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250 W 57th St., Suite 831, New York, NY, 10107
35 E 30th St., Ground Floor, New York, NY, 10016

Qualifications and Experience

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Professional Statement

** Dr. Ast does not see Aetna, Health first Silver leaf, fidelis, Humana or affinity patients for Primary Care**

**We DO NOT accept Magnacare Oscar or Health Rebulic.**

Dr. Frederick Ast specializes in Primary Care, Allergy, and Rheumatology treatments.

Dr. Ast strives to achieve the highest level of quality and personalized care for each of his patients.


Dr. Frederick Ast is a Board Certified Primary Care Doctor, Allergist and Rheumatologist. Dr. Ast attended State University of New York, Downstate Medical Center, Mount Sinai School of Medicine for Allergy and Immunology, Bellevue Hospital Center for Rheumatology, and Saint Luke's-Roosevelt Hospital Center for Internal Medicine.

Dr. Ast treats patients for a variety of reasons including for allergy follow up, arthritis, joint pain, lupus, and much more.

Zocdoc Awards

Verified Patient Reviews

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He was very kind and caring. He was open to listening, however, sometimes interrupted and attempted to finish your sentences. The office isn't super clean and organized. The lady at the front was nice.

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I am a patient for over 6 year. While moving around the city and charging neighborhoods I never look for a replacement. Dr. Ast is an extremely knowledgeable and very accurate with diagnoses he provides. He is also an Astma-allergie specialist so you don't need an allergist either:) You will never feel rushed with Dr. Ast. Your annual check ups will be as detailed and thorough as you never experienced before. AMAZING doctor and very knowledgable team.

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He spent time with me and listened. No rush. Very thorough. Great staff too.

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Dr. Ast gave me good, practical advice.

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Dr. Ast has a heart of gold. He really cares about his patients, he is calm and efficient. I feel so good in his care.

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Dr. Ast was very professional and helpful. I was there for an annual physical and I felt satisfied with the examination.

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Dr. Ast was kind, caring and got to the point. He is the first doctor I have seen in almost 2 years that wants to get to the bottom of my health concerns as badly as I do. See this doctor if you want to get to the root of your issue with the bonus of a friendly visit with a great and honest man.

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Dr. Ast provided me with clarity and a diagnosis for something that I had been suffering with and confused about for several years - Fibromyalgia. He was thorough, informative and very willing to help. The office offers many modalities for treatment. I was seen right away. Highly recommended.

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Only doctor to accurately diagnose me in 15 years.

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Dr. Ast is very experienced and knowledgeable in his field. i have been going to him for almost 10 years.

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It was great. Like always. Excellent doctor.

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Dr. Ast has a full service, extremely organized office. Great physician. Dedicated and caring staff A++

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I felt secure that he was thorough and will help me find out the cause of my various symptoms. I like his step by step approach.

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Dr. Ast has been my doctor for over 15 years.i feel very confident and comfortable with all of his decision. Also the staff is wonderful

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He is very caring

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Dr. Ast is both professional and personable. He took my concerns seriously and his staff is friendly.

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As usual I enjoyed my meeting with Dr. Ast. I had some concerns that he was able to address very quickly, and he was also able to direct me to a specialist that's going to help make some pain management progress. He was friendly and took my worries seriously. Really I couldn't ask for anything more other than wishing we had more time to talk, but I suspect he is a very busy man because he's very good at his job! Also, as a side note, the other staff at Dr. Ast's office are very friendly. Just great people all around.

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He is the best! Spends a lot of time with you. Sometimes things are hectic in the office and he gets behind, but he's worth the wait because he answers all questions and is very, very helpful. You can tell he's really listening.

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I was a little late for my first visit due to traffic and they took me anyway. Even though I had to wait a short while, by the time I was in Dr Ast's office a few minutes, I knew I needed to cancel my afternoon plans. I was in a severe active flareup and he took immediate action, including pulling in members of his team to help. No one had ever suggested I see a physical therapist before. No one had ever been so proactive and certain of what to do next to determine what was happening. And he's kind and personable too. When I felt a little feint, he said it was a normal reaction and not to feel ashamed of the physicological response. It was incredible. And my voice was an active and heard part of the conversation. No one spoke above me but with me. That was empowering!

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The office is super friendly and organized, and it's a luxury that we can book on zocdoc. The staff is welcoming and attentive. Dr Ast is very thorough and answered all my questions as well as made numerous suggestions to help. It's a busy office so there might be a brief wait time but the care you get is above and beyond the norm. AAA Plus!

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I was pretty scared to see a rheumatologist for the first time, since I was coming to him with a laundry list of items (which, if you're seeing a rheumatologist, is likely what you're gonna do!). He was very kind, thoughtful, intelligent, thorough, and most importantly (to me), he really seemed to listen to what I was saying. I am very excited to be working with him and I would strongly recommend seeing him. My only complaint is that he seemed really busy and everything was a bit rushed, but I'm willing to deal with that considering how great he was. Go in there with your list of meds and various symptoms, be prepared. That will help things go nice and smoothly.

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very attentive.great doctor

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GREAT EXPERIENCE!!!!

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Dr. Ast was great, but his staff was the absolute worst I have ever dealt with. The nurses were rude and unfriendly. During my initial exam by the nurse before Dr. Ast came in she left the door open and there were other patients walking by which was in no way private. She also had a very unprofessional bedside manner. Dr. Ast came in and was helpful and informative and referred me to a G.I. in the office, but told me I would have to wait three weeks for his next available appointment. When I went back for my appointment with the GI (with the appointment card the office staff had written for me in hand), they said there was a mistake in scheduling and the G.I. was only in every other week and I would have to come in the following week. Accidents happen and I was understanding- the woman was also very apologetic and said she was going to speak to Dr. Ast about the situation and give me a call if they could see me sooner (I never got a call). I came back for my appointment the following week and the same woman at the front desk informed me that the G.I. no longer worked there and there was nothing she could do because it wasn't her responsibility to call the G.I.'s patients and cancel the appointments. I never got a call from the office notifying me that he had left the office, no referral to another G.I. and no apology from the office. I waited a month to see a G.I. and never did because of this office's disorganization. I will not be going back as they clearly have no concern for the health or wellbeing of their patients. Also a lack of communication and the fact that I wasted time traveling to and from the office for no reason was seriously disappointing. I wouldn't recommend this office to anyone.

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He is amazing! I will recommend anyone to him ! Funny , and caring ! Makes sure you don't worry and explains things well . Loved him and hope to find a primary care just as amazing

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I've seen Dr. Ast as my primary care physician and as an allergist this year. Good doc, and very professional.

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Dr. Ast is very good. Been going to him a long time. He is a nice person. I wasn't entirely satisfied with this last visit, as I felt there had been some oversights. The office really needs work as they are on the shabby side and the staff, though well meaning, seemed fairly confused.

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Good doctor. The office was in a good location and pretty nice office. Would recommend for a check up

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This doctor was hopeless. His response to my medical questions on more than one occasion was " that's a good question, I'm not sure" and he also forgot to screen my blood for a specifically requested test.

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Good and intelligent doctor

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Dr. Ast is very professional and he listens to what you have to say.

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Dr. Ast is friendly and knowledgeable, but a bit absent-minded. In his defense, he runs a busy office, but he depends on his patients to follow-up and manage their health. I will say, it is very difficult to find a good Primary Care doctor, and Dr. Ast's services work for me. They just might not work for everyone.

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Dr Ast Frederick is very experienced professional and understands his patient's needs very well.

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office staff was nice enough, not very professional. They talked very loud in the waiting room area. When I finally saw the Dr, he seemed to rush to get the physical therapist in to see me. While i was talking to the PT, the Dr disappeared and I didn't see him again. No follow up.

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Dr Ask was very knowledgeable of Rheumatoid Arthritis. Me being a young female, he gave me a lot of information on how to live with it. He wants to continue to see me.

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I saw Dr. Ast for rheumatoid arthritis treatment as a new patient. He was extremely thorough and attentive and had a great bedside manner. I felt like he really listened to me, was very responsive to my questions and seemed very focused on creating a treatment plan specific to my needs. I highly recommend him.

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Although my visit with Dr. Ast was fine, he is near-impossible to reach by phone. I have been trying to ask a simple question about one of my medications and calling almost every day for the past three weeks. On the occasions when the staff actually do pick up the phone, they tell me that he will call back, but he never does. I know he's busy but a (at least!) three week wait for a phone call is unacceptable.

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I especially liked the nurse who took my vitals and blood samples. She was hilarious, down-to-earth, and exactly the kind of person you'd want to encounter in a doctor's office.

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He is great and he really helped me

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Dr. Ast was good and helpful - I waited awhile, but that was because the other doctor in the office was out sick, so he had to take on alot of other patients with appointments, so it was fine. He was rushed, but still did a good job at quickly assessing issues I had, and giving a general physical.

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