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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. John Willsen:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (3)

The overall average patient rating of Dr. John Willsen is Excellent. Dr. Willsen has been reviewed by 7 patients who have provided 3 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 5.0
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. John Willsen, MD is board certified in Dermatology.

  • He has special expertise in 5 areas:
  • Acne (Acne Vulgaris)
  • Acne Rosacea
  • Melanoma
  • Psoriasis
  • Skin Cancer

Education & Awards

Dr. Willsen graduated from Stanford University. He has 2 awards.

Patients' Choice Award (2014 - 2015)
On-Time Doctor Award (2015)


Dr. Willsen has 2 hospital affiliations:

  • Emanuel Medical Center 
  • Kaiser Foundation Hospital - Modesto 

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Additional Information
Dr. John Julius Willsen MD is a male Dermatologist, has 35 years of experience and practices in Dermatology.
Where does Dr. John J. Willsen practice?
Dr. John Willsen has 1 office location.
Dr. John Willsen practices Dermatology near Modesto, CA.
See Modesto Dermatologists.