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Daniel Drennan, MD

1.0 (1 review)

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13 years ago

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Daniel Drennan - Comprehensive Pain Specialists

Daniel Drennan - Comprehensive Pain Specialists

3.9(27 reviews)
0.0 mi

Christopher Felt has the worst bedside manner I have ever experienced in a medical setting. Being a…read morechronic pain patient he makes me feel as though my conditions are nothing more than an inconvenience. I have been waiting over 3 months for a procedure and the office is claiming it is due to insurance denials. When I spoke to an imaging office, they told me the truth about the office- they don't do what is needed to get procedures and process out through insurance. All that was needed for an MRI to not come out of pocket for me was a peer to peer review and he refused to do so. When another medical office is apologizing for the treatment of your Dr based on a small ask they refused, you know you have a bad Dr. Dr Drennan is amazing. I have no issue with him he treats patients amazingly. If he would treat all patients his practice would be amazing. The ladies at the front desk are nice. They are aware the patient portal doesn't work correctly and apologize for that every time I come in. They say the drug testing is random, yet I have to leave a sample every time I come in. I take my medication as prescribed and I have had two test come back as bad. I think they using either a bad lab or bad practices sending in their samples. Be aware of th

I have been to 5 pain speialists over the past 8 years and Dr Drennan is the first one to treat my…read morepain vs pushing drugs like the previous 4. My pain is greatly reduced and he has helped me cut my medications by 75%. I am on 25% of the drugs others gave me and the injection treatments have dramatically reduced my pain. If you want a Doctor to actually address your pain Dr Drennan is the best I've encountered.

US Anesthesia Partners of Colorado

US Anesthesia Partners of Colorado

1.9(23 reviews)
13.4 mi•Stapleton, Northeast

***UPDATE....I emailed the business owner as asked below. Are you going to get this fixed? I pay…read moreyou and work hard to resolve your bookkeeping errors. I am waiting. Surgery in March. Paid in full, in April when the bill arrives. I keep having to prove I paid. It is now July, mailing more copies of confirmation number of paid bill. Another 30 minutes of my life, ink from my printer to print the paid receipt and USPS stamp gone...again. Can you get it right this time? I beg you!

I have been given the runaround from USAP since receiving a bill for $715 for a routine colonoscopy…read moredone in Jan of 2025. I was told by the Parker Adventist Hospital that this was a routine procedure. I have been reaching out to USAP since receiving the bill first to confirm why I was charged $357.50 twice in the same day for the same procedure. I thought for sure that was just a mistake. Evidently there was more than one person? I only met one when I was put to sleep. Then I asked why I was charged at all for something routine as I was told by my insurance company that there would be no charge. Bottom line, the hospital claims the procedure should still be billed as routine even though I had one small polyp removed. USAP took it upon themselves to use a code showing diagnostic and will not change it even after speaking directly to the hospital and insurance company in a 3-way call on 6/17/25 and confirming it should in fact be billed as routine. So after starting this run around in Feb 2025 I finally got shutdown by USAP on Sept 4th 2025 saying they would not change it and they're so sorry that no one told me that back when I first called. Btw I did reach out to the Patient Advocate for their company on 5/20/25, Courtney Cummings and I do not feel nor did I ever feel advocated for. She dismissed this as just another bill and there's nothing she could do about it. Oh well, not her problem. I will make sure not to use USAP in the future.

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US Anesthesia Partners of Colorado

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AVOS Dental Specialists

AVOS Dental Specialists

4.6(11 reviews)
10.0 mi

My son was referred by his orthodontist to AVOS to schedule an oral surgery appointment. Upon…read moreentering the building, we were warmly greeted by their front office staff who made our check-in seamless. As we waited, we sat comfortably in the reception area, which had a variety of refreshments and plenty of seating to pick and choose from. Shortly after, one of the surgical assistants (Pablo?) brought us into the consultation room and asked us questions on what brought us to their office. Then the assistant brought in Dr. Dustin Haupt to begin the consultation. Dr. Haupt was thorough with explaining the surgery as well as gave us ample time to go over any questions we may have for him. The patient coordinator made it easy to schedule our appointment as well as take payment too. Overall, we are confident in proceeding with my son's recommended treatment at AVOS.

Disappointing experience. I had an appointment scheduled for an extraction with Dr. Ana. When I…read morearrived, a different surgeon was assigned to me. His name wasn't on the door or on any of the paperwork I was sent home with - it was handwritten in at the bottom of the paperwork. I had an upper molar extraction. I was told bone grafting was essential even though I didn't want an implant. I was charged $1,835. I had the same upper molar on the side of my mouth removed nine months earlier elsewhere - for $365. An attempt was made to upsell stem cell injection into my extraction site for $400 more - I declined. I was in horrific pain on the Friday before a holiday weekend so I did what I had to do and paid $1,835 for a single molar extraction. 19 days later, I returned to have my stitches removed. I didn't see the surgeon. An assistant told me that since I wasn't going to pay for an implant, there was no reason to see the surgeon and that the assistant would remove my stitches himself - he did. Then, I was told to go to the front desk where I was told that I should have been charged $1,865 instead of $1,835 so I have an outstanding balance of $30 after today's stitches removal. I stated I was not going to pay an additional $30 today. The assistant who removed my stitches (3 weeks post extraction) told me to wait another week (4 weeks total) before eating anything hard, but the paperwork I was sent home with on the extraction day said to wait only two week so I had already been eating hard food for a week per surgeon orders... Very frustrating after following all the written instructions perfectly. I will not be going back.

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AVOS Dental Specialists
AVOS Dental Specialists
AVOS Dental Specialists

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Relevare infusions of Colorado - Each patient gets a private room for their IV ketamine treatment. Comfy chair, eye shades and music to aid in your journey.

Relevare infusions of Colorado

5.0(6 reviews)
8.8 mi

I couldn't be happier with my experience at Relevare…read more Dr. Mallek is extremely competent and knowledgeable, combined with a compassionate and sincere interpersonal manner. Ketamine infusions can be disorienting and challenging, but with her and her staff, I always felt like I was in good hands. It's a wonderful contrast to many of the healthcare providers I've worked with in the past, who were either disinterested or arrogant or seemed interested only in extracting payment. The clinic is small but well appointed, which lends to the personal feeling. The infusion rooms are comfortable and private. There is frequent follow up and measurement of how one is responding to treatment. Ketamine infusions are expensive, but the rates here are competitive with all the providers I contacted in the area, and significantly cheaper than many. Overall, I would highly recommend Relevare!

Dr. Mallek is a kind and experienced ketamine provider. I had a lot of questions and she answered…read moreall of them to my satisfaction. Her clinic is beautiful and welcoming. The ketamine infusion room is very comfortable. I enjoyed my session very much and have scheduled my next one. She has educational material available as well. Dr. Mallek personally invests a great deal of herself during the initial consultation. She's not just interested in the stats required to give her patients ketamine. She's interested in getting her patients healthy in all different areas and genuinely cares.

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Relevare infusions of Colorado - IV therapy area
 NAD, Myers, Vitamin C, alpha lipoic acid, NAC and more

IV therapy area NAD, Myers, Vitamin C, alpha lipoic acid, NAC and more

Relevare infusions of Colorado - Dr. Mallek has over 10 years experience with IV ketamine and is passionate about helping you live your best life. #restoringhope

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Dr. Mallek has over 10 years experience with IV ketamine and is passionate about helping you live your best life. #restoringhope

Daniel Drennan, MD - anesthesiologists - Updated May 2026

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