Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. John R Douglas Peterson, MD

Individual provider Gastroenterology Physician · NPI 1164639274

Dr. John R Douglas Peterson, MD is a Gastroenterology in Washington, Missouri. Graduated from Tulane University School of Medicine in 2006, 20 years ago. Practices with Digestive Health Specialists LLC, a 70-clinician group and accepts Medicare assignment. Licensed in Missouri and South Carolina.

Years since qualifying
20
Trained at
Tulane University School of Medicine
Licensed in
MO, SC
In the registry since
2007
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

901 Patients First Dr Ste 3300
Washington, MO 63090-4700
Phone: (636) 239-7344
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 2016004841 (MO)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 35499 (SC)

Record details

NPI number1164639274
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 17, 2007
Last updated in NPPESJanuary 14, 2020
Certification dateJanuary 14, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Medical schoolTULANE UNIVERSITY SCHOOL OF MEDICINE
Graduated 2006 (20 years in practice)
Group practice Digestive Health Specialists Llc — 70 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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