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Dr. Nick Mastromihalis, DDS

Dr. Nick Mastromihalis, DDS

Endodontics
25+ years of experience

Dr. Nick Mastromihalis, DDS is an endodontics practitioner in Mount Kisco, NY and has over 25 years of experience in the medical field. He graduated from SUNY Stony Brook in 1996. He is affiliated with Newyork-Presbyterian/Columbia University Medical Center. He is accepting new patients.

4.4 Star Rating
Based on 44 reviews 4.4 Star Rating (44 reviews)

Practice

101 S Bedford Rd Ste 410 Mount Kisco, NY 10549

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At a Glance

  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • Practices at Top Hospital
    America's 250 Best Hospitals Award™ See hospitals
  • Trustworthy
    Patients said this doctor is trustworthy. See reviews
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Dr. Mastromihalis' Reviews

Likelihood to recommend Dr. Mastromihalis

4.4
44 ratings, 37 with a written review
5 star
84%
84%
4 star
2%
2%
3 star
0%
0%
2 star
0%
0%
1 star
14%
14%

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Very Caring and skilled
I have seen 2 dentists and he found the canals and got rid of my infection.I found him excellent.
What went well
  • Appointment scheduling
  • Explained conditions well
  • Staff friendliness
  • Trusted the provider's decisions
What could be improved
No results
Helpful
vic – Dec 21, 2024
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Horrendous experience !!
I was referred to Dr. Mastro, an endodontist, for a possible root canal. Even though they took an X-ray and saw terrible decay, Dr. Mastro started the root canal anyway and didn't finish it. The office claimed there were no appointments for the next three weeks. It turned out the tooth had so much decay it was not savable and I had terrible pain for several weeks. The tooth had to be extracted by my regular dentist who told me it was obvious the tooth was not saveable. Dr. Mastro managed to tell me during the visit: 'I need to make $70,000 this year to pay for my health insurance.
What went well
No results
What could be improved
No results
2 others found this helpful
Helpful
Nov 21, 2023
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Dr Mastro was excellent. Painless
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
1 other person found this helpful
Helpful
Jess – Jan 03, 2022
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Excellent root canal specialist
What went well
  • Office environment
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Aug 12, 2021
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Dr. Masto is a great dentist. On my first visit he explained everything about the work he would have to do and even explained it to my son afterward. It took two visits with no pain during and after the root canal. He made sure I was numb enough for the procedure. I would highly recommend Dr.Mastro and his friendly and helpful staff.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
3 others found this helpful
Helpful
V Fusco – Mar 03, 2021
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An uncaring man w/ a big chip on his shoulder & a mean streak running down his back. RUN, do not walk, RUN & find a new health care provider who actually cares about your well-being, because HE certainly does not. This is an honest review from a sane, normal 55 year old father/businessman residing in Westchester 15 yrs. I want to know which dental student this man mugged and stole his diploma. He could not care less that I suffered in Level-10 excruciating tooth pain, made me wait over an hr. in his 90 degree searing heat office, after being welcomed by an unpleasant sour woman, only to tell me he had no time to see me despite my intense pain, although he "squeezed me in"(??!!) He could not help me, having "no time" , & then would NOT EVEN agree to call in pain medication even after my insurance co. had already approved it, saying " U know how many ppl a day tell me they are in pain ?" Do yourself a favor & find a DR that actually cares. There are many to choose from.
What went well
No results
What could be improved
  • Office environment
  • Difficult to schedule appointment
  • Didn't listen or answer questions
  • Staff wasn't friendly
  • Appointment was rushed
  • Long wait times
7 others found this helpful
Helpful
Christopher Duncan Marr – Feb 25, 2021
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Dr Mastro is fantastic doctor.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Nov 07, 2020
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I like Dr Mastro because he explained things to me clearly. He decided not to redo my root canal and referred me for an implant. The doctor that I saw me for the implant told me the tooth was cracked and showed me the crack. Thank God he didn't do my root canal. Great doctor
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
2 others found this helpful
Helpful
Apr 02, 2020
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He is the best. I trust him because he didn't jump to an immediate root canal.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
2 others found this helpful
Helpful
Nov 15, 2019
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Had my root canal in 1 visit. Staff was great. They take insurance which was great.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 others found this helpful
Helpful
Oct 16, 2018
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Dr Mastro is very friendly. During consultation, he explained things very clearly and thoroughly answered my questions. I immediately felt confident in him. At procedure, after applying local anesthesia to my gum,he stayed with me to explain what he would do and what happened afterwards.Very rare! He then meticulously worked on my tooth for 50 mins. I would like to see him for all my dental needs but unfortunately he only treats root canal. He is the best dentist I ever met. Thank you Dr Mastro!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
JX in ARMONK – May 01, 2018
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Dr Mastro saw me on an emergency. He was very accommodative and very friendly. I felt that he was very informative and caring. He also took my insurance which was great since these procedures are so expensive. I was pleased with Dr Mastro.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Linda in Bedfdord,NY – Apr 12, 2018
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Dr. Mastro is excellent - he's highly knowledgeable and he cares! The assistants are warm and friendly. The front desk people could use some people's skill training.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
STAMFORD – Jan 30, 2018
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Dr Mastro saw me at the end of his day in New Rochelle office. My dentist started the root canal and couldn't finish it. He referred me to Dr Mastro. He found all my nerves in the tooth and completed the root canal. The process was painless.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Private in Shrub Oak – Jan 10, 2018
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I saw Dr Mastro today on an emergency visit. He was great. Totally recommend him.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Steve in Bedfdord,NY – Jan 07, 2018
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Great Endodontist. He treated me several times and every time has been great
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
kleosmth in Bedfdord,NY – Jan 02, 2018
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Dr Mastro was more than good. His office was modern and clean. Painless as I read in most reviews. It cost me $200 or so and insurance covered the rest. He did everything under a microscope and took 2 visits. I also saw another doctor there in the past who did another root canal for me but he didn't take my insurance.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Sue in Somers, NY – Jan 01, 2018
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Dr. Nick Mastro makes Steve Martin in Little Shop of Horrors seem like Santa Claus. This Dr. is insensitive, cruel and verbally abusive and I would highly caution anyone against going to him.
What went well
No results
What could be improved
No results
9 others found this helpful
Helpful
White Plains, NY – Dec 19, 2017
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He was mild mannered. Made me comfortable and held a conversation well. Painless and a professional.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
jenn in Bedfdord,NY – Dec 08, 2017
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Great root canal specialist. He has several locations. I saw him in Mt Kisco. He used nitrous oxide and it was great. Loved the office and staff.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Sam in Bedford, NY – Dec 07, 2017
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About Me

biography

Dr Mastro graduated from SUNY at Stony Brook Dental School.

He completed his Endodontic specialty  in 1999 from the Department of Endodontics at Stony Brook.

He practices with Westchester Putnam Endodontics with location in New Rochelle NY, Mt Kisco NY, Carmel NY, and Greenwich CT.
  • Endodontics

  • Dentistry

  • Suny Stony Brook Medical Center

    Fellowship Hospital, 1999
  • Suny State University Hospital

    Internship Hospital, 1997
  • Suny Stony Brook

    Medical School, 1996
  • Adelphi

    Undergraduate School, 1992
  • English

  • Greek

  • Spanish

Locations

Practice

Westchester Putnam Endodontic Associates101 S Bedford Rd Ste 410 Mount Kisco, NY 10549
1

Affiliated Hospitals

  • Newyork-Presbyterian/Columbia University Medical Center

    622 W 168th St
    New York, NY 10032
    Recipient of 16
    hospital awards

    America's 250 Best Hospitals Award™ (2025)

    Top 5% in the nation for consistently delivering clinical quality

    View all awards
Learn more about how Healthgrades measures Hospital Quality