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

James Calvin Niewenhuis, MD

Individual provider Anatomic Pathology & Clinical Pathology Physician · NPI 1356367924

James Calvin Niewenhuis, MD is an Anatomic Pathology & Clinical Pathology Physician in Grand Haven, Michigan. Licensed in Michigan. Registered with an NPI since 2006.

Licensed in
MI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1309 Sheldon Rd
Grand Haven, MI 49417-2404
Phone: (616) 847-5257
Fax: (419) 866-5453
Show map & directions

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

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence 4301055088 (MI)

Record details

NPI number1356367924
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 15, 2006
Last updated in NPPESJune 16, 2014

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