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

John Thomas McMahan, MD

Individual provider Otolaryngic Allergy Physician · NPI 1518910272

John Thomas McMahan, MD is an Otolaryngic Allergy Physician in Appleton, Wisconsin. Licensed in Illinois. Registered with an NPI since 2006.

Licensed in
IL
In the registry since
2006
Specialties on file
2
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

247 S Nicolet Rd
Appleton, WI 54914-3938
Phone: (888) 938-3838
Fax: (888) 919-1083
Show map & directions

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

Specialties & licences

Otolaryngology Physician (primary) Taxonomy 207Y00000X · Licence 036051277 (IL)
Otolaryngic Allergy Physician Taxonomy 207YX0602X · Licence 036051277 (IL)

Record details

NPI number1518910272
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 17, 2006
Last updated in NPPESApril 1, 2025
Certification dateApril 1, 2025
Mailing address10001 W Innovation Dr Ste 200, Milwaukee, WI 53226-4851