DR. STEPHEN JAMES MAASSEN MD
NPI 1972610426
Family Medicine in Oshkosh, WI

Q: What is Stephen Maassen's NPI number?

The NPI number for Stephen Maassen is 1972610426. It was assigned to this individual provider in the NPPES registry on August 23, 2006.

Q: What is Stephen Maassen's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Stephen Maassen was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since August 23, 2006

855 N WESTHAVEN DR, OSHKOSH, WI 54904(920) 303-8700(920) 303-8832 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Dr. Stephen James Maassen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. STEPHEN JAMES MAASSEN MD (NPI 1972610426) is an individual family medicine provider in Oshkosh, Wisconsin, licensed in Wisconsin (25987) and active in the NPI registry since August 2006.

NPPES Registry Identity

NPI1972610426

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameDR. STEPHEN JAMES MAASSENCredential: MD

Location Address855 N WESTHAVEN DROshkosh, WI 54904

Mailing Address3301 W Forest Home AveMilwaukee, WI 53215-2843 · (414) 647-6326 · Fax (414) 671-8860

Phone(920) 303-8700

Fax(920) 303-8832

Sole ProprietorNo

Enumeration DateAugust 23, 2006

Last NPPES UpdateMarch 7, 2023

✔ NPI 1972610426 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in WI · 25987

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

855 N WESTHAVEN DR, Oshkosh, WI 54904

Open in Google Maps ↗

Other Identifiers 1

Medicaid32829300WI

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JACQUELINE ANN OTS PENDING

Nurse Practitioner