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Internist, Oncology Specialist (cancer)
39 years of experience
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Karen Ratner:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (5)

The overall average patient rating of Dr. Karen Ratner is Below Average. Dr. Ratner has been reviewed by 9 patients who have provided 5 comments. The rating is 2 out of 5 stars.

Patient Ratings
Ease of Appointment 2.1
Promptness 1.2
Courteous Staff 1.9
Accurate Diagnosis 2.1
Bedside Manner 2.4
Spends Time with Me 2.4
Follows Up After Visit 1.2

Specialties & Research

Dr. Karen Ratner, MD is board certified in Internal Medicine and Medical Oncology.

  • She has special expertise in 1 area:
  • Cancer

Education & Awards

Dr. Ratner graduated from University of California at San Francisco. She has 2 awards.

Bridges to Excellence Recognition
Physician Office Systems Recognition (2014 - 2016)
Level III
NCQA Physician Practice Connections - Patient Centered Medical Home (2014 - 2017)


Dr. Ratner has 14 hospital affiliations:

  • Centura Hlth-Porter Adventist Hosp 
  • Centura Health Littleton Adventist Hospital 

> > > > Dr. Karen Ratner, MD

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Additional Information
Dr. Karen Nora Ratner MD is a female Internist, has 39 years of experience and practices in Internal Medicine and Medical Oncology.
Where does Dr. Karen N. Ratner practice?
Dr. Karen Ratner has 1 office location.
Dr. Karen Ratner practices Internal Medicine and Medical Oncology near Littleton, CO.
See Littleton Internists and Littleton Oncologists.