Summary

Dr. Louis Greenblatt is a family medicine physician who also specializes in geriatric medicine, bringing comprehensive care to patients across all life stages. He earned his medical degree from the New York Institute of Technology College of Osteopathic Medicine and completed his residency training at University Hospital SUNY Stony Brook. With 43 years of experience in medicine, Dr. Greenblatt has developed extensive expertise in managing the health needs of families and older adults. He speaks English with his patients.

Dr. Greenblatt practices at multiple locations throughout New York, including Saint Catherine of Siena Medical Center and Stony Brook University Hospital, with offices in Hauppauge and Stony Brook. His clinical focus includes treating obesity and weight management concerns, as well as addressing familial lipid disorders that can affect multiple family members. He performs routine blood tests and administers flu vaccines to help maintain his patients' preventive health care. Patients have given Dr. Greenblatt an average rating of 4.1 on Vitals, reflecting their confidence in his comprehensive approach to family and geriatric medicine.
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Overview based on verified provider data

Quick Facts

  • 4.1
  • 43 years of experience
  • 38 insurance plans accepted
  • speaks English
  • University Hospital Suny Stony Brook
  • 11 written reviews
  • 2 specialties
  • 12 areas of expertise
  • 2 hospital affiliations
  • 3 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Louis Leonard Greenblatt has 3 locations

Smithtown Family Medicine

533 Route 111Hauppauge, NY 11788
Mon10:00 am - 5:00 pm
Tue12:00 pm - 5:00 pm
Wed12:00 pm - 5:00 pm
ThuClosed
Fri10:00 am - 5:00 pm
Sat9:00 am - 12:00 pm
SunClosed

Stony Brook University Hospital

101 Nicolls RdStony Brook, NY 11794

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Dr. Louis Leonard Greenblatt, DOCathleen Kneidl, PA-CRafael Yaakobov, FNPDr. Maria C. Hernandez, MD
Family MedicineFamily MedicineFamily MedicineFamily Medicine
Accepts New Patients Accepts New Patients Accepts New Patients
4.1 
43 Years of Experience 8 Years of Experience 57 Years of Experience
No Virtual Visit Option No Virtual Visit Option Virtual Visit Available No Virtual Visit Option
Speaks English Speaks English Speaks English Speaks English, Spanish
Hauppauge , NYEast Meadow , NYBronx , NYHuntington Station , NY
Med School: New York Institute Of Technology College Of Osteopathic Medicine Med School: Universidad Autonoma De Guadalajara Facultad De Medicina
Current Profile
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Insurance Plans Accepted by Dr. Louis Leonard Greenblatt

  • Accepts Medicaid
  • AARP
  • Aetna
  • Aetna - Medicare
  • Aetna - POS
  • Anthem Blue Cross
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield - PPO
  • Cigna
  • Cigna - PPO
  • EmblemHealth
  • EmblemHealth - PPO
  • Empire Blue Cross Blue Shield
  • Fidelis Care (NY)
  • Golden Rule
  • HealthFirst (NY)
  • Humana
  • Humana - Medicare (Advantage HMO)
  • MagnaCare
  • Medicaid - Medicaid
  • Medicaid - Medicaid (Managed)
  • Medicare
  • Medicare - Medicaid
  • Medicare - Medicaid (Managed)
  • Medicare - Medicare
  • Meritain Health
  • Oscar Health Insurance
  • Palmetto GBA
  • Palmetto GBA - Medicare
  • Travelers
  • Tricare
  • UnitedHealthcare
  • UnitedHealthcare - HMO
  • UnitedHealthcare - Medicare
  • UnitedHealthcare - Medicare (Advantage HMO)
  • UnitedHealthcare Oxford
  • UnitedHealthcare Oxford - HMO
  • UnitedHealthcare Oxford - PPO
  • Wellcare

Medical Specialties

Dr. Louis Leonard Greenblatt has the following 2 specialties

Specialty Expertise

Dr. Louis Leonard Greenblatt has the following 12 areas of expertise

  • Alzheimer's Disease
  • Cognitive Issues/Testing
  • Confusion
  • Dementia
  • Dementia Testing
  • EOL Care
  • Geriatric Medicine
  • Osteopenia
  • Osteoporosis
  • Preventive Medicine
  • Senility
  • Urinary Incontinence

Certifications, License, & Education

43 Years Experience

Dr. Louis Leonard Greenblatt holds an active medical license in the state of New York.

Medical License

Doctor Of Osteopathy with an active medical license in the state of New York that expires in 2027.

Education & Training

Residency

Completed their residency at University Hospital Suny Stony Brook.

Medical School

Graduated from New York Institute Of Technology College Of Osteopathic Medicine in 1983.

NPI Number

Dr. Greenblatt's NPI number is 1891710307.

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Frequently Asked Questions

Where is Dr. Louis Greenblatt's office located?
Dr. Louis Greenblatt's office is located at 533 Route 111, Hauppauge, NY, 11788.
Does Dr. Louis Greenblatt accept my insurance?
You can see the insurance plans that Dr. Louis Greenblatt accepts on their Vitals profile.
How can I make an appointment with Dr. Louis Greenblatt?
You can find contact information for Dr. Louis Greenblatt here on Vitals.
Which hospitals is Dr. Louis Greenblatt affiliated with?
Dr. Louis Greenblatt is affiliated with Saint Catherine Of Siena Medical Center and Saint Johns Episcopal Hospital South Shore.
Does Dr. Louis Greenblatt accept virtual/telehealth appointments?
Dr. Louis Greenblatt has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.

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