I've been a patient of this office for many years going back to 2017, with Dr Ahn, for my by pass then Dr Chan. for maintenance and follow up heart health. Going through all the name changes from Inland Cardiology, to Elite to now United Heart. For the most part, it's been just ok. Nothing stands out as spectacular or amazing from this office. I started visiting this office because the folks at San Antonio had good words for them, and i was happy with my experience at SAH. But lately, it seems the care part of the office has become more and more lackluster and a let down. Example: I've had a check up follow up appointment set up for about a year now. 3 days prior, the office called to confirm the appointment and prepare. So far so good.. Then on the day of the appointment, I show up to a sorry "no appointment ". Mind you, This is a 3 part appointment, requiring a stress test, an echo test, then the follow up go over results appointment all on different days. All canceled for no reason whatsoever, no real good reason provided too. just a bunch of sorry's i dont know why. Yet, this is not the first time this has happened. The same thing happened on that appointment a year ago, showed up, appointment was cancelled. Some one tried reaching you. The only difference was that last years appointment, the excuse was " the tech didn't show up", so no one available to conduct the test so at least a reason was provided. Im writing this because 1 time,,ok...reasonably understandable, but a 2nd time? To me, this is very unprofessional and to reschedule you for an appt 3 months from today, is simply unacceptable. Sure, the receptionist gal says " i understand-i understand" after hearing me complain that i took several days off work to make sure I make those 3 appt days, and did all the prep work for the exams, but do they really understand ? Or is it all just lip service? Sure felt like it's just another day at the office. I asked for something sooner, no-nothing. Then I was informed I needed an authorization that usually take several days to obtain. What the f! I've had this appointment made for a year! And here we are at the last minute, they tell me i need an authorization? Someone dropped the ball, and im being punished to no fault of mine. Obviously im not happy. But what can you do? Heres another thing, They provide you with a reminder card that lists all the dates set up in the computer for all your upcoming appointments. In my mind, what good is that when they don't work to hold up those dates anyway. I had my card from last year that said i had an appointment, but all those dates are no good. They also provide you a handout sheet in preparation for a test appointment, don't eat or drink for 24 hours prior, and God forbid, don't just "not show up" because you will be charged $200 for cardiolite medication that is ordered in advance. Hmmm, I wonder who paid for that medicine since my test appointment was cancelled. Im guessing insurance was charged. So in turn, I paid for that medication anyway. They charge you if you cancel an appointment, but no accountability on their part when they cancel it for no reason. You ask "what can be improved? ...Improve on that. read more

Difficult to reach, disorganized front office, and serious concerns about care. We will not be returning. I'm a caregiver and have been bringing one of my residents to Dr. Ahn at United Heart Institute for the past two years. He's been a long-time patient, but my experience with this office during those two years has been consistently stressful and disappointing. Impossible to Reach & Lost Forms Just like other reviews say, it is extremely hard to get in touch with anyone here. Voicemails rarely get returned, and whenever forms are faxed, the answer is almost always, "We didn't receive it." Most recently, my resident needed cardiology clearance for a dental procedure under general anesthesia. The dental office faxed the form: "We didn't receive it." I personally faxed it myself: still "We didn't receive it." I called multiple times, left voicemails, and heard nothing back. Eventually, one medical assistant told me to email it. I did--and then waited a week with no response, even after emailing twice to ask if she'd received it. No reply. When I called again very upset, I was finally transferred to a different medical assistant who, thankfully, actually helped. She had me stay on the phone while she confirmed receipt of my email, got the form to Dr. Ahn, and arranged for my resident to come in for an EKG within a week. I am genuinely grateful for her--she's the only reason the clearance moved forward. Front Desk Confusion The disorganization isn't just behind the scenes--you can hear it from the waiting room. While sitting there, I heard a receptionist on the phone with a patient who was asking about their appointment time. The receptionist literally said she didn't know why the appointment was made and then told the patient she would just cancel the appointment. That alone made me very uneasy. On top of that, because I couldn't get anyone to reliably call me back about the clearance, I had proactively booked a future appointment with Dr. Ahn (a month out). After we were squeezed in for the EKG visit, I asked the front desk to cancel that future appointment since it was no longer needed. The receptionist told me, "Oh, that appointment was already canceled." No one called me. No one informed me. No explanation. It's very concerning that appointments can be canceled behind the scenes when no one even seems to know what they're for. Long Waits & Poor Communication in the Visit Even when you arrive early or on time, be prepared to wait an hour or more past your scheduled appointment. This has happened repeatedly over the last two years. At the most recent visit (for EKG/clearance): The medical assistant said we were there for a "6-month follow-up". I had to correct her and explain we were there for EKG and surgical clearance. She then had to search the chart to find the form before finally doing the EKG. When Dr. Ahn came in, he greeted us as if we were there for a routine 6-month follow-up--again, I had to correct him and remind him this was specifically for clearance. He then said my resident needed an EKG, and the MA had to tell him, "I already gave you the EKG; it's in your papers." This does not inspire confidence that the chart is being reviewed or that the team is communicating. Clinical Concerns In the two years I've been bringing my resident: No blood work has ever been ordered by Dr. Ahn to monitor how his heart meds are affecting his body. All labs were done by his primary care physician, who eventually had to discontinue one of the blood pressure medications prescribed by Dr. Ahn because it was worsening his kidney function. When I told Dr. Ahn about this and offered lab results, he initially brushed it off as unnecessary. As a nurse, I know how important that information is, so I brought the labs anyway and asked that they be added to the chart. Final Thoughts After two years of: Being unable to reach anyone reliably Fax and email issues Appointments mysteriously canceled without notice Hour-plus wait times even when on time Miscommunication in the exam room And a lack of proactive monitoring of heart medications This last experience was the final straw. While I am thankful for the one medical assistant who genuinely tried to help us, we will not be returning to United Heart Institute or Dr. Ahn. read more

I am writing to file a formal complaint regarding my experience with United Heart Institute and the repeated delays in completing a stress test that was ordered by my referring physician(s). I have been attempting to complete this stress test since approximately August 2025. During this time, United Heart Institute has repeatedly canceled my appointments and rescheduled them several months later, typically 2 to 4 months after the original appointment date. Most recently, my appointment was canceled less than 24 hours before the scheduled date and time, despite my having made the necessary arrangements to attend. Once again, I was offered a replacement appointment several months in the future. This pattern of repeated cancellations and lengthy delays has prevented me from obtaining a medically necessary diagnostic test ordered by my physician(s). After waiting for many months, I remain unable to complete the evaluation that was requested as part of my medical care. These delays have: * Significantly delayed necessary cardiac testing. * Created uncertainty regarding my health and treatment. * Caused substantial inconvenience, frustration, and disruption to my personal and work schedule. * Undermined my confidence in the ability of the office to provide timely patient care. I have made every effort to attend each scheduled appointment and have complied with all instructions provided. However, the repeated cancellations by the office, combined with the lengthy rescheduling delays, have made it extremely difficult to receive the care that was ordered. I respectfully request: 1. A formal review of my case and the repeated appointment cancellations. 2. An explanation for the ongoing delays and last-minute cancellations. 3. Assistance in scheduling and completing the stress test as soon as possible. 4. Information regarding any corrective measures being implemented to prevent similar experiences for other patients. read more

This was a horrible experience and would not recommend going there, I went in for heart skipping a beat often I waited over an hour there and all I heard was staff joking with bad language (cursing). Once called back I told them I needed to use the bathroom less than 3 mins later I went back for them to tell me they gave my room to someone else and I would have to wait longer, the lady at the front desk was rude and kept starring at me. I left and will never go back. read more

The initial appointment went fairly quickly and I was seen before I was even able to finish my new patient paperwork but after that everything else went downhill. Was supposed to book my appointment for a scan at the nearby hospital but the front desk person checked the wrong boxes. So the hospital told me to have them fix it and 3 calls and 3 voicemails later no one ever calls back. They're also rude when you call back so I cancelled my other 2 appointments with them and will look for another cardiologist. read more

Waited 90 mins to be seen for a 4:30 appt I was on time for. I was seen last at 6pm and was told I have CAD. Worst bedside manner for a shocking diagnosis and told someone will call you tomorrow to schedule a 3 month follow up and send in your meds. I had to call! . I was also told call if you have questions and your CTA results will be ready the next day. Come to find out there are serious risks and interactions with the meds I was prescribed with what I'm taking that even the pharmacist urged me to call the Dr. to discuss this. I have left messages and no one calls back. You call and get transferred to a voicemail with no identifying name or who you were transferred to. I asked about my previously diagnosed leaky heart valve and was told by Dr Samarany not to worry about it. I'm already searching for a new cardiologist because I don't want to be under their care if something happens to me. They have shown poor patient care so I'm sure a heart attack wouldn't even get a call back. I'm left scared with a diagnosis for which I don't understand and no one to talk to. read more