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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 Longwell:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. John Longwell is Excellent. Dr. Longwell has been reviewed by 4 patients who have provided 2 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.1
Promptness 3.2
Courteous Staff 4.6
Accurate Diagnosis 4.6
Bedside Manner 4.1
Spends Time with Me 3.7
Follows Up After Visit 4.3

Specialties & Research

Dr. John Longwell, MD is board certified in Emergency Medicine.

Education & Awards

Dr. Longwell graduated from University of Chicago. He has 1 awards.

Patients' Choice Award (2014)


Dr. Longwell has 5 hospital affiliations:

  • El Camino Hospital 
  • John Muir Medical Center, Walnut Creek Campus 


  • German
  • Tagalog
  • Vietnamese
  • Spanish

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Additional Information
Dr. John Deforest Longwell MD is a male Emergency Medicine Specialist, has 45 years of experience and practices in Emergency Medicine and Internal Medicine.
Where does Dr. John D. Longwell practice?
Dr. John Longwell has 2 office locations.
Dr. John Longwell practices Emergency Medicine and Internal Medicine near Mountain View, CA.
Additional practice locations include: San Jose, CA.
See Mountain View Emergency Physicians and Mountain View Internists.