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

Mrs. Diane M Oppeneer, APNP

Individual provider Nurse Practitioner · NPI 1831174143

Mrs. Diane M Oppeneer, APNP is a Nurse Practitioner in Manitowoc, Wisconsin. Qualified in 2003, 23 years ago. Practices with Froedtert Manitowoc Medical Group, LLC, a 157-clinician group. Licensed in Wisconsin.

Years since qualifying
23
Licensed in
WI
In the registry since
2005
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Practice location Address checks out

1650 S 41st St
Manitowoc, WI 54220-7316
Phone: (920) 476-6200
Show map & directions

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

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 2302-033 (WI)

Record details

NPI number1831174143
Entity typeIndividual (Type 1)
GenderFemale
Credentials APNP
Sole proprietorNo
NPI enumeratedDecember 8, 2005
Last updated in NPPESOctober 9, 2025
Certification dateOctober 9, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Group practice Froedtert Manitowoc Medical Group, Llc — 157 clinicians
Accepts Medicare assignment Not indicated
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients89
Services billed 245 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Holy Family Memorial Hospital · Manitowoc, WI

Colleagues at Froedtert Manitowoc Medical Group, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 157 clinicians in the practice; 12 are shown here.

Other providers in Manitowoc