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

Nicholas John McClellan, DO

Individual provider Pediatric Rheumatology Physician · NPI 1427410737

Nicholas John McClellan, DO is a Pediatric Rheumatology Physician in Marshfield, Wisconsin. Licensed in Michigan and Wisconsin. Registered with an NPI since 2016.

Licensed in
MI, WI
In the registry since
2016
Specialties on file
3
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

1000 N Oak Ave
Marshfield, WI 54449-5703
Phone: (715) 387-5511
Show map & directions

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

Specialties & licences

Pediatric Rheumatology Physician (primary) Taxonomy 2080P0216X · Licence 71985 (WI)
Pediatric Rheumatology Physician Taxonomy 2080P0216X · Licence 5101026041 (MI)
Rheumatology Physician Taxonomy 207RR0500X · Licence 71985 (WI)

Record details

NPI number1427410737
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 25, 2016
Last updated in NPPESMarch 24, 2026
Certification dateMarch 24, 2026