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
Mailing address18 Oak Rdg, Springfield, NJ 07081-3719

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