Ninth Avenue Internal Medicine

Medical Clinics, Internal Medicine, Internist

4500 E 9th Ave #140, Denver, CO 80220

About Ninth Avenue Internal Medicine

Ninth Avenue Internal Medicine, led by Doctors Igor Borisov, MD and Daniel Witten, MD FACP, provides comprehensive and compassionate primary care to patients in the Denver Metro Area. Since 2003, the practice offers a full scope of medical services, including annual physicals, vaccinations, and management of acute and chronic conditions such as diabetes, hypertension, heart disease, thyroid disorders, COPD, and mental health issues. The medical team is known for their efficient and painless procedures, including EKG, spirometry, swabs, and on-site lab work. Patients appreciate Dr. Borisov's attentive listening, thorough explanations, and sense of humor, as well as the overall excellent service and staff. Dr. Witten is also highly recommended for his proactive and communicative approach, especially by professional athletes. Patients note that the team does a great job, with Dr. Borisov focused on delivering practical and supportive care. The care providers reflect his thorough and effective approach. Many have been patients for years, praising Dr. Borisov for being attentive, helpful, and practical in his recommendations. Recent visitors have highlighted efficient and great video visits, and expressed feeling genuinely cared for during appointments. New patients appreciate the time spent reviewing medical history and the staff’s friendly, professional attitude. Dr. Borisov never rushes through appointments, ensuring understanding before explaining what is going on and how to best address health concerns.

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Reviews for Ninth Avenue Internal Medicine

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  • Mar 2026

    Dr. Borisov was very nice. He made sure that I understood everything and asked questions that I hadn’t thought of. He did a great follow up call the next day to go over my lab results.

  • Mar 2025

    I have been Dr. Borisov’s patient for about 8 years now and he was always attentive, helpful and practical in his recommendations. I’d certainly recommend Dr. Borisov.

    My recent video visit was great and efficient

  • Mar 2025

    For the first time in a long time, I felt like I was truly being cared for in a medical office. As a new patient, Doc spent 10 minutes reviewing my medical history with me and truly took an interest in my current state of health.

Hours

Monday: 8AM - 5PM
Tuesday: 8AM - 5PM
Wednesday: 8AM - 5PM
Thursday: 8AM - 5PM
Friday: 8AM - 5PM
Saturday: ClosedSunday: Closed

Location

4500 E 9th Ave #140, Denver

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