What patients are saying
Overall rating
4.93
Average wait time
4.71
Bedside manner
5.00
“Great experience and visit. The office was easily accessible and had free valet parking. I waited very little to be seen and was extremely happy with the visit. Dr. Zelkowitz was very knowledgeable and helpful. ”
Gina N.March 31, 2026
“Dr Zelkowitz was great at explaining test results. He took the time to hear our concerns with my mother’s reason for seeking a visit. Can say enough about him. He is a very good doctor.”
Initials hiddenLess than 1 month ago
About Dr. Marc Zelkowitz
Is Board Certified and Specializes in Internal Medicine and Nephrology. He is brave yet energetic doctor with over 17 years in the medical field. Dr. Zelkowitz is currently affiliated with several hospitals and nursing homes to conveniently serve the forever growing community. He is the medical director for Fresenius Tenafly where he spends a great time treating and caring for our dialysis patients.
Is this doctor in your insurance network?
Enter your insurance carrier and plan
choose insurance
In-network insurances
99% of patients have successfully booked with these insurances
Aetna
BlueCross BlueShield
Cigna
Emblem Health
Medicare
UnitedHealthcare
Office locations
Dr. Marc Zelkowitz, MD also offers online video visits for patients
Bergen Kidney Center (Location #2) (1 of 2)
250 Old Hook Road, Suite 303b, Westwood, NJ 07675
Bergen Kidney Center (Location #1) (2 of 2)
300 Grand Avenue, Suite 101, Englewood, NJ 07631
1 of 2
Education and background
Practice names
Hospital affiliations
- Englewood Hospital and Medical Center
- Hackensack University Medical Center at Pascack Valley
- Holy Name Medical Center
Board certifications
- American Board of Internal Medicine
- Nephrology (American Board of Internal Medicine)
Education and training
- Medical School - Albert Einstein College of Medicine, Doctor of Medicine
- Albert Einstein College of Medicine, Fellowship in Nephrology
Languages spoken
- English
Provider's gender
Male
NPI number
1609134576
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.93
Wait time
4.71
Bedside manner
5.00
Your trust is our top concern, so providers can't pay to alter or remove reviews. We also don't publish reviews that contain any private patient health information. Learn more here
46 reviews
Most relevant
It was a good visit there he told me so things I need to no about my kidney
April 4, 2026Jeffrey H.Verified patient
Excellent Doctor. Very experienced along with common sense. Great communication. Highly recommend Dr Z.
June 26, 2025Robert D.Verified patient
Dr. Zelkowitz was very helpful and thorough during my visit. Highly recommend.
August 12, 2025Boguslaw K.Verified patient
Great experience and visit. The office was easily accessible and had free valet parking. I waited very little to be seen and was extremely happy with the visit. Dr. Zelkowitz was very knowledgeable and helpful.
March 31, 2026Gina N.Verified patient
Dr Zelkowitz was great at explaining test results. He took the time to hear our concerns with my mother’s reason for seeking a visit. Can say enough about him. He is a very good doctor.
Less than 1 month agoInitials hidden
I am beyond pleased with the exceptional care I received from Dr. Zelkowitz. From the moment I arrived, I was impressed by how immaculate the office was and how friendly and welcoming the entire staff made me feel.
Dr. Zelkowitz demonstrated remarkable professionalism, compassion, and patience throughout my visit. After dealing with hematuria for over five years, I was finally referred to his care, and I am truly grateful. He took the time to thoroughly explain the potential causes of my condition, discuss diagnostic options, and outline a clear treatment plan — all in a way that was easy to understand and reassuring.
This medical practice sets a high standard for patient care. My overall experience was outstanding, and I would highly recommend Dr. Zelkowitz to anyone seeking an exceptional kidney specialist.
November 5, 2025Yajaira R.Verified patient
Excellent doctor. Explained everything clearly. Asked me several times if I had any questions.
Straightforward and to the point.
Thanks!
March 7, 2025Robert D.Verified patient
Less than 3 months agoInitials hidden
Less than 3 months agoInitials hidden
January 16, 2026Rebecca S.Verified patient
Less than 6 months agoInitials hidden
Less than 6 months agoOskar M.Verified patient
September 8, 2025Ike K.Verified patient
May 27, 2025Sal I.Verified patient
Less than 1 year agoInitials hidden
January 6, 2025Leticia R.Verified patient
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
More than 1 year agoInitials hiddenSource: Partner
How soon can I make an appointment with Dr. Marc Zelkowitz?
Generally, Dr. Marc Zelkowitz has appointments available on Zocdoc within 1 week. You can see Dr. Zelkowitz's earliest availability on Zocdoc and make an appointment online.
Is Dr. Marc Zelkowitz accepting new patients?
Dr. Marc Zelkowitz generally accepts new patients on Zocdoc. You can see Dr. Zelkowitz's earliest availability on Zocdoc and schedule an appointment online.
Does Dr. Marc Zelkowitz accept my insurance?
Choose your insurance plan to verify if Dr. Zelkowitz is in-network.
Can I make an appointment with Dr. Marc Zelkowitz online?
Yes, you can make an appointment online with Dr. Zelkowitz using Zocdoc. It’s simple, secure, and free.
Which hospital is Dr. Marc Zelkowitz affiliated with?
Dr. Marc Zelkowitz is affiliated with Englewood Hospital and Medical Center, Hackensack University Medical Center at Pascack Valley, and Holy Name Medical Center.
What practice does Dr. Marc Zelkowitz work with?
Where is Dr. Marc Zelkowitz's office located?
Dr. Marc Zelkowitz has 4 office locations, including in Westwood and Englewood, view full addresses on Dr. Zelkowitz's profile.
Which board certifications does Dr. Marc Zelkowitz have?
Dr. Marc Zelkowitz is certified by American Board of Internal Medicine and Nephrology (American Board of Internal Medicine).
What are common reasons for patients to see Dr. Marc Zelkowitz?
Dr. Marc Zelkowitz frequently sees patients for High Blood Pressure / Hypertension, Kidney Stones, Nephrology Consultation, New Patient Visit, and Urinary Tract Infection (UTI). You can see other visit reasons for Dr. Marc Zelkowitz on their profile.
What languages does Dr. Marc Zelkowitz speak?
Dr. Marc Zelkowitz speaks English.
How do patients rate Dr. Marc Zelkowitz in reviews?
46 patients have reviewed Dr. Marc Zelkowitz. The overall rating for this doctor is 4.93/5. They have a 5/5 rating for bedside manner and a 4.71/5 rating for wait time. You can read individual reviews and ratings on their profile.