Medicine
    MEDICAL EDUCATION, 2007

Specializations

    1. Allopathic & Osteopathic Physicians
    2. Internal Medicine

Hospital affiliations

Dr. Brennan is able to admit and treat patients at the following hospitals.

  • St Francis Hospital
    A
    Hospital safety grade (Fall 2019)
  • Good Samaritan Hospital Medical Center
    B
    Hospital safety grade (Fall 2019)
  • Roger Williams Medical Center
    Hospital safety grade not available

Insurance accepted

Always check coverage with your doctor’s office.

  • Aetna
  • Affinity Health Plan
  • Anthem
  • Assurant Health
  • AvMed
  • Avera
  • Beacon Health Strategies
  • Blue Cross Blue Shield of Arizona
  • Blue Cross Blue Shield of Massachusetts
  • Blue Cross and Blue Shield of Florida
  • Blue Cross and Blue Shield of Rhode Island
  • Capital District Physicians Health Plan
  • CareFirst BlueCross BlueShield
  • Cigna
  • CoreSource
  • Coventry Health Care
  • Cross and Blue Shield of North Carolina
  • EmblemHealth
  • Fallon Health
  • First Choice Health
  • Geisinger Health Plan
  • Harvard Pilgrim Health Care
  • Health First
  • HealthCare Partners
  • HealthNow New York
  • HealthPartners
  • HealthSCOPE Benefits
  • HealthSmart
  • Highmark Blue Cross Blue Shield
  • Horizon Blue Cross Blue Shield of New Jersey
  • Humana
  • Independence Blue Cross AmeriHealth
  • Independent Health
  • Lifetime Healthcare
  • MVP Health Care
  • Magellan Health
  • MagnaCare
  • Mayo Clinic Health Solutions
  • MedCost
  • Medica
  • Medical Mutual of Ohio
  • Medicare
  • Meritain Health
  • Midlands Choice
  • MultiPlan
  • Neighborhood Health Plan
  • Optima Health
  • PacificSource
  • Physicians Health plan
  • Pomco
  • PreferredOne
  • Providence Health Plan
  • Security Health Plan
  • TRICARE
  • The Health Plan
  • Tufts Health Plan
  • UPMC Health Plan
  • United Healthcare
  • ValueOptions
  • WPS Health Insurance
  • Wellmark Blue Cross and Blue Shield