Professional, courteous and knowledgeable. I'm glad to have her as a member of my health care team.read more

I read amazing reviews about these doctors and was excited to be on their appointment list but…read moreevery time I had an appointment, they were super late and not organized. I once waited over an hour and half to be seen. Never went back.

Been with Dr Umosella for over 20 years. He is thorough and knowledgeable of many signs that he is…read morequick to recommend good specialist follow up. I retained him even I moved to Virginia.

Dr. Umosella is a very good doctor. He is a kind, patient man. I like him, respect him and I trust…read morehim. The other doctors all seem to be very well-qualified, too, but I don't really know them. The front office is efficient, although they are not that friendly. The office, itself, could use a little cheering up!

I get my allergy shots at Premier Allergist in Rockville (Shady Grove location) and it's been a…read moregreat experience so far. I started my shots recently and go twice a week. The staff is super nice, and the walk-in appointments make it really easy to manage with a busy schedule. Once I get there, they're quick and efficient, so I'm in and out in no time. Walk-in shot hours: * Monday: Closed * Tuesday: 9:00 AM - 4:30 PM * Wednesday: 10:00 AM - 6:30 PM * Thursday: 9:00 AM - 4:30 PM * Friday: 8:00 AM - 2:30 PM You do need to wait 30 minutes after your injection, but the process is smooth and well-organized. Highly recommend this location if you're starting allergy shots!

Showed up for appointment. Office is closed! No prior warning. I got a text two days ago to confirm…read morethe appointment and I did. Staff says they tried calling patients to reschedule, but might not have gotten to all! I took time off from work. Very unprofessional and irresponsible. A lady was by the door scratching her head like me. She said this has happened to her before. Apparently my doctor won't be here for a long time. Fine, but the staff should have done their job and actually tell patients. I'm not giving one star because I started two months ago with another doctor and he seemed competent. Then he left, again no notifications to patients. I will try to find a different office.

Dr. Viet Nguyen is someone who I can always rely on for any medical reasons. He's been my doctor…read morefor several years now and his office is always clean, organized, and staffed with great employees. Would definitely recommend!

The past experience was great. However, recently when the pandemic started, their quality of health…read morecare has really gone down. I tried giving this place a couple chances as with the pandemic everyone has been effected so we have to be lenient, but I have officially hit my end point. My results were not delivered to me but another family member which was really irresponsibly as per HIPPA. Due to that wrong information was not passed back to me. I didn't find this out till months later when needing results for work and going on the lab website to retrieve them. Another is that one of my relatives who has trouble with technology had asked me to help them on retrieving their results as well. However, when inputting their name no results were found! It's been over 2 months past the appointment in which they had gone to the lab to get test done!! So then we tried called the office to ask what was going on and they just told us that it was our own responsibility to figure out the test and call it in ourselves?? How great, you write the order but can't help us retrieving it. Well thanks for nothing. I was actually able to retrieve the results after going through papers that were kept after each appointment/ order. Thank goodness these papers were saved! And the reason to why we couldn't find the result? The name was incorrect! How is the name incorrect?? They have done test here prior and received results, but this time and this test just happened to be a different name when there was no chance in the name of the ID given or the insurance card? Anyway, thanks for the past care that we received here. We will not be coming back.

I've had so many subpar doctors, especially since they all got bought up by INOVA, but I LOVE Dr…read more Mathur. She spends so much time with me and is available on short notice for her patients. She's knowledgeable and if she doesn't know something, she finds out and calls back quickly. Her staff is fantastic! Everyone I've dealt with is friendly, knowledgeable, and responsive as well. Yes, it's concierge, and I feel fortunate to be able to afford it. I wish everyone could get this level of care.

THIS IS NOT CONCIERGE SERVICE…read more Dr. Mathur blew me off when I returned from overseas after 2 weeks in hospital. I was in a London hospital for about 2 weeks. During this 2 weeks I sent doctor Mathur emails to keep her updated so, I could be treated immediately when I returned. So, Dr,. Mathur took off January 29 and is never in the office on Mondays and works only a half a day on Fridays. I limped home and arrived in the United States on January 28, 2026, and On January 29, 2026, Dr. Mathur informed me that she taking the day off on January 30. Yes, she really did. After 2 weeks of emails she tells me the day before I needed to see her, that she was taking the day off. For the second time during my short concierge period, she referred me to another doctor. Unprofessional and lack of concern for my well-being. I canceled my agreement with the office.

Dr. Adaku Onukogu was recommended to me by my Doctor at my Pain Management Center at Holy Cross…read moreHospital. My primary care doctor moved away, so I had been researching for a new doctor to replace her. Dr Adaku Onukogu is well knowledgeable in most all fields and is not hesitant in recommending great specialists who know and are experienced She is brilliant, performs all the right tests or sends me for further imagining. She reports back to me the findings. Now that I am 79.5 years old, my daughter accompanies me to all doctor appointments and some testing appointments. She will make room in her busy schedule to see me. I am so relieved to have a doctor who listens to my reasons why I need to see her ASAP ... and unlike others reviewing here, I found her staff and nurses excellent, proficient and welcoming! Rene'

Today was my first visit to Dr O's office. Foolish me, I was used to loooooonnnnnng waits at other…read moredoctors' offices so I arrived 45 min early. The office wasn't open yet. Unbeknownst to me, I met Dr O at the door and she kindly pointed me to a nearby cafe. When I returned, she had opened a little early and let me in. The entire staff was friendly and efficient. Dr O was incredibly thorough and even after I had raised some forgotten concerns, she repeatedly asked, "Anything else?" Her calm, friendly manner quieted some of my fears and white coat anxiety. I booked my 6 month follow up and am looking forward (???) to my next appointment. I feel like I have a team cheering me on to good health! Thank you!