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Katherine Ni, DMD, MS, PC
Periodontics and Dental Implants

Patient Reviews

We strive to provide the best possible care and service for our patients. Please leave a review to let us know how we are doing and to share your experience with others.

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Read what other patients have said about us:

James Fichthorn, Stevens

Great experience! The staff is very kind, courteous and professional! I would definitely recommend.


Dwight T., Lancaster

Dr. Green and staff are always a pleasure to have my dental needs met. I highly recommend them.


Jack Nelson , Ephrata

Everyone was very nice and professional. Periodontist was very concerned about my comfort and did a great job cleaning my teeth.


Stacey Weaver, Ephrata

Knowledgable, sweet and to the point.


dp, Chester County

I'm in my early 70s and have made numerous trips to doctor offices over the years; some injury-related, some age-related. If I had to rank my doctor office visits, I would rank Dr Green and his staff at the top. The courtesy, friendliness, efficiency, professionalism......all exceptional. Even before I went through the door, I noticed the welcoming atmosphere. Dr. Greens wife came out to greet me and get me started on paperwork. Very friendly and professional. The sign on the wall behind the counter ....... PEACE ON EARTH ..... gave me a clue. Five stars, to be sure. On a scale of 1 to 10, with 10 being exceptional, definitely a 10, or higher. Highly recommend this establishment.


Herb F,, Lancaster

Of course the training and experience of the professionals at this office is a plus. But it is he friendliness of the staff that tells me they don't hear any complaints. I've been to other professional offices where you know in a flash when the staff sigh, look up at you with a bored expression and cautiously ask, "Can I help you?" that its a tension-filled office. None of that here. I walked in, looking like Alfred E. Neuman of MAD magazine with a missing front tooth. I was fearing the worst. Both staff, sitting out front, greeted me by name, inquired how I was doing with the COVID-19 restrictions and before I finished answering, another led me to the dental exam room. Three of the professional staff attended to me in a manner that erased all my concern about the airplane-hangar wide hole in my teeth. They made it a visit with competent friends, not a threat to my peace of mind.


Kimberly S. , York

Everyone in your office was welcoming, comforting and most of all helpful in every possible way. Your staff made a little scary experience one that was enjoyable and filled with laughter. It was truly one of the best offices I have ever visited!! I definitely appreciated the kindness and the cleanliness!!! Thank you!! My daughter absolutely loved Trisha!


Michael R, Reading, Pa

The staff was professional and warm, a great experience. Dr Green is a positive driver to deliver great patient care. I will recommend Dr Green and team to my family and friends.


Mark B., Enola

The entire staff was very pleasant and made myself feel welcome from the first “hello”. The office was very accommodating to my schedule and notified me with ample time when there was an opening or cancellation in the schedule to get me in sooner. Dr. Greene and his staff was very knowledgeable and explained my upcoming procedure from start to finish. I greatly appreciated the time and knowledge the staff shared with me! Thank you!


Ann S., Ephrata

Dr. Green and his staff are the best. Everyone is pleasant, personable, knowledgeable, and efficient. They were very precise in describing the steps of the procedure and making sure I was all right before, during, and after. Dr. Green himself was efficient and consistently supported me and his assistants. I can highly recommend this practice.


Michele T, Willow Street, Pa

I was greeted warmly upon arrival and promptly taken to an exam room. Assistant Trisha and her new hire were very friendly and knowledgeable. Dr Green was really personable and very confident which is important to me. He explained everything in detail and I felt extremely comfortable to be in his care. I will be returning soon for a procedure and have no doubt that all will go well.


Bob, Lititz

I just love the staff here they are so friendly and knowledgable !! They are the best so there’s no reason for me to look elsewhere !


Nan C., Lancaster

I felt immediately at ease when entering their office, greeted warmly and treated promptly. Everyone was attentive to my needs and listened carefully to my concerns. Treatment options were given that I was comfortable with, and explained with patience. Dr Green, personable and thorough, and Trisha, great ! I would highly recommend Dr. Green and his staff to address any periodontal issues.


Steve, Flores

I was dealing with infection, pain underneath a lower jaw tooth and an oral ulcer that was getting beyond me to self treat. The staff for Dr Green were able to work me into their schedule for an appointment. Dr Green took X-rays, identified the main issue, and clearly laid out a treatment plan that I appreciated. Dr Green is very knowledgeable in what he does and has a very kind demeanor. His staff are all extremely kind and accommodating as they care for the patient before and after being seen by Dr. Green. I can say a thing or two about caring kindness and know how much that means to people as I am a hospice nurse.


Yolonda Christian, lititz

I am so glad I chose your practice for my dental care , Dr. Green and the office staff are so warm and understanding about my dental needs, I appreciate your care and kindness. I look forward to us getting this dental problem fixed. Please tell Dr. Green that I said thank you! Sincerely, Yolonda L. Christian


John A., Denver

I was very impressed when I arrived at the office until I departed! Dr. Green is very comforting and sharp! I really was glad to be able to have Trisha, the Dental Assistant!! She is very knowledgeable and kind in explaining the process I will be receiving..EXCELLENT!!


Soren W, LANCASTER

Love you guys. Top professionals and top genial people!


Mindy R, Lancaster

Dr. Green and his staff were fantastic with my daughter! She was a little anxious about her procedure and they calmed her down and had her laughing in no time! Everyone was friendly and made the whole process as painless as possible!


Mike S., Lancaster

Professional staff, timely appointments. Dr. Green is highly skilled,and demonstrates a great concern for his patients.


Sandy S., Landisville

Very friendly and welcoming staff. Dental issue very clearly explained with options.


John R, Lancaster

First appointment - so far so good. Everyone I met were very nice and friendly.


Bob s, Lititz

Very professional and accomplished dental technician


Matt S., Ephrata

The staff at Dr. Green’s is very professional and caring. You just have to listen to how Dr. Green treats his staff and you know you will be taken care of! Trisha is a bubbly smile waiting to greet you. She demonstrates great bedside manor and compassion. The teamwork in this office is something to be proud of!


Bethany Ransom, Lancaster

Dr. Green and the staff were very courteous and kind. They answered all my questions and showed me compassionate care. I have heard Dr. Green is the best in Lancaster and now I see why!


Jeri Stumpf, Willow Street,Pa

Rarely have I had better treatment & care by a dental or dental specialist office in my life. Dr Green and his staff were extremely knowledgable & professional, and equally important, thorough, genuinely caring, and accommodating! They are the best! I will recommend them to all my friends & family!


Kelly K, Lancaster

Wonderful experience from the start! Very accommodating, friendly and thorough. Would highly recommend.


Ken m, Lancaster

Excellent what else is there to say


Rose M., Columbia

They made the procedure very simple and comfortable. Awesome staff. I would highly recommend them.


Vicki H, Lititz

As usual, everyone was very professional and treated me with respect. They are a great team!


Greg H., Leola

Was in for a routine cleaning. Rachel did a great job and was very helpful in making constructive suggestions for future care.


Jennifer C, Lancaster pa

I had several appointments and from start to finish I was treated with care and respect. I tend to have a bit of anxiety due to a swallowing condition I have. Many just laugh it off but the staff was wonderful. They explained everything they were doing and allowed me to communicate my needs through the procedure. Such friendly caring people! Thank you!!!


Marla K, Mount Joy

Appreciate the staff. Always very professional but make you feel very comfortable.


Herb M., Lancaster

I was greeted upon entering, told what was going to happen...and that's exactly what happened...and the experience was about as stressful as taking a nap.


Doug Miller, Lancaster

Very nice and competent technician.


Mindy P, Columbia

Everyone was so kind and welcoming to me as a new patient! They took time to explain everything and make me feel comfortable at all times!


Martyne Fischer, Columbia

Dr. Green really takes his time explaining everything thoroughly and seems to genuinely care about his patients. He wants to hear what you have to say and is open to all questions!


John F., Lititz

Great staff and service


Kaye W, Lancaster

Rachel does a great job. Staff is awesome, Dr Green too :)


Linda L, Paradise

Dr Green and his staff are welcoming and very professional. Everyone takes time to answer any questions I may have. Dr Green even took time to look up and provide information for me regarding a qualified periodontist for my daughter who lives in another part of PA.


Grant Becker, red lion

Dr. Green and his staff deliver a welcoming atmosphere, fantastic professionalism, and excellent care for all patients. I highly recommend the Dr. Gum Guy and his team to anyone seeking specialized dental care.


Bob, Mount Joy

First visit reveals an incredibly professional and friendly staff, who actually take the time to listen to and answer questions. The explanations of plans and options of treatment are clear and understandable.


George N, Lititz

I have had several prior periodontal surgeries for my gum disease, the old way. Less than 2 weeks ago I had the LANAP procedure performed by Dr. Gerry Green. I can't tell you how amazingly better the whole process went, from the time it took to perform the procedure to more importantly the huge difference, and how quickly, I have healed, and have seen the incredible difference in how my gums actually look and feel. I already feel like I have benefitted from the overall benefits of the procedure, the aftercare, and the amazingly wonderful feeling I now have compared to my prior experiences. I really look forward to seeing how well I progress given how well everything has already went!


Mary R., Lancaster

My consult with Dr. Green went smoothly from start to finish. The staff were all courteous, efficient, and professional. Dr. Green took time to ensure that all my questions were answered and discussed options for treatment.


Peg M. , Lititz

What an amazing practice! Dr Green and his staff are extremely welcoming and they take a lot of time to answer questions. The professionalism of the entire practice comes with zero arrogance. How lucky are we in Lancaster County to have Dr Green!


Kathryn L, Columbia

Excellent appointment!!


Beverly M., Mt Joy

First appointment for assessment of my teeth. Dr Green is very thorough and staff is friendly.


Emma S, Lititz

I've been with Dr. Green and staff for many years and would never go anywhere else..I'm so pleased with all the care they have given me over the years!!!


Joan B, Holtwood

Wonderful office! Really enjoy Rachel as my hygienist-she is excellent.


Malvenia A., Colwyn

Excellent patient service.


Curt E, Lancaster

Friendly and professional!! Very trustworthy


Anne M, York

I liked the staff immediately- they all shook my hand and were all smiles, yet professional. Dr Green was also very nice and took the time to explain many things to me. I hope for good experiences going forward.


Amy S, Landisville

Very thorough and personable.


Sandy, Lancaster

The start of a beautiful relationship


Steve F., Mount Joy

I was surprised and pleased with how everyone there had remembered me having visited 5 years ago. They are all extremely friendly, professional, knowledgeable in each of their respective roles. I have a lot of oral needs ahead of me at this time in my life. There was no pressure to have it all done at once. Dr. Green and his staff sat down with me to explain the needs and laid out different plans to take care of all these needs in a manner that was comfortable to me and my wallet. I really appreciate the fact that Dr. Green and my regular dentist, Dr. Richard Berg, regularly get consult together about their patients so that the best path for care is agreed upon. Everyone there was personable and I would recommend them highly.


Frank P, Strasburg

I was very happy with my first appointment. Dr. Green and his staff are very professional, pleasant and helpful.


Karl M, Willow Street

Rachel was very efficient, but also very gentle while performing my cleaning. I also appreciated her positive feedback regarding my efforts to maintain my teeth and gums. Always a positive experience with Dr Green and his friendly, knowledgeable staff.


Doug W., Ephrata

Always a good experience - everyone is knowledgeable, caring, friendly and has a sense of humor. Thank you Dr. Green, Rachel, Trisha and all!


Paula T., Millersville

As a health care professional myself, I truly appreciate the level of professionalism combined with friendliness that Dr. Green and his staff provide. An enjoyable and educational experience each visit!


Jannet K., Drumore

Left appointment confident of a solution for my ongoing teeth issues. Staff was very nice and personable. Dr Green is super.


Sandy S., Denver, PA

Of course, you don't go to a periodontist for a good time, but rather for treatment of a serious issue or issues. That being said, my visit was very comfortable and informative. I was at ease and received thoughtful and pleasant treatment from the time I walked in the door. It was an easy decision to go forward with the reccomended treatment plan.


Addie L, Manheim

Easiest numbing experience I’ve ever had.


Karen L., Lititz

Everyone on staff was friendly and helpful. Dr. Green explained all my treatment options in detail and was very kind and personable. The payment options were explained in detail as well. I left the office feeling like I will be in good hands.


Kaitlin Behmer, Lititz

I was so impressed with Dr. Green and his team. He was so personable and took the time to explain what needed to be done to fix my gum problem. I would recommend him to anyone!


Linda H, Lancaster

Rachel did an amazing cleaning and I always feel the appointment is friendly and thorough. I like alternating with Dr Green’s staff and my regular dentist so I know my gums are being well monitored.


Linda E., New Holland

Everyone very friendly. My stress level very high going into appointment but staff made me feel less stressed about the process and confident that I was in good hands. Glad I made the decision to see Dr Green instead of anyone else.


Kathy B., Lancaster

Everyone was very welcoming and thorough. I didn’t have to wait long to be seen and the doctor seemed to really care.


B Dearden, Lancaster PA

Great experience -very professional without being condescending and very kind and gentle!B


Lee MG, Lancaster, PA

I have been very pleased to have Dr Green as my periodontist for over two years. This practice is very good at dealing with dental anxiety. My dental health has improved markedly to a place of stability after a lot of problems. The dental technicians are professional and friendly. I highly recommend!


Erin H, Leola

Dr Green and his staff are top notch professionals! Dr Green saved my lower gum line, with grafting, which in turn saved my 5 lower teeth!!! He's so friendly, and cares about his patients. He's the BEST at what he does. I would highly recommend him and his staff...


Franklyn G, Lancaster

Completly satisfied


Gregory Hand, Leola

Extremely satisfied with appointment for cleaning. Rachel was very conscientious and explained procedure well, and no pain. Dr. Green explained course of treatment thoroughly. Advice provided in a non-judgmental manner.


Clarann G., Lancaster County, PA

Dr Green is awesome. Very caring, and does great work. Gentle, no pain and very concerned you are ok through all dental work. His follow up apts to check progress, adjustments, etc on work done is top notch. Staff and assistants are great, friendly and caring. Well run office and facility! I recommend them highly! They truly care about their patients!


Jenn, Denver

Dr. Green is very passionate about helping his patients. I never experienced a doctor with such compassion.


Edward K., Lancaster

I am extremely pleased with the results of my latest gum grafting of 2 back teeth. Dr. Green did another beautiful job of restoring my gum line. The entire staff is extremely friendly and helpful. I would highly recommend this practice to anyone.


BarbH , Lancaster

Dr. Green and Rachel are both very professional and 5 + stars.


Joanne M., Ephrata

I had a quick check-up with Dr. Green just last week. All of the staff are friendly, make you feel at ease and are well trained. I appreciate the care and attention given each time.


Morgan G, Columbia

Great experience from start to finish. Dr. Green and his staff are top notch!


Larry R, Lititz

Excellent visit. Excellent service. Issues and specific needs explained very well which I totally agree with. Enjoyed the communications with DR Green and staff. The schedule is in place. Great to visit the office with all those great ?? smiles. First class operation (top shelf) business. Thank you. Regards to the best lrx41


Kate T, Lancaster

Everyone in the office is always so pleasant and helpful! Rachel is great! Of course, Dr. Green is excellent and so cute!!


Kathy D, Lancaster

Dr Green and his staff are truly professional. I have met with Dr. Green twice regarding possible grafting and/or pinhole procedure. I feel very informed about my upcoming gum surgery.


Elizabeth D., Coatesville

Dr. Green and his staff excel at what they do. I would recommend Dr. Green in a heartbeat. He has restored my gums with many grafts, and I no longer fear that I will lose my teeth.


Deb S, Elizabethtown

Dr. Green and his staff are the best. I had gum grafting done so have to had many followup visits to make sure it was healing well. Every visit you are greeted with a smile and friendly conversation from the entire staff. The entire staff is friendly, knowlegeable and caring. I would highly recommend them!


M mccarthy, Lancastet

Once again...a first class office. From Kristin, Tammy and Dr Green...can't be better! M McCarthy


Nancy L., Reinholds

I was surprised to find out that I needed grafting and was extremely nervous about the procedure. It was a difficult area for treatment. I had a great experience-no pain at all. Dr. Green and the staff are wonderful and very caring.


Doug D, Lancaster

Dr. Green and Trisha did an excellent job yesterday with my gum grafting surgery. No pain yesterday, no pain today... I couldn't be more pleased with how I feel today (the day after)... I should know better than to research health care experiences on the internet, I was convinced there was going to be excruciating pain, during and for days/ weeks after ... haha!!! It was a great experience, with NO PAIN!!!


Edward Kenkelen, Willow Street, PA

I am extremely pleased with the results of my first gum grafting. Dr. Green clearly outlined the process and did a beautiful job of restoring my gum line. The entire staff is first class and very friendly. Trisha was an extremely helpful and cheerful hygienist during the entire process and Tammy was a delight to work with on scheduling and insurance claims. I would highly recommend this practice to anyone.


Stathy K, Lancaster

Periodontal work is one of the most difficult processes, as a patient, one has to go through. But the entire staff in the office always has a smile, and a great attitude. Takes a lot of the sting out what may be coming :)


Anonymous, Lititz

Dr. Green is very caring and down to earth. I was a ball of nerves and he made me feel so much better! His dental assistant, Taryn, was very friendly and knowledgeable. At the end of my Dr. Green and Taryn took me into the Consult Room and reviewed my case. I appreciated the level of privacy they gave me, which allowed me to ask questions w/o being embarrassed.