1. Kristin Sieberling, MD

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Redlands, CA

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Kristin Sieberling, MD

3.7 (3 reviews)

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Allergy & Asthma Consultants - Front door

Allergy & Asthma Consultants

1.8(12 reviews)
2.2 mi

I was a bit apprehensive before taking my children to the clinic, having read some of the reviews…read morebeforehand. However, after visiting today, we all agreed that both the staff and the doctor were friendly and patient. Of course, one thing mentioned in the reviews was accurate: it is indeed a small clinic, and the facilities aren't exactly new, but it certainly isn't dirty or cluttered.

This place is a joke. When I needed a primary care authorization earlier this year, they claimed…read morethey had requested it. I waited a few weeks, assuming it was being handled, since they told me they had contacted my doctor. When I checked with the allergy clinic, they said they never received the authorization. I called my PCP's office, and they confirmed they had not received any request -- but said they would submit it right away. Two days later, the authorization came through. My PCP faxed it over, but when I called to schedule my shots, the allergy clinic claimed they still hadn't received it. I contacted my PCP again, and they had to call the allergist directly to confirm it was received. By the time I could finally schedule my allergy shots, I had to go back to biweekly injections instead of monthly. After several visits, I was told I could return to monthly dosing. However, when I came back a month later, they had miscounted the dosages and told me I'd have to go back to biweekly for another month. On top of that, they never have change when I bring cash for my copay, and they charge a service fee for using a debit or credit card. And when I asked for a refill of my allergy medication, they said I needed to schedule a consultation -- which would require a higher copay. I ended up just getting the prescription directly from my PCP.

Sharen Jeffries Knudsen, MD

Sharen Jeffries Knudsen, MD

3.5(11 reviews)
2.1 mi

Do not come here! I had my son's sleep study done through them and they told me on his post sleep…read morestudy appointment that his results were normal and though his tonsils were enlarged he was fine and he would grow into them. Then the pandemic hit. After the pandemic I took my son back to his primary physician to do an annual check-up on my kiddos. She asked me how his surgery went which at that time I told her that they told me he was fine and did not need it. This is when she turned the computer screen around and pointed to the test results which stated that my son had moderate to severe sleep apnea and that surgery was recommended to remove the adenoids and tonsils. Now we have to go through the whole process all over again. I would not recommend this office at all. We are now going through the whole process again and I refused the referral to this office.

I don't like places that don't keep their appointments on time and this place took 45 minutes to…read moresee me,I arrived 15 minutes before my appointment like they wanted than after they checked me in they took 30 more minutes to call me,45 minutes total just for the beautiful doctor to see me for two minutes and schedule a camera inspection so I left,and the front desk woman was a little racist,I'm a Hispanic guy and she talk to me "I'm gonna need your id and your ins card" and a few moments later a white guy entered and she said "mr Smith I would like to have your id and ins card please " ,I was seating right infront of her so I couldn't have heard her wrong ,I'm surprised about her unprofessionallism ,dam racist...

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Sharen Jeffries Knudsen, MD

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Kristin Sieberling, MD - allergist - Updated October 2026

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