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27 years of experience
Video profile
Accepting new patients
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. William Crelin:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

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Patient Reviews

  • Currently 2 of 4 stars
Patient comments (3)

The overall average patient rating of Dr. William Crelin is Satisfactory. Dr. Crelin has been reviewed by 8 patients who have provided 3 comments. The rating is 2 out of 4 stars.

Patient Ratings
Ease of Appointment 3.2
  • Currently 3.1666666666667 of 4 stars
Promptness 3.6
  • Currently 3.6 of 4 stars
Courteous Staff 3.0
  • Currently 3 of 4 stars
Accurate Diagnosis 2.8
  • Currently 2.8 of 4 stars
Bedside Manner 2.8
  • Currently 2.8333333333333 of 4 stars
Spends Time with Me 2.7
  • Currently 2.6666666666667 of 4 stars
Follows Up After Visit 2.2
  • Currently 2.2 of 4 stars

Specialties & Research

Dr. William Crelin, MD is board certified in Internal Medicine.

  • He has special expertise in 5 areas:
  • Diabetes
  • Diabetes Mellitus
  • Diabetes
  • Pituitary Diseases
  • Thyroid Diseases

Education & Awards

Dr. Crelin graduated from Medical College of Wisconsin, Milwaukee.


Dr. Crelin has 2 hospital affiliations:

  • Waukesha Memorial Hospital 
  • Oconomowoc Memorial Hospital 


  • English

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Additional Information
Dr. William C Crelin MD is a male Internist, has 27 years of experience and practices in Internal Medicine.
Where does Dr. William C. Crelin practice?
Dr. William Crelin has 1 office location.
Dr. William Crelin practices Internal Medicine near Waukesha, WI.
See Waukesha Internists.