MICHAEL C SEELEN MD
NPI 1366542037
Internal Medicine in Marshfield, WI

Q: What is Michael Seelen's NPI number?

The NPI number for Michael Seelen is 1366542037. It was assigned to this individual provider in the NPPES registry on September 23, 2006.

Q: What is Michael Seelen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Michael Seelen was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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 September 23, 2006

1000 N OAK AVE, MARSHFIELD, WI 54449(715) 387-5235 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 30, 2026.

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About Michael C Seelen Md NPPES

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

MICHAEL C SEELEN MD (NPI 1366542037) is an individual internal medicine provider in Marshfield, Wisconsin, licensed in Wisconsin (21525) and active in the NPI registry since September 2006.

NPPES Registry Identity

NPI1366542037

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameMICHAEL C SEELENCredential: MD

Location Address1000 N OAK AVEMarshfield, WI 54449

Mailing Address1000 N Oak AveMarshfield, WI 54449-5777 · (715) 387-5235

Phone(715) 387-5235

Sole ProprietorNo

Enumeration DateSeptember 23, 2006

Last NPPES UpdateSeptember 11, 2025

✔ NPI 1366542037 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in WI · 21525

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedUrologyTaxonomy 208800000X · License 21525 (WI)

1000 N OAK AVE, Marshfield, WI 54449

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Other Identifiers 1

Medicaid30180700WI

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.

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