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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).

Patient Reviews

Patient comments (7)

The overall average patient rating of Dr. Douglas Sieminski, Family Practitioner is Good. Dr. Sieminski has been reviewed by 23 patients who have provided 7 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 4.7
Promptness 4.5
Courteous Staff 4.2
Accurate Diagnosis 4.8
Bedside Manner 4.8
Spends Time with Me 4.6
Follows Up After Visit 4.7

Education & Awards

Dr. Sieminski graduated from New York Institute of Technology, Old Westbury. He has 5 awards.

Patients' Choice 5th Anniversary Award (2012 - 2014)
Patients' Choice Award (2008 - 2014)
Compassionate Doctor Recognition (2010 - 2014)
Bridges to Excellence Recognition
Bridges to Excellence Medical Home Recognition (2013 - 2016)
Level III
NCQA Physician Practice Connections - Patient Centered Medical Home (2013 - 2016)


Dr. Sieminski has 3 hospital affiliations:

  • Newton Memorial Hospital 
  • St. Clare's Hospital-Denville 
  • St. Clare's Hospital-Sussex 


  • English

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Additional Information
Dr. Douglas Peter Sieminski DO is a male Family Practitioner, has 8 years of experience and practices in Family Medicine.
Where does Dr. Douglas P. Sieminski practice?
Dr. Douglas Sieminski has 3 office locations.
Dr. Douglas Sieminski practices Family Medicine near Newton, NJ.
Additional practice locations include: Sparta, NJ.
See Newton Primary Care Doctors.