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

Dr. Nicholas W Frederickson, MD

Individual provider Internal Medicine Physician · NPI 1154640225

Dr. Nicholas W Frederickson, MD is a Gastroenterology in Washington, Missouri. Graduated from Saint Louis University School of Medicine in 2010, 16 years ago. Practices with Mercy Clinic Gastroenterology LLC, a 65-clinician group and accepts Medicare assignment. Licensed in Iowa and Missouri.

Years since qualifying
16
Trained at
Saint Louis University School of Medicine
Licensed in
IA, MO
In the registry since
2010
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
Phone: (636) 239-7344
Fax: (636) 239-9436
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 2016012330 (MO)
Internal Medicine Physician Taxonomy 207R00000X · Licence R-8906 (IA)

Record details

NPI number1154640225
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 27, 2010
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 schoolSAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2010 (16 years in practice)
Group practice Mercy Clinic Gastroenterology Llc — 65 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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