What patients are saying
Overall rating
5.00
Average wait time
5.00
Bedside manner
5.00
“Rena provided such a kind, thorough, and human-centered approach. As someone with lifelong health anxiety, this appointment felt like a breath of fresh air. Would highly recommend!!”
Carley D.August 18, 2026
“I seen Dr Kini's nurse and she was very patient and kind. Also very attentive and inquisitive. The staff was also very helpful and made the check-in process easy.”
AMLess than 1 month ago
About Rena Kassak
Rena Kassak, FNP-BC, is a board-certified Family Nurse Practitioner providing compassionate, patient-centered care in primary care. She earned her Bachelor of Science in Life Science from Penn State Abington, where she participated in ACURA Undergraduate Research and received the Exemplary Leadership Award while serving as President of the International Cultural Alliance. She went on to earn a Master of Public Health from Florida International University, a Bachelor of Science in Nursing from New York University, and a Master of Science in Nursing (Family Nurse Practitioner) from the University of Pennsylvania. Rena is board certified as a Family Nurse Practitioner (FNP-BC), is a member of the American Nurses Association.
Rena's passion for healthcare began with her desire to improve health on a population level through public health, but she was ultimately drawn to becoming a Nurse Practitioner to build meaningful, one-on-one relationships with patients. She values the unique opportunity that primary care and cardiology provide to address both immediate health concerns and long-term wellness through preventive care. Rena takes a patient-first approach, listening closely to each individual's concerns, goals, and experiences before developing collaborative, evidence-based treatment plans tailored to their lifestyle and values. She believes exceptional care begins with genuine listening and strives to ensure every patient feels respected, informed, and empowered to take an active role in their health. Her greatest reward is seeing patients gain confidence in managing their health while building lasting trust along the way.
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Office location
Education and background
Practice names
Education and training
- University of Pennsylvania, Master's in Nursing
- New York University (Bachelor's)
- Florida International University, Master's in Public Health
Languages spoken
- English
- Russian
Provider's gender
Female
NPI number
1689518136
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
5.00
Wait time
5.00
Bedside manner
5.00
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12 reviews
Most relevant
Rena provided such a kind, thorough, and human-centered approach. As someone with lifelong health anxiety, this appointment felt like a breath of fresh air. Would highly recommend!!
August 18, 2026Carley D.Verified patient
I seen Dr Kini's nurse and she was very patient and kind. Also very attentive and inquisitive. The staff was also very helpful and made the check-in process easy.
Less than 1 month agoAM
I came in for my annual physical & saw Rena and she was fast, efficient, great bed-side manners and is a great add on to Dr. Kini's team.
Less than 1 month agoMW
It's been a few years since I've seen a doctor and first time saw nurse Rena and she was so easy to talk to and made me feel comfortable (I'm an anxious patient). She ensured I was clear on everything discussed and I left feeling secure about my care.
Less than 1 month agoEJ
She was very personable (which made me feel more comfortable), professional, and she took her time with me in answering all my questions. I've already scheduled my next appointment.
Less than 1 month agoCT
I had a wonderful experience with nurse Rena. She was very thorough, took her time and not dismissive. She showed that I was important in her care. You can tell she's very passionate about what she does.
Less than 1 month agoTY
Everyone I interacted with at the office was very helpful & caring and such a great experience for my first visit. Rena was very patient & kind. Also very intelligent and passionate about what she does.
Less than 1 month agoAS
I WOKE UP NOT FEELING GOOD AND SAW THE NURSE AND SHE WAS VERY EMPATHETIC AND PROPERLY EVALUATED ME (CHECKED MY EYES/EARS/NOSE/THROAT/HEART/BREATHING ETC) AND TOLD ME RIGHT AWAY WHAT THE CAUSE AND PROBLEM WAS. THE TESTS RAN ALSO DETERMINED AND CONFIRMED HER DIAGNOSIS WAS IN FACT CORRECT!
Less than 1 month agoJH
I had an exciting time with NP Rena. Her bedside manners are superb. I felt very comfortable and she created a wonderful healthcare plan. Would recommend her to anybody.
Less than 1 month agoJC
MY ORIGINAL DOCTOR HAS CURRENTLY MOVED OUT OF THE COUNTRY WITHOUT TELLING ME AND NEEDED AN APPOINTMENT URGENTLY & SAW RENA, SHE WAS VERY ATTENTIVE TO MY CONCERNS AND GAVE A GREAT CARE PLAN WITH OPTIONS TO CHOOSE FROM. I REALLY LIKED HER AND WILL BE KEEPING HER AS MY NURSE / PROVIDER IN CARE.
Less than 1 month agoLY
Had the pleasure of being seen by nurse practitioner Rena and she was very empathetic, pays attention closely to details, and plans carefully my treatment plan and options. I took a liking right away to her ways of care and plan on going back to her on my next appointment.
Less than 1 month agoWV
Less than 1 month agoInitials hidden
How soon can I make an appointment with Rena Kassak?
Generally, Rena Kassak has appointments available on Zocdoc within 1 week. You can see Rena Kassak's earliest availability on Zocdoc and make an appointment online.
Is Rena Kassak accepting new patients?
Rena Kassak generally accepts new patients on Zocdoc. You can see Rena Kassak's earliest availability on Zocdoc and schedule an appointment online.
Does Rena Kassak accept my insurance?
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Can I make an appointment with Rena Kassak online?
Yes, you can make an appointment online with Rena Kassak using Zocdoc. It’s simple, secure, and free.
What practice does Rena Kassak work with?
Rena Kassak works with Medical Offices of Manhattan.
Where is Rena Kassak's office located?
Rena Kassak's office is located at 211 E 51st St, New York, NY 10022.
What are common reasons for patients to see Rena Kassak?
Rena Kassak frequently sees patients for Allergy Consultation, Annual Physical, Arthritis, Illness, and Sleep Problems. You can see other visit reasons for Rena Kassak on their profile.
What languages does Rena Kassak speak?
Rena Kassak speaks English and Russian.
How do patients rate Rena Kassak in reviews?
12 patients have reviewed Rena Kassak. The overall rating for this doctor is 5/5. They have a 5/5 rating for bedside manner and a 5/5 rating for wait time. You can read individual reviews and ratings on their profile.