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

Dr. William Stuart Mainker, MD

Individual provider Internal Medicine Physician · NPI 1922332238

Dr. William Stuart Mainker, MD is an Internal Medicine Physician in Springfield, New Jersey. Practices as a sole proprietor. Licensed in New Jersey.

Licensed in
NJ
In the registry since
2009
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

18 Oak Rdg
Springfield, NJ 07081-3719
Phone: (908) 277-3675
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 25MA02323400 (NJ)

Record details

NPI number1922332238
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 21, 2009
Last updated in NPPESSeptember 21, 2009

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