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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. Karl Erwin:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. Karl Erwin is Below Average. Dr. Erwin has been reviewed by 9 patients who have provided 2 comments. The rating is 1.5 out of 5 stars.

Patient Ratings
Ease of Appointment 1.3
Promptness 1.0
Courteous Staff 1.7
Accurate Diagnosis 1.0
Bedside Manner 1.0
Spends Time with Me 1.0
Follows Up After Visit 1.0

Specialties & Research

Dr. Karl Erwin, MD is board certified in Internal Medicine.

  • He has special expertise in 1 area:
  • Electrodiagnostics

Education & Awards

Dr. Erwin graduated from The University of Texas at San Antonio.


Dr. Erwin has 2 hospital affiliations:

  • Rhd Hospital 
  • Trinity Hospital 


  • Spanish

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Additional Information
Dr. Karl Daniel Erwin MD is a male Internist, has 29 years of experience and practices in Internal Medicine.
Where does Dr. Karl D. Erwin practice?
Dr. Karl Erwin has 1 office location.
Dr. Karl Erwin practices Internal Medicine near Dallas, TX.
See Dallas Internists.