About Services


Words from our patients

  • Google

    "Good, clean office, with friendly and caring staff. Have been to both doctors, Dr. Witten and Dr. Borisov are both very educated and caring."

    Verified Patient
  • Google

    "It's been over 10 years both me and my wife have been seeing Dr Witten. [...]been there for many ups and downs and we recommend them to anyone."

    John W.
  • Google

    "I would highly recommend this office for any and all internal medicine needs. They are efficient, professional and manage to have a great sense of humor."

    Scott M.
  • Yelp

    "I see Dr. Witten, and he is my favorite doctor ever. I feel so comfortable when I'm talking with him, and I can be honest and know he's not judging me."

    Angela A.
  • Yelp

    "As much as I don't like being sick, these guys were awesome and made me feel a lot better. I switched from my old doctor to them that week."

    R. A.


Ninth Avenue Internal Medicine
4500 East 9th Avenue, Suite 140
Denver, CO 80220
Phone: 303-394-2152
Fax: (303) 394-2496

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