She thinks her time is more important than ours. She is always late; then instead of take care of a patient that already waited for an hour, she decides to have office meeting.

Riviera Allergy Medical Center: Ulrike Ziegner, MD, PhD
Riviera Allergy Medical Center: Ulrike Ziegner, MD, PhD at a glance
Google reviewers rate this allergist 4.9 out of 5 based on 364 reviews. Patients frequently praise the physician for thorough evaluations, clear communication, and identifying root causes of allergies and asthma, while also noting the staff’s professionalism. Recurring criticisms involve long wait times, missed appointments, and instances where the doctor declined to transfer medical records or dropped patients without prior notice.
- Google rating: 4.9 out of 5 from 364 reviews (95% five-star).
- Reviews on this page: 364 Google reviews (193 with written comments, 1 with photos).
- Owner responses: the business replied to 0% of reviews.
- Most recent review: February 26, 2026.
- Service: Allergy Testing Clinic serving Garden Grove, California.
Data from Google, last updated October 25, 2026.
Photos
Customer reviews
Reviews from Google, shown as published (original wording, unedited).
She is one of the most thorough doctors I have ever been to. Three of my kids see her. Expect the first appointment to take longer than usual because she doesn’t rush you, asks a lot of questions and explains everything very carefully. She truly is a gem!
Dr.Ziegner and staff are the best. Just a really good vibe all around. Very friendly, knowledgeable and professional. I had a feeling I was suffering from both indoor and outdoor allergies which they confirmed.thanks to Dr. Ziegner and staffs thorough testing. I also discovered that I have allergies to certain foods… I had no clue. Immunotherapy takes time but it has helped me improve my quality of life .Highly recommended if you are suffering from allergies and /or asthma or anything in between.
Dr. Ziegner seems to be a renowned doctor with extensive experience in the field of allergies. Thanks to her clear diagnosis, precise treatment, and thorough check-ups, my child has improved.
Absolutely amazing Dr & team. For years I struggled with fatigue issues, I had previously been told by other Dr's "that's life" when I told them what was going on. Dr Z helped me get to the bottom of what the problem was. Wonderful people to deal with.
Dr. Ziegner and the staff are very professional and the wait is as quick. Don’t believe the negative reviews - it takes time to properly evaluate allergic reactions and bronchial issues. Don’t believe any negative postings - we’ve been coming to Dr. Ziegner for over a decade - and Nobody is better. She and her staff are THE BEST IN THE SOUTH BAY.
very through
The staff at Riviera Allergy are INCREDIBLE. They are knowledgeable, friendly, empathetic, and efficient. I have had very positive experiences both times I've visited. I have a few more appointments scheduled as Dr. Ziegler is working hard to get to the root cause of the issues I came to her with. Highly recommend Riviera Allergy Medical Center!
Dr Z is very caring and attentive. My daughter is special needs. She communicates with her in a way that my daughter understands and is very comfortable with. To date I’m very happy and grateful for her expertise and bed side manner. She takes the time to explain to me and I never feel rushed in our appointments. A very experienced professional.
I feel like I'm in good hands!
Riviera Allergy Medical Center: Ulrike Ziegner, MD, PhD on Google Maps →
Business details
- Address: 1970 S Prospect Ave Ste 3, Redondo Beach, CA 90277
- Phone: (310) 792-9050
- Website: rivieraallergy.com
- Service area: Garden Grove, CA